Just happened to be looking at GSV of Taylor, TX lately, and I noticed an interesting interchange on the east side of town:
https://www.google.com/maps/@30.5744911,-97.379314,17z
What's interesting to me here is that if you are heading SB on the US 79 bypass from the west, you encounter 2 separate ramps (a loop ramp and a longer ramp) that both accomplish the same movement. In other words, you get a "second chance" to go southbound in case you missed the first ramp.
What other interchanges have redundant ramps like this? Apologies if this thread has been done before.
Southbound I-35 has two ramps to Robinson Street in Norman. The first you encounter, Exit 110B, puts you on the two-way service road going southbound. The second one, 110A, loops back around and puts you at the same intersection with Robinson that 110B will, but if you continue straight you're on the service road going northbound.
Whenever I need to use that interchange I always use 110A because everyone else uses 110B, so the service road always backs up at that light, while I'm usually the only one using the 110A ramp.
https://goo.gl/maps/bXefF2zH4nwT6WA18
There are THREE separate ramps from I-64 eastbound to I-264 eastbound. Arguably not redundant though, considering one of them is now HO/T, and only one of them lets you access the Newtown Road interchange on 264.
This same interchange has other seemingly redundant movements as well, all of which are cases of providing both a flyover for mainline traffic and loop ramps for traffic to/from the adjacent interchanges on 264.
In Maryland, southbound I-95 has three (https://www.google.com/maps/@39.0226561,-76.9521896,15.29z) different ways to access the Inner Loop of the Capital Beltway–a two-lane flyover (the newest of the three ramps), a cloverleaf-style loop ramp that was the original primary route and is now used primarily for traffic wishing to access the Beltway's exit to US-1 (which is inaccessible via the flyover), and a ramp that's accessed by circling past the park-and-ride lot at the stub end of where the road was never completed. That third ramp would have been the northbound I-95 ramp to the Inner Loop had I-95 been constructed as planned.
In Virginia, the Inner Loop of the Beltway used to have two separate ramps to westbound I-66: Exit 9A (later 49A) was a left-side exit and Exit 9C (later 49C) was a right-side loop-around. The reason for the duplicate ramps was primarily to eliminate the danger caused by requiring traffic entering from US-50 just to the south to cut across four lanes of traffic to the left-side exit in a short distance, but in practice it didn't help because people cut across anyway. The duplication no longer exists because HO/T lane construction restricted the left-side exit to HO/T traffic and the general-purpose lanes now have only one ramp available.
Then there is this oddity (https://www.google.com/maps/@44.7529536,-75.4914792,14.62z) from southbound 416 to westbound 401 in Ontario. My sat-nav wanted me to take the longer way where you exit 416 to 16, then exit that to the right onto 401. I followed it just to see if there was any particular reason to go that way. There wasn't. Maybe whoever programmed the sat-nav knew the BGS for the longer route says "TO/VERS U.S.A." and got confused when programming it.
In the Richmond VA area there are also redundant ramps at the I-64/I-295 interchange, from I-295 south to I-64 east. A flyover and a cloverleaf loop ramp. There seems to be no reason to have left the original loop ramp, as there is no additional access provided.
In the Atlanta GA area at the I-75/I-285 interchange, the original loop ramp from I-75 south to I-285 east remained after a flyover ramp was constructed for that movement. Currently its existence is justified as providing access to I-285 east for traffic that entered I-75 south from Windy Hill Road. However that wasn't always the case, in the past Windy Hill Road traffic had access to the flyover ramp which made the loop ramp redundant.
Northbound I-170 has two left-lane exits (https://www.google.com/maps/@38.7299215,-90.3317818,15.49z?hl=en) to westbound I-70 near St Louis Lambert Airport. The original is the left-lane exit to left-lane entrance. The second ramp was built to reduce the number of drivers crossing all the lanes on I-70 to reach the first airport exit which serves the East Terminal. I doubt there are many dual/ redundant ramps that are both left-lane exits.
Northbound M-53 at 26 Mile Road in Washington, MI has two exit ramps to the roundabout interchange. This used to be a five- or six-ramp parclo before the roundabouts were built, but I assume this now-redundancy was kept to reduce the amount of northbound-to-westbound traffic going through the roundabout.
https://goo.gl/maps/MwkjnX16TvvV5s9z5
In Novi, MI, where the ramps from eastbound I-96 to eastbound I-696 and M-5 split, one can take the ramp to M-5 and then after merging use a cloverleaf ramp back to I-696. The cloverleaf ramp is intended for M-5 traffic, but it's accessible to traffic from eastbound I-96.
https://goo.gl/maps/KiMQa9ugoWtJ6K8s7
The trivial instance of this is for any freeway with service drives. Say you're going nb and miss your exit. Just continue to the next exit, loop around onto the sb service drive, and go back to where you wanted to be.
