Fairly self explanatory. Only one caveat: no toll road ramps. This is because toll road ramps are longer than average, and would flood this thread.
This is for ridiculously long ramps from freeway to freeway, freeway to arterial (or vice versa), and arterial to arterial.
What constitutes an on/off ramp?
1: The ramp must be free-flowing in its entirety (stoplights/stop signs/roundabouts at endpoints are fine, and ramp meters are fine).
2: It must be one-way (parclos/trumpets where roadways come close together or share pavements are fine).
3: It must have a distinct diversion from the mainline of the road it "exits" . I.E. if the ramp is the thru movement in an interchange, it would not count. There nay be scenarios where the "thru movement" could count as an on/off ramp, but for the most part they don't. See my examples below for a through movement ramp that does count.
4: Any C/D road needed to get to/from the ramp does not count in the final distance. A C/D road is any ramp that, one you exit, you have a choice to merge back onto the road you just exited. No exceptions here.
5: The ramp may not exit and enter onto the same road. This may be a weird rule to include, however there are some situations where this might come up. (carpool ramps are allowed, if they go from general lanes to priority lanes, or vise versa).
With that out of the way, here are my contributions:
Exit 49 on I-70 in CO (https://goo.gl/maps/rp6W1SYumidw9fVX8). This one is 0.9 miles long, and it is an interesting situation. The river separates the main road from the ramp for quite a ways.
the movement from WB I-10 to NB AZ-51 in Phoenix, AZ (https://goo.gl/maps/2aUZ6GsfyPiHs21n7). This extremely long ramp is 1.1 miles in length, and is the exception to rule 3. It clearly exits off the mainline (I-10), so it does count.
And last, but by far not least:
the movement from NB I-45 to SB I-69 or SB TX-288 in Huston, TX (https://goo.gl/maps/F2fPGSv6cja2R2Gj9). This insanely long ramp is 3 miles long! There isn't much else to say except that I know there are longer ones in TX. I'll leave those for you to find.
Good luck hunting!
https://www.aaroads.com/forum/index.php?topic=16898.0
Not mentioned in either thread are these:
MD-198 westbound to I-95 southbound in Laurel, Maryland (https://www.google.com/maps/dir/39.102231,-76.8765701/39.0897634,-76.8939634/@39.0956627,-76.8952453,15z/data=!4m2!4m1!3e0)
I-405 southbound to I-105 eastbound near LAX (https://www.google.com/maps/dir/33.937822,-118.3686239/33.9315242,-118.3690691/33.9296726,-118.3662797/33.9324723,-118.3586622/@33.9337919,-118.369155,16z/data=!4m2!4m1!3e0) (this one is metered)
If we're talking non-flyover, ground level-only ramps, the I-84 East on-ramp from I-684 is 1,402 feet long.
A few I can think of:
The I-84 East on-ramp from CT 4. Including the SR 508 portion, it's over a mile long. But even the ramp portion is long because it is separated by a Jersey barrier and is designed to end past the CT 9 exit to prevent crossovers (but it was designed that way even before that portion of CT 9 opened in anticipation of I-291)
The westbound ramp from Slater Rd. Designed the same way to prevent crossing to CT 72 East
I-84 Exit 62-60. The c/d road is almost 2 miles long, and Exit 60 requires that you stay on it for almost a mile and a half.
Another one I didn't see mentioned in the other thread: I-295 NB to I-95 NB & I-95 SB to I-295 SB on the north side of Richmond. (https://www.google.com/maps/dir/37.6534394,-77.4324741/37.6722521,-77.4480097/@37.6637595,-77.4452845,2841m/data=!3m1!1e3?hl=en)
(Those with better knowledge can correct me, but I'm under the impression the design of these ramps is a relic from when I-95 was to be routed around Richmond? The NB ramp especially, which is striped for 2 lanes but appears to be wide enough for 4 lanes (https://www.google.com/maps/@37.6639137,-77.4475684,3a,37.5y,348.25h,84.58t/data=!3m6!1e1!3m4!1snvllxvQBD1HlSYJmyWikWg!2e0!7i16384!8i8192?hl=en), seems to hint at this.)
For straight onramps, this off I-84 (https://www.google.com/maps/dir/42.0486084,-72.1238389/42.0344528,-72.1331646/@42.0408153,-72.1316002,14.85z/data=!4m2!4m1!3e0?hl=en-US) certainly takes the cake.
Kennesaw GA: Wade Green Rd to I-75 NB. https://www.google.com/maps/@34.0589568,-84.600005,16.03z?hl=en-US
Quote from: Big John on April 04, 2021, 12:47:31 PM
Kennesaw GA: Wade Green Rd to I-75 NB. https://www.google.com/maps/@34.0589568,-84.600005,16.03z?hl=en-US
That's since been changed with construction of the tolled express lanes. It's much shorter now.
(https://uploads.tapatalk-cdn.com/20210404/aa2fc3e3e05dc4ede78efc6257f4e50c.jpg)
Does something like this count? Does this constitute an off ramp? When it is a freeway terminus/merge with only one option after it's last exit. This is the new terminus of US 175. After the SM Wright exit, WB 175 only moves to NB I-45.
iPhone
The caveat of no toll roads is a slight to one that is a legit "ramp" between 2 toll roads. I-294 NB to WB I-88 and the reverse in Hillside. Over 1.7 miles.
I-95 South to I-595 West: 3.2 miles on a lane that's longer than some entire 3dis. (Once you take Exit 26, you can't return to I-95.)
(https://uploads.tapatalk-cdn.com/20210405/63d122f3c27993a326bdc2f288bd432b.jpg)
This one might be the longest in Houston:
US 290 EB to I-10 EB (3 miles long) (https://www.google.com/maps/dir/29.8152851,-95.4644916/29.7787286,-95.4496895/@29.7893458,-95.4561891,8051m/data=!3m1!1e3!4m2!4m1!3e0)
Quote from: cpzilliacus on April 04, 2021, 10:24:56 AM
Not mentioned in either thread are these:
MD-198 westbound to I-95 southbound in Laurel, Maryland (https://www.google.com/maps/dir/39.102231,-76.8765701/39.0897634,-76.8939634/@39.0956627,-76.8952453,15z/data=!4m2!4m1!3e0)
I-405 southbound to I-105 eastbound near LAX (https://www.google.com/maps/dir/33.937822,-118.3686239/33.9315242,-118.3690691/33.9296726,-118.3662797/33.9324723,-118.3586622/@33.9337919,-118.369155,16z/data=!4m2!4m1!3e0) (this one is metered)
I was going to mention the "opposite" ramp of the Maryland example - I-95 northbound to MD 198 eastbound - which is even longer (about three miles), but then figured it would probably be disqualified as it ends up being a C/D ramp (as it can return to northbound I-95).
I-5 south to 205 north in Tualatin clocks in at 1.2 miles.
Also I'm fairly certain that that one has been mentioned in another thread.
I-865 :bigass:
Also in Indianapolis, I-70 E to I-74/465 E. It's 1.3 miles between the last entrance from the ramp to I-70 E and the split between the I-465 directions.
Movement between US-169 and CSAH-101. The ramp is so long it has its own sub-exit for CSAH-21.
https://www.google.com/maps/dir/44.7831087,-93.4306408/44.782465,-93.3941516/@44.7827522,-93.4084104,5279m/data=!3m1!1e3!4m2!4m1!3e0
Quote from: Hwy 61 Revisited on April 04, 2021, 12:03:34 PM
For straight onramps, this off I-84 (https://www.google.com/maps/dir/42.0486084,-72.1238389/42.0344528,-72.1331646/@42.0408153,-72.1316002,14.85z/data=!4m2!4m1!3e0?hl=en-US) certainly takes the cake.
On Street View, that looks to be a two-lane road for quite a bit.