There's an anti-example at I-696 eb. Instead of a second chance to exit, you have a second chance to decide to not exit. Take the exit onto M-10, keep to the left, and you'll find a ramp back to I-696. The same thing can be done wb as well.
Another I thought of: In Virginia on northbound I-395, Exit 8A gives you the option of accessing Pentagon City via a ramp that joins Exit 8C. The reason for the overlap is that Exit 8A also has connections from other streets in the area and the ramp that joins Exit 8C exists primarily for that traffic, though it can be a bypass route when traffic is heavy.
Eastbound I-394 to southbound MN 100 in Golden Valley has this. You first come to a ramp split for MN 100 South and Westside Drive. If you take the Westside fork, you merge with a ramp coming off Cedar Lake Road to southbound MN 100, which has another fork for southbound 100 or exiting on Westside.
I personally think they should close the first ramp to 100 South and have the 394/100 merge point be at where the second fork is.
Also, westbound MN 62 to westbound US 212 in Edina. The main 62/212 split happens just past Gleason Road, but for those getting on WB 62 from Gleason or from US 169, there's a second exit ramp back to 212 just past 169 that I think I will get killed at every time I go through it.
- Near me in Maryland is the interchange where northbound US 29 meets I-70. After passing the first exit which you can use to take I-70 to Baltimore :poke:, there is a right loop exit to westbound I-70 followed immediately by a left turn to another ramp to I-70 westbound.
Even though the latter exit has a traffic light, I usually personally prefer it as it's easier to pick up merging speed than it is on a loop ramp.
- In Virginia, on northbound I-95 just north of Emporia there are two exits to northbound US 301.
I suspect that the first ramp is a remnant from when US 301 was the mainline, and what is now I-95 was a just a bypass of Emporia.
- There's also the famous one near Portland ME where northbound I-95 turns onto northbound I-295. The first exit goes through a tool booth, the second does not. A shunpiker's dream!
The La Palma Avenue exits on I-5 north in Anaheim. The first exit is an exit that is signed for La Palma Avenue that requires a right turn onto Brookhurst Street to then either turn left onto La Palma Avenue west (crossing several lanes to do so) or turn right onto La Palma Avenue east (staying in the right hand lane after the turn onto Brookhurst to do so).
The second exit is a right hand exit that is signed for and puts you directly onto to La Palma Avenue east.
(https://i.imgur.com/Cwmh9d6.jpg)
The quintessential Rochester example is here (https://www.google.com/maps/@43.1530011,-77.6074904,3a,23.5y,179.12h,89.69t/data=!3m6!1e1!3m4!1sWzOjfU-2fmVSWCwh0gkWnw!2e0!7i16384!8i8192); one of those ramps was supposed to be for I-390, which wasn't built (what is today I-390 north of exit 15 was to be part of I-590).
This interchange (https://www.google.com/maps/@43.1167638,-77.5521026,16z) is a double example. Exit 2A on I-590 south allows access to both directions of NY 31. More recently, the ramp from NY 31 east to I-590 south was reconfigured to allow access from both directions of NY 31.
Over in the Capital district, exits 3 and 4 (https://www.google.com/maps/@42.7283863,-73.7989611,15.38z) of the Northway. This wasn't supposed to be this way. NB exit 4 was supposed to become right turn only and SB exit 4 was to be removed entirely. Instead, NB exit 4 was retained in full and SB exit 4 realigned, resulting in two lights that should have been removed being retained and exit 3 being underutilized.
US 9 and Quay Street getting on I-787 north has three ramps for what is basically two roads (https://www.google.com/maps/@42.6494581,-73.7462552,16.5z) (that merge into one). Each road has two opportunities to get on I-787 north (the third ramp is shared since it's past the merge point).
I-75 SB at I-285 EB north of Atlanta has one.
I-95 SB at I-10 in Jacksonville has one now.
I-95 NB at I-195 in Miami has two exits to avoid weaving with I-395 traffic.
One that has been in place since the 1960s in San Francisco:
From the westbound lanes of I-80 past the Bay Bridge, one can either exit to Fremont Street ramp or to Harrison Street ramp - but BOTH end up leading you towards Fremont Street a block from the freeway!
https://www.google.com/maps/place/Harrison+St+%26+Fremont+St,+San+Francisco,+CA+94105/@37.7867846,-122.3942689,17z/data=!3m1!4b1!4m5!3m4!1s0x8085807a467ff6bf:0xa068a9ca7e43988e!8m2!3d37.7867846!4d-122.3920802
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Something not quite the same deal, but almost: the offramps from US 50 east to Hazel Avenue and Aerojet Road in Gold River, both of which lead to Folsom Boulevard near the Hazel light rail station:
https://www.google.com/maps/place/Aerojet+Rd,+Rancho+Cordova,+CA/@38.6305684,-121.2155521,17z/data=!4m5!3m4!1s0x809ae672be903913:0x3589285cc253dbc4!8m2!3d38.6262721!4d-121.1950514
And one that kinda counts but kinda doesn't: the ramps from I-280 south to Alemany Boulevard in SF. The first one though is from the ramp that carries US 101 south to I-280 south (and was US 101 from the mid-1950s to 1964) -
https://www.google.com/maps/@37.7350723,-122.4139719,17z
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In the South Bay, the half-diamond, half-semi-directional T setup at Route 85, Route 87, and Santa Teresa Boulevard offers several opportunities for redundant movements:
https://www.google.com/maps/place/Santa+Teresa+Blvd,+San+Jose,+CA/@37.2567465,-121.8588481,18z/data=!4m5!3m4!1s0x808e2fc67fd8da0b:0x3cbd1a3b9aac27ff!8m2!3d37.2276204!4d-121.7782579
This left turn lane, for instance, leads to a ramp that duplicates a direct right-hand ramp from Route 87 south to Route 85 north:
https://www.google.com/maps/@37.257089,-121.8590195,3a,75y,143.25h,71.64t/data=!3m7!1e1!3m5!1sW0bB85lgPgaOgCNMtproAw!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DW0bB85lgPgaOgCNMtproAw%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D321.93332%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192
Lots of this in OhioDOT D6, with braided ramps to get exiting traffic to the right side so they don't have to manually cross a lot of lanes (though definitely not redundant).
- I-270 NB to Easton Way and OH 161 (https://www.google.com/maps/@40.0153421,-82.9034019,3a,75y,351.45h,86.33t/data=!3m6!1e1!3m4!1s3_TuOu1eI7Jn0VboBckRdQ!2e0!7i16384!8i8192). Nothing's stopping you from crossing 3-5 lanes to exit (https://www.google.com/maps/@40.0363327,-82.9028989,3a,43.3y,23.96h,86.71t/data=!3m6!1e1!3m4!1sxYihMGSEjK8na6QOhT3v3Q!2e0!7i16384!8i8192) if you miss the first ramp.
- Same thing here for I-270 WB to Avery-Muirfield Dr (https://www.google.com/maps/@40.1020387,-83.132078,3a,39.4y,225.28h,92.49t/data=!3m6!1e1!3m4!1sI49rSSTh0JU8y2AVNYpM9Q!2e0!7i16384!8i8192). Second chance to exit. (https://www.google.com/maps/@40.0991685,-83.1460903,3a,75y,266.29h,93.05t/data=!3m6!1e1!3m4!1sEZXsHqKKoX4PdA5VY4JYHw!2e0!7i16384!8i8192)
- And I-71 SB to Stringtown Rd (https://www.google.com/maps/@39.897569,-83.0337032,3a,49y,211.41h,95.3t/data=!3m6!1e1!3m4!1sJFhDyciRDnvuihcfRDxuoQ!2e0!7i16384!8i8192), with its second chance (https://www.google.com/maps/@39.8850876,-83.0453326,3a,48.9y,212.06h,89.83t/data=!3m6!1e1!3m4!1sWYw_EXm0zeUt0J-Y-df3PQ!2e0!7i16384!8i8192).
In Tampa, if you want to go from NB SR 589 (and I-275 SB) to SR 60 west towards Clearwater, there are two ramps: the first one that's signed directs you past the airport entrance and ultimately forces you to go through a small weaving maneuver. The second one bypasses all that, you just have to know to ignore the first "SR 60 West - Clearwater" sign you see.
(Street view) (https://goo.gl/maps/AaNbcBsP1d4sLULz9)
I-880 N, Dixon Landing Road exit has two ramps, but both directions of Dixon Landing Road can be accessed by both ramps.
I-880 S, CA-237 W can be accessed from both CA-237 exits
both are in Milpitas, CA
In NJ, to access I-76 West from I-295 North, one can take Exit 26 to enter I-76 on the left, or Exit 27 to enter I-76 on the right.
In Delaware, there are two ramps from DE 1 to I-95 North: 165C on the left, which splits to allow a motorist to join I-95 North on the left or right, and Exit 165B, which joins the ramp from Exit 165C meeting I-95 on the right.