Quote from: CtrlAltDel on April 05, 2021, 12:04:08 AM
Quote from: Hwy 61 Revisited on April 04, 2021, 12:03:34 PM
For straight onramps, this off I-84 (https://www.google.com/maps/dir/42.0486084,-72.1238389/42.0344528,-72.1331646/@42.0408153,-72.1316002,14.85z/data=!4m2!4m1!3e0?hl=en-US) certainly takes the cake.
On Street View, that looks to be a two-lane road for quite a bit.
It is. The single lane one way portion is less than 1,000 ft long at the end. Sure, there aren't technically any other driveways or intersections on the stretch Hwy 61 measured, but I certainly wouldn't consider it an onramp.
C/D roads kinda muddle this a bit, but US 3 in Nashua, NH has some contenders:
Exit 1 southbound offramp - 1.1 mi (https://goo.gl/maps/wKREdNB2YaKcNrCz9)
(MA) Exit 91 northbound onramp - 2.0 mi (https://goo.gl/maps/s9m2G2HGdoH8yPGt8)
There's also the southern I-93/293/NH 101 interchange in Manchester: https://goo.gl/maps/yG7ikcxJKcQDLnwT7
And the ramp from I-95 northbound to NH 16 northbound in Portsmouth: https://goo.gl/maps/TV6g7Cedqco36zi49 (1.8 mi)
I assume it would be cheating to include the Scarborough Connector (https://goo.gl/maps/LoVPgxJQZutBBVy6A) in Maine. ;-)
Quote from: jmacswimmer on April 04, 2021, 11:34:29 AM
(Those with better knowledge can correct me, but I'm under the impression the design of these ramps is a relic from when I-95 was to be routed around Richmond? The NB ramp especially, which is striped for 2 lanes but appears to be wide enough for 4 lanes (https://www.google.com/maps/@37.6639137,-77.4475684,3a,37.5y,348.25h,84.58t/data=!3m6!1e1!3m4!1snvllxvQBD1HlSYJmyWikWg!2e0!7i16384!8i8192?hl=en), seems to hint at this.)
Yes.
PA 332 to 295 EB(NB) in Lower Makefield township, PA has a rather large loop ramp that Google Maps is saying is 1/2 a mile. It feels like it's huge when you're on it.
https://www.google.com/maps/dir/40.234387,-74.8813622/40.2340696,-74.8818236/@40.2333936,-74.8809937,17.5z/data=!4m2!4m1!3e0
Quote from: Zeffy on April 05, 2021, 11:32:30 AM
PA 332 to 295 EB(NB) in Lower Makefield township, PA has a rather large loop ramp that Google Maps is saying is 1/2 a mile. It feels like it's huge when you're on it.
https://www.google.com/maps/dir/40.234387,-74.8813622/40.2340696,-74.8818236/@40.2333936,-74.8809937,17.5z/data=!4m2!4m1!3e0
This reminded me of another one: MD 2 SB to I-695 EB south of Baltimore (https://www.google.com/maps/dir/39.2032576,-76.6140404/39.205572,-76.6191972/@39.2043865,-76.616512,1005m/data=!3m1!1e3!4m2!4m1!3e0!5m1!1e1?hl=en) - large enough that a shopping center is inside the cloverleaf!
Westbound I-10 to southbound FL-23 is a 1.8-mile long ramp. (https://www.google.com/maps/dir/30.3078633,-81.8676441/30.2974358,-81.8792665/@30.3056102,-81.8773244,15.5z/data=!4m2!4m1!3e0) While the OP excluded toll roads and FL-23 is a toll road, I've listed it anyway because it was constructed as a fully-ORT facility and there's nothing "toll road specific" about the interchange design–it's just a really long ramp.
Quote from: 1995hoo on April 05, 2021, 12:28:39 PM
Westbound I-10 to southbound FL-23 is a 1.8-mile long ramp. (https://www.google.com/maps/dir/30.3078633,-81.8676441/30.2974358,-81.8792665/@30.3056102,-81.8773244,15.5z/data=!4m2!4m1!3e0) While the OP excluded toll roads and FL-23 is a toll road, I've listed it anyway because it was constructed as a fully-ORT facility and there's nothing "toll road specific" about the interchange design–it's just a really long ramp.
Wow. That's just a big interchange in general, probably one of the largest cloverleafs I've ever seen (compare the loop sizes to the nearby Chaffee Road interchange, for example).
The connection to US 90 is also interesting, presumably it was designed that way to allow for a future northbound extension of FL-23.
I've always thought the eastern end of the Polk Parkway in Lakeland, FL had a huge loop ramp:
I-4 WB to FL 570 SB (1 mile long) (https://www.google.com/maps/dir/28.1542404,-81.8479724/28.1544177,-81.8467346/@28.153528,-81.8489266,2313m/data=!3m1!1e3!4m2!4m1!3e0)
Quote from: formulanone on April 04, 2021, 08:37:26 PM
I-95 South to I-595 West: 3.2 miles on a lane that's longer than some entire 3dis. (Once you take Exit 26, you can't return to I-95.)
(https://uploads.tapatalk-cdn.com/20210405/63d122f3c27993a326bdc2f288bd432b.jpg)
Back in the days before GPS, I once tried to access 595 from 736, but I was not able to, and so I had to travel down a bit further and double back. Now I know why.
The longest offramps in SoCal:
The Firestone Blvd offramp from the 605 n/b is 9/10ths of a mile long.
The Century Blvd offramp from the 405 n/b is 1.1 miles long.
The La Cienega Blvd offramp from the 405 n/b is 1.2 miles long.
The Imperial Highway e/b offramp from the 405 s/b is 1.6 miles long.
KPCC's Offramp radio program is 49 minutes long.
Some long NorCal examples:
Alemany Maze, San Francisco
- US 101 north to I-280 north/I-280 south to US 101 south, about 0.8 mile
https://www.google.com/maps/dir/37.7256378,-122.4018352/37.7365759,-122.4035067/@37.7331256,-122.4089485,18z/data=!4m2!4m1!3e0
- US 101 north to I-280 south (in the same ramp complex)
https://www.google.com/maps/dir/37.7256378,-122.4018352/37.7336216,-122.41176/@37.7281875,-122.4158139,15z/data=!4m2!4m1!3e0
- I-280 north to Cesar Chavez (Army) Street. 0.6 miles long
https://www.google.com/maps/dir/37.7430685,-122.3967389/37.7498776,-122.3923004/@37.7430069,-122.3970986,20z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.3967457!2d37.7430994!3s0x808f7faa33bcac13:0xa42eadb57840c4f4!1m0!3e0
San Francisco International Airport
- US 101 south to SFO, 1.9 miles
https://www.google.com/maps/dir/37.6373054,-122.4046866/37.6145443,-122.3928695/@37.6303659,-122.4176733,15z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.4037029!2d37.6334908!3s0x808f79d31ba90a0f:0xfc0c1949e1a98bf!1m0!3e0
- I-380 east to SFO (shared with above ramp), 2 miles
https://www.google.com/maps/dir/37.6338166,-122.4109707/37.6145443,-122.3928695/@37.6266534,-122.4128968,15z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.4041392!2d37.633247!3s0x808f79d266a7ba49:0xe2c10341702ba369!1m0!3e0
- SFO to I-380 west, 2 miles
https://www.google.com/maps/dir/37.6147596,-122.393454/37.6342734,-122.4115633/@37.5825502,-122.4255815,15z/data=!4m2!4m1!3e0
- I-280 south to San Bruno Avenue, 0.7 miles
https://www.google.com/maps/dir/37.6317857,-122.4369861/37.6241043,-122.4288966/@37.6275032,-122.4347545,16z/data=!4m2!4m1!3e0
- I-680 south to US 101 south in San Jose, 1.4 miles
https://www.google.com/maps/dir/37.3442738,-121.8454671/37.3295925,-121.8424148/@37.3440666,-121.8450287,17z/data=!4m2!4m1!3e0
- I-80 east to I-880 south (MacArthur Maze) in Oakland, 1.6 miles.