Also in the St. Louis area:
* I-44 at MO 141 in Fenton: (https://goo.gl/maps/Z5D9xm6k5hFdnpH78) WB I-44 to SB MO 141 can be accomplished by using the newer loop ramp or making a left. There's a somewhat similar situation for SB MO 141 to EB I-44: The movement can be made using the newer flyover or making a left turn at South Highway Drive and using the previous ramp.
* I-270/I-255 to US 61-67: (https://goo.gl/maps/aXxyD2fWF97pmXhB6) First ramp comes off the former C-D roadway for the ramps to I-55. Then there's the second, older ramp from I-255 to US 61-67 east of I-55, though getting through traffic entering I-255 from I-55 can get interesting.
* Prior to the rebuild that added flyovers to the I-44/I-270 interchange, it was possible to get from EB I-44 to EB MO 366 by going through the C-D roadway with the ramps to I-270 or taking the later direct ramp.
Exit 122 on I-80 in Utah (https://goo.gl/maps/KnzCa4jBUt12c7Dm7) is entirely redundant. Everywhere it goes can also be accessed by taking exit 123AB from I-80 and then taking the next ramp to the right (https://goo.gl/maps/4jsxPBx72b1k2ke69), which is there because traffic entering I-80 from State Street cannot access the westbound mainline.
Exit 122 is signed as "2100 S/1300 S/900 S", while the other ramp is "I-15 North/I-80 West". But they go to the exact same destinations, and in fact dump into the I-15 northbound C/D road within a couple hundred feet of each other.
SR 528 in Central Florida has both SR 407 NB to reach I-95 plus a direct ramp later. The407 connection is shorter.
Then SB I-95 has the SR 407 exit and the 528 cloverleaf both to connect SB to WB with SR 407 again being shorter.
Let's not forget I-70 exits 361 and 363 in Limon, CO.
Oh yeah and traffic from I-95 N Bound to MD 193 has two ramps. One from Exit 22A and the other via the BW Parkway also from 22A.
Quote from: roadman65 on January 25, 2022, 09:17:09 PM
I-75 SB at I-285 EB north of Atlanta has one.
I-95 SB at I-10 in Jacksonville has one now.
I-95 NB at I-195 in Miami has two exits to avoid weaving with I-395 traffic.
The I-10 approach to I-95 also has redundant ramps, the first split is signed with I-95 south on the left and I-95 north on the right (https://goo.gl/maps/crUmEQgmz9W11aRr5), but continuing on either side gives access to both north and south (https://goo.gl/maps/7SgxX3YJHFZYg3GY9). The right side needs access to both directions due to the on-ramp from Stockton St, but the left side could omit the ramp to I-95 north and it would still be a complete interchange.
In Aberdeen, Maryland, eastbound MD 22 is accessible from eastbound US 40 either through an explicity-marked ramp to the right or through a left turn and then a right turn onto the Rogers Street ramp, which is the only way to get there from US 40 westbound.
I-78 in New York always had two exits for Hudson Street exiting the Holland Tunnel.
-In DC, I-695 (future realigned I-395) has an initial ramp for I-395 (future I-195) north (https://www.google.com/maps/@38.8799345,-76.999523,3a,75y,293.18h,93.39t/data=!3m6!1e1!3m4!1s_cWFHIZma1Gjv_md1yCZdA!2e0!7i16384!8i8192?hl=en), which simply goes around an onramp from Virginia Ave (https://www.google.com/maps/@38.8810411,-77.0022374,18z?hl=en) and rejoins I-695 for a short weave (https://www.google.com/maps/@38.881092,-77.0052088,3a,75y,276.21h,79.08t/data=!3m6!1e1!3m4!1suQf0nnPJ0YBaPHAmzAsGmg!2e0!7i16384!8i8192!5m1!1e1?hl=en), then actually departs for I-395 north (https://www.google.com/maps/@38.8813629,-77.007592,3a,42.5y,293.58h,89.85t/data=!3m6!1e1!3m4!1sZadosO2eiec-Psyl4yPGpA!2e0!7i16384!8i8192!5m1!1e1?hl=en). That bypass ramp is helpful for avoiding a quick weave closer to the actual ramp, but you're not of luck if you miss it.
-In MD, There are 2 ramps to I-695 westbound from I-97 (https://www.google.com/maps/@39.2035657,-76.6258899,16z?hl=en). The first is the primary high-volume thru movement (https://www.google.com/maps/@39.1960385,-76.6320381,3a,75y,12.1h,85.69t/data=!3m6!1e1!3m4!1spJxOt-HovQ4bUC0-kR5blQ!2e0!7i16384!8i8192!5m1!1e1?hl=en), while the second allows local access to I-695 exit 5 (the interchange immediately west of I-97, which the thru ramp misses due to merging into I-695 from the left just beyond the exit). This 2nd ramp is signed as if it leads straight to MD 648 (https://www.google.com/maps/@39.2059105,-76.6278929,3a,75y,63.76h,89.26t/data=!3m6!1e1!3m4!1sY_CdDyYGIW0D3gXfzUKZEA!2e0!7i13312!8i6656!5m1!1e1?hl=en), but in fact it enters I-695 first.