https://www.google.com/maps/dir/37.8232347,-122.3169174/37.8156239,-122.2998573/@37.8334997,-122.3541215,14z/data=!4m2!4m1!3e0
- Route 92 east to I-880 north in Hayward, 1.2 miles
https://www.google.com/maps/dir/37.6346492,-122.1040562/37.6473967,-122.0954848/@37.6349005,-122.1002164,17z/data=!4m2!4m1!3e0
- I-238 west to I-880 south, San Lorenzo, 1.2 miles
https://www.google.com/maps/dir/37.6897775,-122.1198918/37.68547,-122.1307131/@37.6895012,-122.1313276,16z/data=!4m2!4m1!3e0
Some from Metro Detroit:
I-75 to US-24 (Telegraph exit 35) 1.5 miles https://www.google.com/maps/dir/42.1860214,-83.2433016/42.194183,-83.2669105/@42.1907768,-83.2627532,15.5z/data=!4m2!4m1!3e0?hl=en
I-94 to M-3 (Gratiot Exit 231) 0.6 miles https://www.google.com/maps/dir/42.5190415,-82.9170189/42.5278737,-82.9164124/@42.5254528,-82.9213739,16.5z/data=!4m2!4m1!3e0?hl=en
I-75 to M-3 (Gratiot Exit 51B via northbound I-75) 0.7 Miles https://www.google.com/maps/dir/42.3412948,-83.0494744/42.3461043,-83.0369197/@42.3450622,-83.0423805,16.75z/data=!4m2!4m1!3e0?hl=en
A former on ramp is I-94 at M-59 (Hall Rd) The on ramp was replaced in the 90s with a shorter on ramp for WB-94. Before I-94, it was a part of M-29. The remains of the old on ramp is here: https://www.google.com/maps/@42.6261992,-82.8576826,1097m/data=!3m1!1e3?hl=en
I-90 to I-55 north in Chicago is long.
https://www.google.com/maps/dir/41.8572844,-87.644388/41.8473593,-87.6323815/@41.8511685,-87.6418855,1362m/data=!3m1!1e3
other way is just as long
https://www.google.com/maps/dir/41.8475243,-87.6318523/41.8554742,-87.6443616/@41.8523112,-87.6424693,1668m/data=!3m1!1e3!4m2!4m1!3e0
NB I-75 to WB I-69 in Flint is another long one
GA 316 to Pleasant Hill Road, 2.2 miles (https://www.google.com/maps/dir/33.9644687,-84.0960264/33.9528431,-84.1302222/@33.9571545,-84.1202097,2403m/data=!3m1!1e3!4m2!4m1!3e0).
Long SoCal ramps (excluding one mentioned in the 2015 thread, the Route 55/I-5 connector)
1 mile, I-405 south to I-710 north in Long Beach
https://www.google.com/maps/dir/33.8251333,-118.2182979/33.8345421,-118.208551/@33.8323925,-118.2211637,16z/data=!4m2!4m1!3e0
1.1 miles, I-110 north to I-10 west in Los Angeles
https://www.google.com/maps/dir/34.0329651,-118.2745082/34.037834,-118.280996/@34.0368182,-118.2746151,17z/data=!4m2!4m1!3e0
1.1 miles, I-405 south to Route 22 west near Seal Beach
https://www.google.com/maps/dir/33.7863615,-118.093945/33.7744061,-118.0954916/@33.7824321,-118.0923588,17z/data=!4m2!4m1!3e0
1.4 miles, Route 22 east to I-405 north
https://www.google.com/maps/dir/33.7742163,-118.0939523/33.7881844,-118.0959757/@33.7812647,-118.0913301,17z/data=!4m2!4m1!3e0
1.8 miles, Route 91 west in Carson to I-405 north in Gardena via I-110 south
https://www.google.com/maps/dir/33.8727822,-118.2739738/33.85906,-118.2890761/@33.863992,-118.2858717,16z/data=!4m2!4m1!3e0
Quote from: SkyPesos on April 04, 2021, 11:01:20 PM
I-865 :bigass:
Also in Indianapolis, I-70 E to I-74/465 E. It's 1.3 miles between the last entrance from the ramp to I-70 E and the split between the I-465 directions.
miles
Sorry, it's MUCH longer than that - 3.48 miles from the Gore Point of EB exit 69 to the Gore Point of the split where you can access the remainder of the ramps - to either Northbound I-465 (increasing Reference Post direction) and Westbound I-74 or Southbound I-465 (decreasing Reference Post direction) and Eastbound I-74.
Quote from: SSR_317 on April 10, 2021, 06:57:45 PM
Quote from: SkyPesos on April 04, 2021, 11:01:20 PM
I-865 :bigass:
Also in Indianapolis, I-70 E to I-74/465 E. It's 1.3 miles between the last entrance from the ramp to I-70 E and the split between the I-465 directions.
miles
Sorry, it's MUCH longer than that - 3.48 miles from the Gore Point of EB exit 69 to the Gore Point of the split where you can access the remainder of the ramps - to either Northbound I-465 (increasing Reference Post direction) and Westbound I-74 or Southbound I-465 (decreasing Reference Post direction) and Eastbound I-74.
I forgot about the points past the I-465 directional split :pan:
If you count from the same starting point I had (gore of last entrance ramp to I-70 E), to where it merges with I-465 N, that will be 2 miles. Here's why I started measuring from the last I-70 E entrance ramp instead of from the gore of Exit 69:
Quote from: MCRoads on April 03, 2021, 08:05:36 PM
4: Any C/D road needed to get to/from the ramp does not count in the final distance. A C/D road is any ramp that, one you exit, you have a choice to merge back onto the road you just exited. No exceptions here.
1.7 miles off I-93 coming into Boston. Even has its own wikipedia page.
https://en.wikipedia.org/wiki/Leverett_Circle_Connector_Bridge
I-84 WB to I-384 EB in Manchester, CT, is 1.8 miles. There are C/D ramps in that complex, but this is not one of them; you cannot get back to I-84
What about in Milwaukee, from College Ave, you the ramp to I-43/41/894 is about 2.55 miles from College Ave until you're on the main lanes of 43/41/894.
Quote from: SkyPesos on April 10, 2021, 08:17:06 PM
Quote from: SSR_317 on April 10, 2021, 06:57:45 PM
Quote from: SkyPesos on April 04, 2021, 11:01:20 PM
I-865 :bigass:
Also in Indianapolis, I-70 E to I-74/465 E. It's 1.3 miles between the last entrance from the ramp to I-70 E and the split between the I-465 directions.
miles
Sorry, it's MUCH longer than that - 3.48 miles [note: later corrected to 3.4458 miles - see reply below] from the Gore Point of EB exit 69 to the Gore Point of the split where you can access the remainder of the ramps - to either Northbound I-465 (increasing Reference Post direction) and Westbound I-74 or Southbound I-465 (decreasing Reference Post direction) and Eastbound I-74.
I forgot about the points past the I-465 directional split :pan:
If you count from the same starting point I had (gore of last entrance ramp to I-70 E), to where it merges with I-465 N, that will be 2 miles. Here's why I started measuring from the last I-70 E entrance ramp instead of from the gore of Exit 69:
Quote from: MCRoads on April 03, 2021, 08:05:36 PM
4: Any C/D road needed to get to/from the ramp does not count in the final distance. A C/D road is any ramp that, one you exit, you have a choice to merge back onto the road you just exited. No exceptions here.
I would argue with "rule 4", because in this situation drivers have NO OTHER OPTION but to use Exit 69 if they want to get from EB I-70 to I-465/I-74. While it is true that vehicles taking exit 69 CAN merge back onto EB I-70 from this C/D (for traffic that entered it from Ameriplex Pkwy), there is no other exit point from the EB mainline until subsequent exit 75's ramp to EB Sam Jones Expwy (Raymond St). Thus, I believe the entire length of this "pseudo C/D" should count as part of these ramps.
BTW, I have seen a fool dangerously exit mainline I-70 and dart across the 2 re-entering lanes of the C/D in order to get to the I-465/I-74 ramps he missed back at Exit 69. The right median barrier openings and paved shoulders that exist at that point can sadly facilitate this reckless movement as there are no roadway structures present to prevent it. IMHO this was poor design, but I can see why it occurred.
Regardless, here are the calculations I came up with (all distances cumulative):
Feet Miles Point 0 0.0000 Gore Point on EB-70 for Exit 69 (right 2 lanes become a Collector/Distributor)
1,605 0.3040 under G/S (Grade Separation) for Ramp from EB-I-70 to IND Airport (accessed from Exit 68)
3,036 0.5750 Merge (Reverse Gore Point) with Ramp from Ameriplex Pkwy (2 lanes added from Right - C/D now 4 lanes wide)
3,656 0.6924 [on separate Ramp to the Left from IND Airport] Gore Point between Ramp to EB I-70 & Ramp to the C/D
5,047 0.9559 Left Reverse Gore Point of Ramp from IND Airport (2 lanes added from Left - C/D now 6 lanes wide)
5,486 1.0390 C/D Lane #6 drops (end striping)
6,546 1.2398 C/D Lane #6 ends
6,676 1.2644 Dynamic Message Sign (DMS) over C/D lanes #2 thru #4
8,323 1.5763 C/D Lane #5 drops (end striping)
9,240 1.7500 C/D Lane #5 ends
10,022 1.8981 [future] C/L for G/S undercrossing of proposed IND Airport taxiway
11,417 2.1623 Right Median Barrier ends (between EB mainline & parallel C/D)
11,568 2.1909 Gore Point: Ramp to I-465/I-74 = lanes #3 & #4 leave C/D (lanes #1 & #2) on the Right
12,548 2.3765 [on EB I-70 mainline] Merge of C/D - add Mainline Lane #4 & Lane #5 on the Right
12,692 2.4038 Right Median Barrier resumes (between EB mainline & parallel ramp to I-465/I-74)
14,158 2.6814 I-70 Reference Post 72 (on barrier between EB mainline & parallel ramp)
17,673 3.3472 under G/S at C/L (centerline) of High School Rd
18,194 3.4458 Gore Point on Ramp to I-465/I-74: Ramp Lanes #1 & #2 to NB I-465/WB I-74; Ramp Lane #3 to SB-I-465/EB I-74
[on Ramp to NB I-465/WB I-74 (2 lanes)]
18,194 3.4458 Gore Point for Ramp to SB I-465/EB I-74 (Ramp Lane #3 leaves to Right)
19,183 3.6331 above I-465 (at C/L) on G/S
19,799 3.7498 above C/L of Box Culvert for drainage channel
20,112 3.8091 under C/L of EB I-70 on G/S above
20,164 3.8189 C/L of I-70 above (theoretical)
20,210 3.8277 under C/L of WB I-70 on G/S above
20,234 3.8322 under Loop Ramp [WB I-70 to SB I-465] above (common G/S with WB I-70)
20,948 3.9674 past (barrier protected) IND Airport Landing Light Beacon for Runway 32 (to Right, between this ramp and Ramp from WB I-70 to NB I-465)
21,354 4.0443 Merge with Ramp from WB I-70 (add Ramp Lane #3 on the Right)
21,791 4.1271 Ramp Lane #3 drops (end striping)
22,104 4.1864 Ramp Lane #3 ends
22,398 4.2420 Left Merge onto mainline NB I-465/WB I-74; add Mainline Lanes #5 & #6 on the Right)
[on Ramp to SB I-465/ EB I-74 (1 lane)]
18,194 3.4458 Left Gore Point for Ramp to NB I-465/WB I-74 (Ramp Lanes #1 & #2 leave to Left)
19,398 3.6739 Left Merge with Loop Ramp from WB I-70; add Ramp Lane #1 to Left (Ramp now 2 lanes wide)
20,177 3.8214 Left Merge onto mainline SB I-465/EB I-74: add Mainline Lanes #4 & #5 on the Right)
These figures were obtained from detailed analysis of Google Maps images.
Quote from: jmacswimmer on April 05, 2021, 12:13:12 PM
This reminded me of another one: MD 2 SB to I-695 EB south of Baltimore (https://www.google.com/maps/dir/39.2032576,-76.6140404/39.205572,-76.6191972/@39.2043865,-76.616512,1005m/data=!3m1!1e3!4m2!4m1!3e0!5m1!1e1?hl=en) - large enough that a shopping center is inside the cloverleaf!
The opposite movement is also quite long - Inner Loop I-695 to MD-2 north (https://www.google.com/maps/dir/39.206438,-76.591688/39.2075189,-76.6143058/@39.205315,-76.6137349,15z/data=!4m2!4m1!3e0) requires a very early exit and results in a ramp that is about 1.3 miles long.
The FL TOLL 417 to US 17 & 92 ramp in Sanford, FL is very long as that used to be the north terminus of FL 417. It also features a shopping center within it.
https://www.google.com/maps/@28.775077,-81.2842455,15.15z
The longest regular on-ramp (from a non-freeway road) that comes to mind in the South Puget Sound region of Washington State is the southbound onramp to I-5 from Marvin Road (the new DDI) in Lacey, just outside Olympia.
It is not shown on Google Maps, as the satellite imagery is just barely too old. But you can see the shape of the ramp here (https://www.google.com/maps/@47.0628379,-122.7733868,507m/data=!3m1!1e3), including what will be a RIRO into the shopping center to the north.
It is designed as a collector road, but currently operates as a regular on-ramp while other ramp connections remain unbuilt. The on-ramp doesn't merge onto southbound I-5 until right about here (https://goo.gl/maps/WHQzsVDHQ7MFXYbG9). About 1.3 miles. Long enough that you see people overtaking each other, as it's two lanes until right before the merge.
Quote from: cpzilliacus on April 13, 2021, 11:37:06 AM
Quote from: jmacswimmer on April 05, 2021, 12:13:12 PM
This reminded me of another one: MD 2 SB to I-695 EB south of Baltimore (https://www.google.com/maps/dir/39.2032576,-76.6140404/39.205572,-76.6191972/@39.2043865,-76.616512,1005m/data=!3m1!1e3!4m2!4m1!3e0!5m1!1e1?hl=en) - large enough that a shopping center is inside the cloverleaf!
The opposite movement is also quite long - Inner Loop I-695 to MD-2 north (https://www.google.com/maps/dir/39.206438,-76.591688/39.2075189,-76.6143058/@39.205315,-76.6137349,15z/data=!4m2!4m1!3e0) requires a very early exit and results in a ramp that is about 1.3 miles long.
It also produces the anomaly of the exit numbers appearing in the order: 1 3 2 4 when heading westbound from the Key bridge.
I-84 EB to US-93 SB near Twin Falls, ID is 1.5 miles long. Map (https://www.google.com/maps/dir/42.6468641,-114.460002/42.6281629,-114.4484953/@42.6396343,-114.4569951,4557m/data=!3m1!1e3!4m2!4m1!3e0)
I-77 Exit 1 (SB only exit) to US 21/176/321 (Charleston Hwy.) in Cayce, SC. It flies directly over the I-26/I-77 junction and past the southern terminus of I-77 to reach Charleston Hwy and Fish Hatchery Rd at a 4-way traffic signal. I'd say the whole ramp is at least a mile.
Some might say this ramp would make a good southern extension of I-77 in the general direction of Savannah, but the heavy residential areas directly past this ramp on Fish Hatchery Rd would very much disagree. As would I, since my neighborhood is a few miles off of Fish Hatchery.
The on-ramp from this intersection back to I-77 north is a bit shorter, as it is straighter and it meets the ramp from I-26 east before meeting the ramp from I-26 west. So only the Exit 1 off-ramp qualifies.