-Also in MD, I-695 at MD 372 (https://www.google.com/maps/@39.2629121,-76.7055349,17.25z?hl=en). Exit 12B provides access to MD 372 eastbound (https://www.google.com/maps/@39.2604191,-76.7027271,3a,75y,316.68h,89.27t/data=!3m6!1e1!3m4!1s8sTfzz7BB5C8lyHuGKB-qg!2e0!7i16384!8i8192!5m1!1e1?hl=en), but if you follow Exit 12C (initially signed for MD 372 westbound (https://www.google.com/maps/@39.2627914,-76.7069743,3a,75y,319.87h,89.44t/data=!3m6!1e1!3m4!1sQB-yvL4N7AoClVOakb5rLQ!2e0!7i16384!8i8192!5m1!1e1?hl=en)),you'll ultimately have access to either direction. The only reason I thought to include this example is that once off the I-695 mainline, the signage at the end of the 12C ramp (https://www.google.com/maps/@39.2636417,-76.7071611,3a,75y,55.62h,89.86t/data=!3m6!1e1!3m4!1shunGPtTL1msbsLTRl44F9w!2e0!7i16384!8i8192!5m1!1e1?hl=en) and then at Wilkens Ave (https://www.google.com/maps/@39.2630754,-76.7058952,3a,75y,162.34h,88.86t/data=!3m6!1e1!3m4!1sTTRN5495SVcX-EMauOlF8g!2e0!7i16384!8i8192!5m1!1e1?hl=en) fully acknowledges the redundancy.
Quote from: dlsterner on January 25, 2022, 08:30:19 PM
- Near me in Maryland is the interchange where northbound US 29 meets I-70. After passing the first exit which you can use to take I-70 to Baltimore :poke:, there is a right loop exit to westbound I-70 followed immediately by a left turn to another ramp to I-70 westbound.
Even though the latter exit has a traffic light, I usually personally prefer it as it's easier to pick up merging speed than it is on a loop ramp.
This one I've always found interesting for several reasons. I presume the original intent was to allow US 29 traffic to access I-70 westbound from either lane (instead of having to bunch up in the right lane approaching the cloverleaf) and thus allow traffic to spread out a bit more, especially since I-70 westbound at this interchange tends to be a massive rush-hour chokepoint. But I've gotten the sense MDOT SHA has some buyer's remorse - over the years (presumably due to crashes) it changed from a stop sign crossing US 29 southbound, to a permissible traffic signal with the MD-style flashing red, to a fully-protected steady red. Additionally, all signage for the left-turn from US 29 northbound (except for this one, after you've already committed to the turn (https://www.google.com/maps/@39.2984609,-76.825692,3a,75y,273.49h,86.57t/data=!3m6!1e1!3m4!1skdMFypzD3dq-vn-OHP3okw!2e0!7i16384!8i8192!5m1!1e1?hl=en)) was removed at some point.
I usually prefer the original cloverleaf just because I like the feeling of continuing to move versus waiting at a red light, but I've noticed that a decent number of motorists will change their mind between ramps at the last second depending on the signal phase at the left turn.
A couple I can think of near me:
CT 15 has a direct ramp to I-91 South, then has a second connection to I-91 South by staying on the Airport Rd exit ramp.
In the other two scenarios, the marked ramp is the 2nd chance
I-84 west to I-384 East. Exit 59 is the marked movement, but it can also be accessed from the Exit 62-60 C/D road
The whole Exit 21-22 (soon to be 31-32) complex of CT 9 and US 5/CT 15 is full of second chances. Northbound 21 (31) is marked for 5/15 North, but one can go south by staying on 372 and taking a couple of lefts. Exit 22 is for 5/15 South, but one can still go north by turning left onto Worthington Ridge instead of right. Southbound has 21 (31) marked for 5/15 in both directions, but 22 (32) is actually easier for southbound traffic because one can continues straight off the ramp and easily merge into 5/15 South. The marked movement requires a signalized left turn across northbound traffic.
Quote from: Occidental Tourist on January 25, 2022, 08:46:35 PM
The La Palma Avenue exits on I-5 north in Anaheim. The first exit is an exit that is signed for La Palma Avenue that requires a right turn onto Brookhurst Street to then either turn left onto La Palma Avenue west (crossing several lanes to do so) or turn right onto La Palma Avenue east (staying in the right hand lane after the turn onto Brookhurst to do so).