The ramp from I-57 N to I-294 N is 2.0 miles long (https://www.google.com/maps/dir/41.6106315,-87.6969741/41.6320077,-87.6969899/@41.619894,-87.6950425,4373m/data=!3m1!1e3!4m2!4m1!3e0).
Also, the ramp from I-290/IL-53 N to I-90 W extends 2.2 miles (https://www.google.com/maps/dir/42.0582957,-88.0279727/42.062022,-88.0626489/@42.0589185,-88.0475687,3983m/data=!3m1!1e3!4m2!4m1!3e0).
The Illinois Tollway has been making ramps longer and longer (but not specifically because of the tolls, so I find them worthy of mention).
Quote from: CtrlAltDel on April 15, 2021, 03:44:48 AM
The ramp from I-57 N to I-294 N is 2.0 miles long (https://www.google.com/maps/dir/41.6106315,-87.6969741/41.6320077,-87.6969899/@41.619894,-87.6950425,4373m/data=!3m1!1e3!4m2!4m1!3e0).
Also, the ramp from I-290/IL-53 N to I-90 W extends 2.2 miles (https://www.google.com/maps/dir/42.0582957,-88.0279727/42.062022,-88.0626489/@42.0589185,-88.0475687,3983m/data=!3m1!1e3!4m2!4m1!3e0).
For these examples, along with several others that have been mentioned, I'm not sure I'd really call it a ramp for its full length. More like a ramp that joins or forms a service or C/D road and then parallels the freeway for a while before joining.
In Ohio, one of the longest on-ramps that jogs in my mind is from CR-18/Mahoning Avenue to the Ohio Turnpike/I-76 East /I-80 West near Youngstown. From EB Mahoning to EB I-76, the total "ramp" mileage is +/- 2.2 miles.
This also counts when the Mahoning ramp merges into the free I-76 on-ramp to the Turnpike toll plaza, and the ramp from the toll plaza to the EB mainline Turnpike.
https://www.google.com/maps/place/Youngstown,+OH/@41.1072688,-80.8357521,14.84z/data=!4m5!3m4!1s0x8833e1d16893bc9f:0x5d2c726a0cccf044!8m2!3d41.0997803!4d-80.6495194
http://www.gribblenation.org/2019/07/california-state-route-244-and-un-built.html?m=1
I-80 to CA-244 gets viewed as the longest freeway ramp in the Sacramento area at 1.08 miles long.
However this ramp was originally planned to be part of a proposed now cancelled of the Beltline freeway extension.
Quote from: CtrlAltDel on April 05, 2021, 04:37:59 PM
Quote from: formulanone on April 04, 2021, 08:37:26 PM
I-95 South to I-595 West: 3.2 miles on a lane that's longer than some entire 3dis. (Once you take Exit 26, you can't return to I-95.)
(https://uploads.tapatalk-cdn.com/20210405/63d122f3c27993a326bdc2f288bd432b.jpg)
Back in the days before GPS, I once tried to access 595 from 736, but I was not able to, and so I had to travel down a bit further and double back. Now I know why.
The original ramp was a little shorter, but blocked off I-595 access from SR 736. The ramps were modified again in 1993-94 which allows southbound access to I-95 and to I-595, which would knock off a few tenths from that long ramp. There's no way to get back into I-95 south without reversing (though once I was directed to make a U-turn up the Davie Road ramp and avoid a mess).
I don't know whether this is the longest in Colorado, but the I-76 EB to I-25 NB ramp is 1.5 miles long, maybe a bit longer.
https://tinyurl.com/longramp
BUMP!
Found a contender for the longest ramp ever! Exit 294 from I-15 to WB I-215 in SLC: 4 miles!
EB I-96 on ramp to EB I-69 is quite long. I believe it's just over 2 miles.
Quote from: Terry Shea on September 06, 2022, 04:03:06 AM
EB I-96 on ramp to EB I-69 is quite long. I believe it's just over 2 miles.
That is a long one. If we're measuring to the painted gore nose like the other one, then it is 2.5 miles.
Funny seeing I-69 EB, but this segment is posted that way. I'm somehow guessing that's been discussed on this forum before.
Quote from: MCRoads on September 05, 2022, 08:12:37 PM
BUMP!
Found a contender for the longest ramp ever! Exit 294 from I-15 to WB I-215 in SLC: 4 miles!
If I encountered that for the first time, I'd swear the signs were lying to me.
Quote from: formulanone on September 08, 2022, 07:18:33 AM
Quote from: MCRoads on September 05, 2022, 08:12:37 PM
BUMP!
Found a contender for the longest ramp ever! Exit 294 from I-15 to WB I-215 in SLC: 4 miles!
If I encountered that for the first time, I'd swear the signs were lying to me.
Except that it's more of a service road than a ramp, and you'd know what you were in for when you saw
this sign (https://goo.gl/maps/LhsQ72KcqfenTSzZ7).
Quote from: formulanone on September 08, 2022, 07:18:33 AM
Quote from: MCRoads on September 05, 2022, 08:12:37 PM
BUMP!
Found a contender for the longest ramp ever! Exit 294 from I-15 to WB I-215 in SLC: 4 miles!
If I encountered that for the first time, I'd swear the signs were lying to me.
That was reconstructed just last year - creating essentially a very long C/D ramp in order to alleviate the awful weaving and congestion that was an everyday occurrence between 90th South and 215 with the 72nd South interchange in the middle. In my experience, it has worked wonders. Only interesting thing about it is that once you're on it, there's no easy way to get back on 15.
The funny thing is that going north, you now pass exit 295 before you cross the roads that 294 goes to (294A for 72nd South, 294B-C for I-215). Those exits are still in order going southbound... but as 298A-B for I-215 and 297 for 72nd South.
Quote from: US 89 on September 08, 2022, 08:36:11 AM
Quote from: formulanone on September 08, 2022, 07:18:33 AM
Quote from: MCRoads on September 05, 2022, 08:12:37 PM
BUMP!
Found a contender for the longest ramp ever! Exit 294 from I-15 to WB I-215 in SLC: 4 miles!
If I encountered that for the first time, I'd swear the signs were lying to me.
That was reconstructed just last year - creating essentially a very long C/D ramp in order to alleviate the awful weaving and congestion that was an everyday occurrence between 90th South and 215 with the 72nd South interchange in the middle. In my experience, it has worked wonders. Only interesting thing about it is that once you're on it, there's no easy way to get back on 15.
The funny thing is that going north, you now pass exit 295 before you cross the roads that 294 goes to (294A for 72nd South, 294B-C for I-215). Those exits are still in order going southbound... but as 298A-B for I-215 and 297 for 72nd South.
I thought it was a CD road as well, but it actually isn't! Once you get off I-15 on exit 194, you cannot re-enter the highway! For a ramp this long, I would personally put a "NO RE-ENTRY" placard on the sign, but I don't know if such a thing exists.
Quote from: MCRoads on September 08, 2022, 10:56:46 AM
For a ramp this long, I would personally put a "NO RE-ENTRY" placard on the sign, but I don't know if such a thing exists.
Why? You only realize how long it is after you're already on it, at which point the whole "no re-entry" part is just like any other system interchange ramp.
Quote from: kphoger on September 08, 2022, 11:23:10 AM
Quote from: MCRoads on September 08, 2022, 10:56:46 AM
For a ramp this long, I would personally put a "NO RE-ENTRY" placard on the sign, but I don't know if such a thing exists.
Why? You only realize how long it is after you're already on it, at which point the whole "no re-entry" part is just like any other system interchange ramp.
I guess. Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction. But I'm sure there is already a thread where this is described in more detail.
I do believe I found the longest ramp in Colorado: I-25 NB to I-70 WB. 1.6 miles.
Quote from: MCRoads on September 08, 2022, 11:56:14 AM
Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction.
Precisely.
Like this (https://goo.gl/maps/ngKggFvhuaepEA13A).
Quote from: kphoger on September 08, 2022, 12:24:51 PM
Quote from: MCRoads on September 08, 2022, 11:56:14 AM
Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction.
Precisely. Like this (https://goo.gl/maps/ngKggFvhuaepEA13A).
Or
this (https://goo.gl/maps/MwPgqJZGestvo2h86). But I wouldn't have any issue with this type of sign being used at the Utah example.
I suppose it isn't only an exit ramp, now that I'm looking at it closely. Technically, 1.6 miles of it also serves as a connector road (https://goo.gl/maps/XiE9Zv4tDUb4cnxQ8) between 9000 South and 7200 South.
Does this disqualify it?
Quote from: kphoger on September 08, 2022, 07:26:36 PM
I suppose it isn't only an exit ramp, now that I'm looking at it closely. Technically, 1.6 miles of it also serves as a connector road (https://goo.gl/maps/XiE9Zv4tDUb4cnxQ8) between 9000 South and 7200 South.
Does this disqualify it?
I'd say it's a C-D road. I-215 exit doesn't start until the 7200 exit has split off. But I'm not the OP...
Quote from: davewiecking on September 08, 2022, 07:32:56 PM
Quote from: kphoger on September 08, 2022, 07:26:36 PM
I suppose it isn't only an exit ramp, now that I'm looking at it closely. Technically, 1.6 miles of it also serves as a connector road (https://goo.gl/maps/XiE9Zv4tDUb4cnxQ8) between 9000 South and 7200 South.
Does this disqualify it?
I'd say it's a C-D road. I-215 exit doesn't start until the 7200 exit has split off. But I'm not the OP...
But it's only a C/D road if it connects back to I-15.. and around we go.
Quote from: webny99 on September 08, 2022, 07:15:12 PM
Quote from: kphoger on September 08, 2022, 12:24:51 PM
Quote from: MCRoads on September 08, 2022, 11:56:14 AM
Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction.
Precisely. Like this (https://goo.gl/maps/ngKggFvhuaepEA13A).
Or this (https://goo.gl/maps/MwPgqJZGestvo2h86). But I wouldn't have any issue with this type of sign being used at the Utah example.
I would. We don't put "no re-entry" signs at every system interchange exit, do we? Putting a sign like that would probably cause more confusion than it's worth.
Plus you can use the 72nd South exit to get back on mainline 15. It's just a little more complicated than "exit and drive straight through" because it's a SPUI, so you have to turn right and then u-turn at the first legal point. Those signs should be reserved for interchanges where there is no ramp from a surface cross street back to the interstate in the same direction, as is the case with both of the signs linked above.
Quote from: US 89 on September 09, 2022, 09:31:53 AM
Quote from: webny99 on September 08, 2022, 07:15:12 PM
Quote from: kphoger on September 08, 2022, 12:24:51 PM
Quote from: MCRoads on September 08, 2022, 11:56:14 AM
Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction.
Precisely. Like this (https://goo.gl/maps/ngKggFvhuaepEA13A).
Or this (https://goo.gl/maps/MwPgqJZGestvo2h86). But I wouldn't have any issue with this type of sign being used at the Utah example.
I would. We don't put "no re-entry" signs at every system interchange exit, do we? Putting a sign like that would probably cause more confusion than it's worth.
Plus you can use the 72nd South exit to get back on mainline 15. It's just a little more complicated than "exit and drive straight through" because it's a SPUI, so you have to turn right and then u-turn at the first legal point. Those signs should be reserved for interchanges where there is no ramp from a surface cross street back to the interstate in the same direction, as is the case with both of the signs linked above.
How would it create more confusion? It's different than a regular system interchange ramp because it's way longer, obviously, plus as kphoger mentioned it's used to connect between 9000 South and 7200 South. So it's basically like a C/D road with no re-entry, and I don't see how that's different than a regular off-ramp with no re-entry. In both cases, you would expect there to be re-entry. The only reason there's not here is because both sets of SPUI ramps are
inside the 215 access road, so they have their own ramps to 15 NB in place of what would normally be a slip ramp from the C/D road.
Quote from: US 89 on September 09, 2022, 09:31:53 AM
I would. We don't put "no re-entry" signs at every system interchange exit, do we? Putting a sign like that would probably cause more confusion than it's worth.
Plus you can use the 72nd South exit to get back on mainline 15. It's just a little more complicated than "exit and drive straight through" because it's a SPUI, so you have to turn right and then u-turn at the first legal point. Those signs should be reserved for interchanges where there is no ramp from a surface cross street back to the interstate in the same direction, as is the case with both of the signs linked above.
Quote from: webny99 on September 09, 2022, 09:58:09 AM
How would it create more confusion? It's different than a regular system interchange ramp because it's way longer, obviously, plus as kphoger mentioned it's used to connect between 9000 South and 7200 South. So it's basically like a C/D road with no re-entry, and I don't see how that's different than a regular off-ramp with no re-entry. In both cases, you would expect there to be re-entry. The only reason there's not here is because both sets of SPUI ramps are inside the 215 access road, so they have their own ramps to 15 NB in place of what would normally be a slip ramp from the C/D road.
1. It only serves as a C/D road for traffic
not coming from I-15. Therefore, its function in that regard is meaningless to traffic on I-15–which is where you're suggesting such a sign be placed. For I-15 traffic, it's simply an exit for two different roads, much like
the ramp (https://goo.gl/maps/qNnyYQrMGLMf5uff8) from SB I-135 to 29th/Hydraulic and EB K-96 here in Wichita.
2. Length doesn't matter (despite what your cousin told you in seventh grade). Drivers don't know the ramp is really long until they're already on it anyway.
3. A regular off-ramp with no
immediately apparent re-entry doesn't generally get additional signage. That's basically any old partial diamond interchange, such as SB I-135
at (https://goo.gl/maps/ip9i9fJUMdkJ71de9) Central here in Wichita. Examples like
Airport Rd (https://goo.gl/maps/acNA847kXoUjRDur6) in northern Oklahoma are more rare.
Quote from: webny99 on September 09, 2022, 09:58:09 AM
Quote from: US 89 on September 09, 2022, 09:31:53 AM
Quote from: webny99 on September 08, 2022, 07:15:12 PM
Quote from: kphoger on September 08, 2022, 12:24:51 PM
Quote from: MCRoads on September 08, 2022, 11:56:14 AM
Maybe a more apt use for a placard like that is if the exit you are taking does not allow for convenient re-entry on the same highway in the same direction.
Precisely. Like this (https://goo.gl/maps/ngKggFvhuaepEA13A).
Or this (https://goo.gl/maps/MwPgqJZGestvo2h86). But I wouldn't have any issue with this type of sign being used at the Utah example.
I would. We don't put "no re-entry" signs at every system interchange exit, do we? Putting a sign like that would probably cause more confusion than it's worth.
Plus you can use the 72nd South exit to get back on mainline 15. It's just a little more complicated than "exit and drive straight through" because it's a SPUI, so you have to turn right and then u-turn at the first legal point. Those signs should be reserved for interchanges where there is no ramp from a surface cross street back to the interstate in the same direction, as is the case with both of the signs linked above.
How would it create more confusion? It's different than a regular system interchange ramp because it's way longer, obviously, plus as kphoger mentioned it's used to connect between 9000 South and 7200 South. So it's basically like a C/D road with no re-entry, and I don't see how that's different than a regular off-ramp with no re-entry. In both cases, you would expect there to be re-entry. The only reason there's not here is because both sets of SPUI ramps are inside the 215 access road, so they have their own ramps to 15 NB in place of what would normally be a slip ramp from the C/D road.
Because the purpose behind those signs is to let the driver know they can't get back on the highway in the same direction they were going if they decide to exit there. It's not the same thing in this case. It's just a long exit ramp.
Quote from: SEWIGuy on September 09, 2022, 12:35:05 PM
Because the purpose behind those signs is to let the driver know they can't get back on the highway in the same direction they were going if they decide to exit there. It's not the same thing in this case. It's just a long exit ramp.