The second exit is a right hand exit that is signed for and puts you directly onto to La Palma Avenue east.
Similarly, on CA-118 westbound at Madera Rd in Simi Valley, Exit 22B is labelled "Madera Rd North", and traffic exiting there must turn right onto Madera Rd northbound. Exit 22A is labelled "Madera Rd South", and traffic exiting there reaches a traffic signal where it can turn either left (northbound) or right (southbound) onto Madera Rd.
The discussion of US 29 in Maryland reminded me of NY 342 west at I-81 south (https://www.google.com/maps/@44.0350055,-75.9151945,3a,84.3y,257.18h,86.19t/data=!3m6!1e1!3m4!1snuOGyWEQzUFlWR6tEuwqYw!2e0!7i16384!8i8192). The signed movement is the loop ramp, but practically everybody just takes the left turn.
Quote from: roadman65 on January 26, 2022, 07:23:00 AM
I-78 in New York always had two exits for Hudson Street exiting the Holland Tunnel.
Looks like it on a map, but nope (https://www.google.com/maps/@40.721736,-74.007617,3a,24.9y,296.02h,88.9t/data=!3m7!1e1!3m5!1sCUpq1r6f-_iSlTKv4e435w!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DCUpq1r6f-_iSlTKv4e435w%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D254.88367%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192).
One that is not marked... On I-95 N/B in Lynnfield, if you miss the exit for US 1 S/B, the N/B exit takes you to both directions.
A couple on the Taconic Parkway:
Exit 17A is marked for 202/35 East, but either direction can be accessed. 17B (Bear Mountain Pkwy) only offers access to 202/35 West.
Exit 19 Northbound is marked for NY 132, but offers easy access to US 6. Exit 20 is the marked exit for US 6.
There's a redundant entrance to I-64 from US 119 at the end of Corridor G in Charleston. There's a ramp that leads to a flyover that's accessible from the right lane. Then, there's a left turn from the left lane that leads to the same ramp.
https://goo.gl/maps/MozUWuAiwXFo765K6
Quote from: Revive 755 on January 25, 2022, 11:08:33 PM
Also in the St. Louis area:
* I-44 at MO 141 in Fenton: WB I-44 to SB MO 141 can be accomplished by using the newer loop ramp or making a left. There's a somewhat similar situation for SB MO 141 to EB I-44: The movement can be made using the newer flyover or making a left turn at South Highway Drive and using the previous ramp.
* I-270/I-255 to US 61-67: (https://goo.gl/maps/aXxyD2fWF97pmXhB6) First ramp comes off the former C-D roadway for the ramps to I-55. Then there's the second, older ramp from I-255 to US 61-67 east of I-55, though getting through traffic entering I-255 from I-55 can get interesting.
* Prior to the rebuild that added flyovers to the I-44/I-270 interchange, it was possible to get from EB I-44 to EB MO 366 by going through the C-D roadway with the ramps to I-270 or taking the later direct ramp.
The second is going to different parts of US 61/67. The first is going to Lindbergh (also US 50/61/67) west of South County Mall. The second goes to Lemay Ferry Rd (US 61/67) east of the mall. It's not much different than the two NB I-55 to South Broadway ramps, first by the Wiffledome and the second just south of the Brewery. Or using the EB I-44 to Watson Road exit to get to Lindbergh not far from the I-44/Lindbergh exit.
I hated that suicide crossing of the C-D lane to Watson Rd entrance and NB I-270 to EB I-44 ramp. The current layout is much better and safer. And the flyover at MO 141 was much needed; MODOT definitely got that one right.
I immediately thought of southbound Mopac (https://goo.gl/maps/RDUZxSoFKK5GKEmg7) in south Austin. Yes, the first ramp is labeled Frontage road for access to the hotel, but both that exit and the Eastbound US-290/TX-71/Southwest Parkway exit after that are really for 290 and Southwest Parkway.
Maybe this (https://goo.gl/maps/z1G159UhMZ2TeQP99) doesn't count because it's service road vs. mainlines, but in El Paso there is a stack on top of a cloverleaf effectively having two exists for every movement in the interchange.
Quote from: skluth on January 26, 2022, 04:39:59 PM
Quote from: Revive 755 on January 25, 2022, 11:08:33 PM
Also in the St. Louis area:
* I-44 at MO 141 in Fenton: WB I-44 to SB MO 141 can be accomplished by using the newer loop ramp or making a left. There's a somewhat similar situation for SB MO 141 to EB I-44: The movement can be made using the newer flyover or making a left turn at South Highway Drive and using the previous ramp.