Right. The ability to re-enter I-15
in this manner (https://goo.gl/maps/EtyBJhgwFxDAT6Hx5) is functionally equivalent to being able to re-enter I-135
in this manner (https://goo.gl/maps/4GeJXCE3W1AWJxEy6).
Should there be a "no re-entry" sign at, say,
this exit (https://goo.gl/maps/uNiAzpQAYVB5MpfbA)? Or
this exit (https://goo.gl/maps/gG48ELvG71cnGhkz9)?
Quote from: TheStranger on April 07, 2021, 04:00:07 AM
Some long NorCal examples:
Alemany Maze, San Francisco
- US 101 north to I-280 north/I-280 south to US 101 south, about 0.8 mile
https://www.google.com/maps/dir/37.7256378,-122.4018352/37.7365759,-122.4035067/@37.7331256,-122.4089485,18z/data=!4m2!4m1!3e0
- US 101 north to I-280 south (in the same ramp complex)
https://www.google.com/maps/dir/37.7256378,-122.4018352/37.7336216,-122.41176/@37.7281875,-122.4158139,15z/data=!4m2!4m1!3e0
- I-280 north to Cesar Chavez (Army) Street. 0.6 miles long
https://www.google.com/maps/dir/37.7430685,-122.3967389/37.7498776,-122.3923004/@37.7430069,-122.3970986,20z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.3967457!2d37.7430994!3s0x808f7faa33bcac13:0xa42eadb57840c4f4!1m0!3e0
San Francisco International Airport
- US 101 south to SFO, 1.9 miles
https://www.google.com/maps/dir/37.6373054,-122.4046866/37.6145443,-122.3928695/@37.6303659,-122.4176733,15z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.4037029!2d37.6334908!3s0x808f79d31ba90a0f:0xfc0c1949e1a98bf!1m0!3e0
- I-380 east to SFO (shared with above ramp), 2 miles
https://www.google.com/maps/dir/37.6338166,-122.4109707/37.6145443,-122.3928695/@37.6266534,-122.4128968,15z/data=!4m9!4m8!1m5!3m4!1m2!1d-122.4041392!2d37.633247!3s0x808f79d266a7ba49:0xe2c10341702ba369!1m0!3e0
- SFO to I-380 west, 2 miles
https://www.google.com/maps/dir/37.6147596,-122.393454/37.6342734,-122.4115633/@37.5825502,-122.4255815,15z/data=!4m2!4m1!3e0
- I-280 south to San Bruno Avenue, 0.7 miles
https://www.google.com/maps/dir/37.6317857,-122.4369861/37.6241043,-122.4288966/@37.6275032,-122.4347545,16z/data=!4m2!4m1!3e0
- I-680 south to US 101 south in San Jose, 1.4 miles
https://www.google.com/maps/dir/37.3442738,-121.8454671/37.3295925,-121.8424148/@37.3440666,-121.8450287,17z/data=!4m2!4m1!3e0
- I-80 east to I-880 south (MacArthur Maze) in Oakland, 1.6 miles.
https://www.google.com/maps/dir/37.8232347,-122.3169174/37.8156239,-122.2998573/@37.8334997,-122.3541215,14z/data=!4m2!4m1!3e0
- Route 92 east to I-880 north in Hayward, 1.2 miles
https://www.google.com/maps/dir/37.6346492,-122.1040562/37.6473967,-122.0954848/@37.6349005,-122.1002164,17z/data=!4m2!4m1!3e0
- I-238 west to I-880 south, San Lorenzo, 1.2 miles
https://www.google.com/maps/dir/37.6897775,-122.1198918/37.68547,-122.1307131/@37.6895012,-122.1313276,16z/data=!4m2!4m1!3e0
I-880 south to CASR-237 west HOV-to-HOV connector physically joins the mainline much sooner, but logically (due to movement restrictions, etc) is close to 4 miles. I am sure that several HOV-to-HOV connectors, some of which have completely separate roadways, in Southern California are even longer still.
For the Cleveland area, I will chime in on two ramps:
- WB-I-480 to NB SR-176/Jennings Freeway
- SB SR-176 to EB I-480
Both are well over a mile long, and parallel I-480 for a bit before connecting to the Jennings Freeway.
Quote from: kphoger on September 09, 2022, 12:57:31 PM
Quote from: SEWIGuy on September 09, 2022, 12:35:05 PM
Because the purpose behind those signs is to let the driver know they can't get back on the highway in the same direction they were going if they decide to exit there. It's not the same thing in this case. It's just a long exit ramp.
Right. The ability to re-enter I-15 in this manner (https://goo.gl/maps/EtyBJhgwFxDAT6Hx5) is functionally equivalent to being able to re-enter I-135 in this manner (https://goo.gl/maps/4GeJXCE3W1AWJxEy6).
In most cases, the main reason for exiting a highway and then immediately re-entering would be for a fuel/food/restroom stop. That's obviously not the case when you're exiting to another freeway, but in the case of a C/D road, there are other reasons to exit and then re-enter, such as availability of more exits if you need to get off, or to bypass congestion if the mainline happens to be more congested. So, point taken, but I still don't think it would hurt to notify drivers that it is not a C/D road, and "no re-entry" would seem to be the simplest way to do that.
Quote from: kphoger on September 09, 2022, 12:57:31 PM
Should there be a "no re-entry" sign at, say, this exit (https://goo.gl/maps/uNiAzpQAYVB5MpfbA)? Or this exit (https://goo.gl/maps/gG48ELvG71cnGhkz9)?
No to the first one, because there's re-entry from NY 96 that's considered part of the same interchange. It requires one extra turn, but it's
well-signed (https://goo.gl/maps/Jwny11rej3cpSRcs8).
Yes to the second one, as it's similar to the examples in CO and PA that you and I linked to upthread.
Quote from: webny99 on September 09, 2022, 11:28:11 PM
In most cases, the main reason for exiting a highway and then immediately re-entering would be for a fuel/food/restroom stop. That's obviously not the case when you're exiting to another freeway, but in the case of a C/D road, there are other reasons to exit and then re-enter, such as availability of more exits if you need to get off, or to bypass congestion if the mainline happens to be more congested. So, point taken, but I still don't think it would hurt to notify drivers that it is not a C/D road, and "no re-entry" would seem to be the simplest way to do that.
Okay, but nobody on that thinks it's a C/D road. The only ways onto there are
the direct ramp from I-15 itself (https://goo.gl/maps/xqfTZp4MxVmxxADj9) and
the on-ramp from 90th South (https://goo.gl/maps/Po2h2ZQceU7ngnML8), and both of those are clearly identified as being
not I-15. Nobody is going to go under those signs and assume they'll be able to merge right back onto I-15. As others have mentioned, it looks like a ramp on the signs, and you don't realize how long it is until you're already on it.
It isn't signed as an exit, and its original intent was not to be an exit but reversible Express Lanes along I-70 that crossed the Mississippi River on the Poplar Street Bridge, but it now functions as a really, really, really long exit "ramp" from I-70 EB to I-44 WB:
The Eastbound I-70 Express Lanes in St Louis. They are no longer reversible/are permanent Eastbound/Inbound. They leave Mainline I-70 at MM 244.4. They never rejoin I-70, as I-70 TsOTSO onto the Stan Musial Veterans' Memorial Bridge, at MM 249.4. The Express Lanes rejoin the Freeway after it becomes the Eastern Origin of I-44, at I-44 MM 292.6. I-44's Easternmost MM is 293.2
The EB 70 TOTSO is not signed as an exit, but continuing onto WB 44 is signed as Left Exit 249A at the origin point of I-44
I think the Express Lanes should be signed as an early exit for I-44 WB and To SB I-55, since there is no access from the Express to continue on Mainline I-70 via the Stan Span
My math says these Express Lanes make up a 5.6 mile exit ramp from I-70 EB to I-44 WB
There are no "return" ramps to Mainline EB I-70 the full length of the Express Lanes
Quote from: ilpt4u on September 10, 2022, 12:01:50 AM
It isn't signed as an exit, and its original intent was not to be an exit but reversible Express Lanes along I-70 that crossed the Mississippi River on the Poplar Street Bridge, but it now functions as a really, really, really long exit "ramp" from I-70 EB to I-44 WB:
The Eastbound I-70 Express Lanes in St Louis. They are no longer reversible/are permanent Eastbound/Inbound. They leave Mainline I-70 at MM 244.4. They never rejoin I-70, as I-70 TsOTSO onto the Stan Musial Veterans' Memorial Bridge, at MM 249.4. The Express Lanes rejoin the Freeway after it becomes the Eastern Origin of I-44, at I-44 MM 292.6. I-44's Easternmost MM is 293.2
The EB 70 TOTSO is not signed as an exit, but continuing onto WB 44 is signed as Left Exit 249A at the origin point of I-44
I think the Express Lanes should be signed as an early exit for I-44 WB and To SB I-55, since there is no access from the Express to continue on Mainline I-70 via the Stan Span
My math says these Express Lanes make up a 5.6 mile exit ramp from I-70 EB to I-44 WB
There are no "return" ramps to Mainline EB I-70 the full length of the Express Lanes
Wow, that's an awesome one! I've only driven through there once since I-70 moved over to the Stan Span–and I was taking I-70 then anyway–so I was heretofore unfamiliar with exactly how the express lanes worked at that location. Nice find!
Quote from: kphoger on September 12, 2022, 01:49:00 PM
Wow, that's an awesome one! I've only driven through there once since I-70 moved over to the Stan Span–and I was taking I-70 then anyway–so I was heretofore unfamiliar with exactly how the express lanes worked at that location. Nice find!
It is signed very poorly at the Express Lane Entrance. Only message on the BGS: "Express Lanes Downtown" No mention of Next Available Exit, no mention that Thru I-70 CANNOT use the Express, and no mention that the Express Lanes next point of Access is along WB I-44
MoDOT really should resign the Express Lanes with all that information, but the "Main" BGS at the Express entrance should be "I-44 West/To I-55 South Tulsa/Memphis"
I learned this the hard way, first time flying out of STL since moving to Southern IL: I entered the Express fully expecting it to continue onto the Stan Span. I was a bit shocked that I had to pass the Stan Span, also no Freeway access to the Poplar St Bridge, so basically had to get off I-44 somewhere near the Arch and the casino, and take the Eads Bridge across the MS River to get back on I-64
I know better now. But honestly, this should be signed appropriately. This is the "main" route for traffic landing at STL Airport and driving to Southern IL. Drivers that may not be Locals and might need to know that the "Express" is NOT an express for Thru I-70 EB into IL
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Quote from: kphoger on September 12, 2022, 04:55:32 PM
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Yup, that exit was removed. You can go past the PSB on 44/55 and turn around and come back to the PSB, or exit before it Downtown and use the Eads or MLK Bridges
What about in China?
Quote from: ilpt4u on September 12, 2022, 05:20:28 PM
Quote from: kphoger on September 12, 2022, 04:55:32 PM
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Yup, that exit was removed. You can go past the PSB on 44/55 and turn around and come back to the PSB, or exit before it Downtown and use the Eads or MLK Bridges
44/55 is in Poughkeepsie.
Quote from: Rothman on September 12, 2022, 06:36:35 PM
Quote from: ilpt4u on September 12, 2022, 05:20:28 PM
Quote from: kphoger on September 12, 2022, 04:55:32 PM
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Yup, that exit was removed. You can go past the PSB on 44/55 and turn around and come back to the PSB, or exit before it Downtown and use the Eads or MLK Bridges
44/55 is in Poughkeepsie.
???
I-44 and I-55 are duplexed between the I-55 S ramp off the Poplar St Bridge until the 44/55 split in the Soulard STL neighborhood, pretty close to the AB Brewery
Quote from: ilpt4u on September 12, 2022, 06:56:59 PM
Quote from: Rothman on September 12, 2022, 06:36:35 PM
Quote from: ilpt4u on September 12, 2022, 05:20:28 PM
Quote from: kphoger on September 12, 2022, 04:55:32 PM
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Yup, that exit was removed. You can go past the PSB on 44/55 and turn around and come back to the PSB, or exit before it Downtown and use the Eads or MLK Bridges
44/55 is in Poughkeepsie.
???
I-44 and I-55 are duplexed between the I-55 S ramp off the Poplar St Bridge until the 44/55 split in the Soulard STL neighborhood, pretty close to the AB Brewery
Nah. They go across the Mid-Hudson Bridge.
Quote from: Rothman on September 12, 2022, 06:36:35 PM
Quote from: ilpt4u on September 12, 2022, 05:20:28 PM
Quote from: kphoger on September 12, 2022, 04:55:32 PM
I'd have been shocked too, especially that there was no access to the Poplar Street bridge–that is, no way to accomplish what would surely be my backup plan, of taking what used to be the I-70 exit.
Yup, that exit was removed. You can go past the PSB on 44/55 and turn around and come back to the PSB, or exit before it Downtown and use the Eads or MLK Bridges
44/55 is in Poughkeepsie.
US-44/NY-55 is not the same as I-44/I-55.
Quote from: jlam on June 15, 2021, 09:04:26 PM
I don't know whether this is the longest in Colorado, but the I-76 EB to I-25 NB ramp is 1.5 miles long, maybe a bit longer.
https://tinyurl.com/longramp
You know it's gonna be a good offramp when it has it's own mile markers. They have every, I think 2/10 mile, these 'enhanced' mile markers that are labeled "76 to 25".
Quote from: zachary_amaryllis on September 13, 2022, 08:52:57 AM
Quote from: jlam on June 15, 2021, 09:04:26 PM
I don't know whether this is the longest in Colorado, but the I-76 EB to I-25 NB ramp is 1.5 miles long, maybe a bit longer.
https://tinyurl.com/longramp
You know it's gonna be a good offramp when it has it's own mile markers. They have every, I think 2/10 mile, these 'enhanced' mile markers that are labeled "76 to 25".
Kansas has those at system interchanges, but they don't have mile numbers on them–just the route shields.
I redesigned the St Louis Express lane sign, and i think this would make a much better sign, especially for those unfamiliar with the area:
(https://i.imgur.com/C5GOlhi.png)
Quote from: MCRoads on September 16, 2022, 09:27:41 PM
I redesigned the St Louis Express lane sign, and i think this would make a much better sign, especially for those unfamiliar with the area:
(https://i.imgur.com/C5GOlhi.png)
THAT is, at the very least, much closer to what should be posted for the I-70 Express Lanes. On that sign bridge, or even at the current gore point, I would add the "Illinois" Control for I-70, or use a sign advising "To Illinois: Keep Right" or "To Illinois: Follow I-70" or "To Illinois: Use Local Lanes" Something along those lines
I would add a supplemental sign, advising next available exit: Broadway (I-44 shield) Exit 292B 6 Miles
This one is definitely questionable, as it could be considered a system split instead of a true off-ramp. But, in Wichita, it's now possible to get from NB I-235 to 29th/Hydraulic via this almost-two-mile-long 'ramp' (https://maps.app.goo.gl/p1RRodubDyG6LyRy8).
Longest I can easily measure for Oregon in Google Maps is I-5(288) south to I-205 north at 1.1 miles.
I can't get the distance for I-5(300) north to I-84/US 30 because the starting point keeps selecting the parking lot below the Marquam Bridge.
The ramp from I-11 southbound to I-15 southbound in Las Vegas is 2.8 miles long, running parallel to I-15 for much of that length, fully segregated, before finally merging in. It has its own exit ramps, to Charleston Blvd. and Sahara Ave., mirroring those along mainline I-15.
The first time my wife and I took it, we got to where the ramp to Sahara splits off, and there's an I-15 pullthrough, and my wife commented "We've been on this ramp so long I forgot we were even getting on the 15."