* I-270/I-255 to US 61-67: (https://goo.gl/maps/aXxyD2fWF97pmXhB6) First ramp comes off the former C-D roadway for the ramps to I-55. Then there's the second, older ramp from I-255 to US 61-67 east of I-55, though getting through traffic entering I-255 from I-55 can get interesting.
* Prior to the rebuild that added flyovers to the I-44/I-270 interchange, it was possible to get from EB I-44 to EB MO 366 by going through the C-D roadway with the ramps to I-270 or taking the later direct ramp.
The second is going to different parts of US 61/67. The first is going to Lindbergh (also US 50/61/67) west of South County Mall. The second goes to Lemay Ferry Rd (US 61/67) east of the mall.
The ramps I had in mind connect to Lemay Ferry (https://goo.gl/maps/qFVBdnv9b9CPw3WN9), not Lindbergh. One tines into the intersection with Forder Road (https://goo.gl/maps/rr4NfsBMqgodyhzF9), the other one just north of the intersection with Forder Road. (https://goo.gl/maps/3tUNR6Stwt3Lb8Cr5)
Quote from: vdeane on January 26, 2022, 12:42:02 PM
The discussion of US 29 in Maryland reminded me of NY 342 west at I-81 south (https://www.google.com/maps/@44.0350055,-75.9151945,3a,84.3y,257.18h,86.19t/data=!3m6!1e1!3m4!1snuOGyWEQzUFlWR6tEuwqYw!2e0!7i16384!8i8192). The signed movement is the loop ramp, but practically everybody just takes the left turn.
Quote from: roadman65 on January 26, 2022, 07:23:00 AM
I-78 in New York always had two exits for Hudson Street exiting the Holland Tunnel.
Looks like it on a map, but nope (https://www.google.com/maps/@40.721736,-74.007617,3a,24.9y,296.02h,88.9t/data=!3m7!1e1!3m5!1sCUpq1r6f-_iSlTKv4e435w!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fpanoid%3DCUpq1r6f-_iSlTKv4e435w%26cb_client%3Dmaps_sv.tactile.gps%26w%3D203%26h%3D100%26yaw%3D254.88367%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192).
The turn prohibition at the signal was added later. Right turns onto Hudson were originally allowed.
PA Turnpike Northeast Extension (I-476) northbound traffic can exit to PA 63 using the slip ramp originally intended for EZ-Pass users only, or can use the original exit that passes through the old toll booth.
Similarly, PA 63 traffic wishing to access I-476 southbound can use the EZ-Pass slip ramp or the original ramps via the old toll booth.
I'm fairly certain that, with the change to cashless tolling, all traffic can use any of the ramps now, making them truly redundant.
Although it's not advertised, eastbound US 78 (Lamar Ave) at the southern I-240 interchange has two opportunities to access I-240 in either direction.
https://www.google.com/maps/place/Southaven,+MS/@35.0809219,-89.9564259,692m/data=!3m1!1e3!4m5!3m4!1s0x887f89df94363561:0x6a91a4b490ac7cbd!8m2!3d34.9918587!4d-90.0022958
Quote from: Revive 755 on January 26, 2022, 10:12:55 PM
Quote from: skluth on January 26, 2022, 04:39:59 PM
Quote from: Revive 755 on January 25, 2022, 11:08:33 PM
Also in the St. Louis area:
* I-44 at MO 141 in Fenton: WB I-44 to SB MO 141 can be accomplished by using the newer loop ramp or making a left. There's a somewhat similar situation for SB MO 141 to EB I-44: The movement can be made using the newer flyover or making a left turn at South Highway Drive and using the previous ramp.
* I-270/I-255 to US 61-67: (https://goo.gl/maps/aXxyD2fWF97pmXhB6) First ramp comes off the former C-D roadway for the ramps to I-55. Then there's the second, older ramp from I-255 to US 61-67 east of I-55, though getting through traffic entering I-255 from I-55 can get interesting.
* Prior to the rebuild that added flyovers to the I-44/I-270 interchange, it was possible to get from EB I-44 to EB MO 366 by going through the C-D roadway with the ramps to I-270 or taking the later direct ramp.
The second is going to different parts of US 61/67. The first is going to Lindbergh (also US 50/61/67) west of South County Mall. The second goes to Lemay Ferry Rd (US 61/67) east of the mall.
The ramps I had in mind connect to Lemay Ferry (https://goo.gl/maps/qFVBdnv9b9CPw3WN9), not Lindbergh. One tines into the intersection with Forder Road (https://goo.gl/maps/rr4NfsBMqgodyhzF9), the other one just north of the intersection with Forder Road. (https://goo.gl/maps/3tUNR6Stwt3Lb8Cr5)
Got it. I usually drove I-55 when I lived in So County so I tend to forget the ramp by the White Castle. Strangely, you can turn left or right at the end of both ramps.
I-5 NB has two ramps for Roxford Street, and they both have EB and WB access. The difference is that the first ramp has a truck restriction.
Near Duncannon, PA, the interchange (https://goo.gl/maps/2VVM1TzxANEQJ8778) between US 11/15 (which runs SW-NE through the interchange) and US 22/322 (which runs N-S) features separate direct ramps from WB 22/322 to NB 11/15 and SB 11/15, followed immediately by the local exit for Amity Hall. Turning right from the end of that third ramp leads immediately to local on-ramps to both directions of 11/15. Similarly, the EB local exit from 22/322 (which is actually the only way to get to NB 11/15 from that direction) also allows for a second way to get to SB 11/15 for the same reason.
In Federal Way (https://www.google.com/maps/@47.2887274,-122.2999541,14.74z?hl=en), westbound SR 18 traffic can get to SR 161 either by exiting to SB I-5 and then taking the relatively-new ramp next to the I-5 overpass (which is not accessible from I-5 itself), or by continuing straight and turning left at the intersection.
In Tukwila (https://www.google.com/maps/@47.4845399,-122.2741372,3a,73.9y,125.72h,98.29t/data=!3m7!1e1!3m5!1stopOC6ll-YDBBwWfg-IzJw!2e0!5s20210801T000000!7i16384!8i8192?hl=en), at the end of southbound SR 599, the only two options both take you to SB I-5, and it's even signed as such. The left ramp (which used to be signed just for HOV traffic and people heading to NB 405) goes to the left side of I-5, and the right ramp goes to the right side (and there's nothing stopping people from taking the right ramp and merging all the way over to the left).
In Tacoma (https://www.google.com/maps/@47.2259329,-122.4558694,15.22z?hl=en), either exit 132 or 133 allow access to I-705/SR 7 (and both also allow you to get back on northbound I-5, which can be useful in some traffic conditions). Further east (https://www.google.com/maps/@47.2385503,-122.4062143,15.92z?hl=en), either exit 134 or 135 access NB SR 167, with 135 just skipping a couple signals.
In Silverdale (https://www.google.com/maps/@47.6606378,-122.6911734,15.5z?hl=en), northbound SR 3 to southbound SR 303 and northbound SR 303 to southbound SR 3 both have two options. Coming from SR 3, the second option is better because it is free-flow, but coming from SR 303, one involves a left turn but the other involves going straight through two signals and then a free right, so either could probably be more efficient depending on when within their cycles you hit the signals in question.
Quote from: 1995hoo on January 25, 2022, 03:19:12 PM
Then there is this oddity (https://www.google.com/maps/@44.7529536,-75.4914792,14.62z) from southbound 416 to westbound 401 in Ontario. My sat-nav wanted me to take the longer way where you exit 416 to 16, then exit that to the right onto 401. I followed it just to see if there was any particular reason to go that way. There wasn't. Maybe whoever programmed the sat-nav knew the BGS for the longer route says "TO/VERS U.S.A." and got confused when programming it.
Going eastbound on the 401 and approaching this exit, there's a sign that says "OTTAWA ALTERNATE EXIT, via 16".
(https://i.imgur.com/obcKuqv.png)
I'm guessing in the extremely rare event that the regular ramps are closed, that's when you'd take 16.
If it's after the main exit, the sign doesn't really need the "Alternate Exit" legend on it, since at that point it would be the main route.
Following the pattern of the other Washington State posts above me by jay8g:
In Bellevue (https://www.google.com/maps/@47.5792351,-122.141215,542m/data=!3m1!1e3), northbound 148 Ave SE can be accessed three different ways: (1) exit 11B from eastbound I-90, which is a flyover; (2) exit 11A, staying left and then taking the loop ramp onto northbound 150 Ave SE (and then staying straight onto 148 Ave SE); or, (3) taking exit 11A, staying right, and then turning left at the end of the ramp onto northbound 150 Ave SE (and then staying straight onto 148 Ave SE). This interchange has some other redundancy in it, but it's just for arterial movements.
Meeting the parenthetical, but not main, criteria of the thread: https://goo.gl/maps/HuzmC7AkATcHD3Sn8
Both making the left turn and taking the right hand ramp will allow the driver to access EB MD-200, but only one sign says so. They are redundant, but are at nearly the same place on Shady Grove Road so neither is exactly "a second chance". (WB I-370 can only be accessed by the RH ramp.)