I was in Chicago recently traveling out on I-88 and noticed that there is a segment where I-355 runs side-by-side with I-88. To my knowledge, I can think of only one other instance where two different limited access highways are side-by-side in such close proximity (that would be I-95 and Florida's Turnpike for a brief distance). Can anyone else think of an example?
I know the NJ Turnpike has two parallel roads near I-78, but I still think that as one highway.
I-295 and the New Jersey Turnpike run parallel in several segments east of Camden NJ. They are close enough you can see 295 from the Turnpike.
In Meriden, CT, I-91 runs in between the two carriageways of CT 15. In the south end of Hartford, the two highways (CT 15 at that point being duplexed with US 5), criss-cross twice and run parallel.
I-95 and I-295 around Richmond, VA - they get pretty close south of Downtown Richmond but don't actually join back for 30 or so miles.
Florida's Turnpike and I-95 are side by side for a while but then diverge. There's no direct connection between them either - very similar situation to I-295 and the NJ Turnpike.
Baltimore-Washington Pkwy and I-95 between Washington, D.C. and Baltimore, MD. Also add US-29 north of the Intercounty Connector to that mix to create three limited-access highways parallel to each other
Here's something interesting to switch it up a bit - a 1.5 mile stretch of Tidewater Drive in Ocean View in Norfolk, VA is a 30-40s style limited-access highway, and parallel to it is the more modern I-64. Technically, it's allowed by the OP as Tidewater Drive is technically a limited-access highway.
I-476 and I-81 run very close to each other from Dupont and Chinchilla, PA. While in the Dupont area, the two run very close to each other for about 2 miles, sometimes no more than 100 feet away from each other
Quote from: oscar on July 02, 2019, 08:46:25 PM
I-295 and the New Jersey Turnpike run parallel in several segments east of Camden NJ. They are close enough you can see 295 from the Turnpike.
At their closest point you can't fit a football field width-wise between them.
95/FL Tpk is closer though...just a Jersey barrier between them at one point.
Quote from: MASTERNC on July 02, 2019, 08:35:54 PM
I was in Chicago recently traveling out on I-88 and noticed that there is a segment where I-355 runs side-by-side with I-88. To my knowledge, I can think of only one other instance where two different limited access highways are side-by-side in such close proximity (that would be I-95 and Florida's Turnpike for a brief distance). Can anyone else think of an example?
I know the NJ Turnpike has two parallel roads near I-78, but I still think that as one highway.
You were close to another pair - I-290 and I=294.
Quote from: jeffandnicole on July 02, 2019, 09:16:54 PM
just a Jersey barrier between them at one point.
https://www.google.com/maps/@26.9563106,-80.166883,3a,75y,332.45h,86.67t/data=!3m7!1e1!3m5!1s1DMLgvW7CQhVNG3P7C2vtQ!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3D1DMLgvW7CQhVNG3P7C2vtQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D83.16873%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656!5m1!1e1
A small grassy separation too, but the point still stands. It's a mere 20 feet between the pavement edges.
How close do they need to be? For example, would I-95 and the Merritt Pkwy be too far apart to qualify?
Quote from: webny99 on July 02, 2019, 09:32:41 PM
How close do they need to be? For example, would I-95 and the Merritt Pkwy be too far apart to qualify?
I would count it based on my previous examples.
A-20 and A-40 on the west side of Montréal
MA 24 and MA 79
Quote
I know the NJ Turnpike has two parallel roads near I-78, but I still think that as one highway.
It is one roadway. It's just split between the inner and outer roadways, rather than a continous 6 or 7 lane wide highway.
Quote from: sprjus4 on July 02, 2019, 09:35:25 PM
Quote from: webny99 on July 02, 2019, 09:32:41 PM
How close do they need to be? For example, would I-95 and the Merritt Pkwy be too far apart to qualify?
I would count it based on my previous examples.
That's kind of stretching it, since the closest they come are about 1 1/2 miles apart at the Milford Connector. In that case, I would also count the Thruway and the Henry Hudson/Saw Mill between the Cross Bronx and I-287, and trifecta it with the Palisades Parkway on the other side of the Hudson. You could even add the Bronx River and Sprain Parkways to the mix.
Add I-95 and I-895 through Baltimore City with the Fort Mac and Harbor Tunnels.
It may be too short for this thread, but I-80/Ohio Turnpike and I-271 run adjacent through the Cuyahoga River valley north of Akron:
https://www.google.com/maps/search/41.252654,+-81.581119?sa=X&ved=2ahUKEwikqtug35fjAhWHGM0KHc3VBMIQ8gEwAHoECAoQAQ (https://www.google.com/maps/search/41.252654,+-81.581119?sa=X&ved=2ahUKEwikqtug35fjAhWHGM0KHc3VBMIQ8gEwAHoECAoQAQ)
Also, I believe that the Indiana Toll Road and I-80/94 could count between their interchange and I-65.
https://www.google.com/maps/place/41%C2%B034'37.8%22N+87%C2%B015'48.9%22W/@41.577169,-87.2657707,17z/data=!3m1!4b1!4m14!1m7!3m6!1s0x0:0x0!2zNDHCsDE1JzA5LjYiTiA4McKwMzQnNTIuMCJX!3b1!8m2!3d41.252654!4d-81.581119!3m5!1s0x0:0x0!7e2!8m2!3d41.5771649!4d-87.263582 (https://www.google.com/maps/place/41%C2%B034'37.8%22N+87%C2%B015'48.9%22W/@41.577169,-87.2657707,17z/data=!3m1!4b1!4m14!1m7!3m6!1s0x0:0x0!2zNDHCsDE1JzA5LjYiTiA4McKwMzQnNTIuMCJX!3b1!8m2!3d41.252654!4d-81.581119!3m5!1s0x0:0x0!7e2!8m2!3d41.5771649!4d-87.263582)
- I-90 (New York State Thruway) is straddled by I-790 and NY 49 and is close to NY 5S in the Utica, NY area.
- I-15 and U-69 (Legacy Parkway) run directly adjacent to each other between Salt Lake City and Ogden, UT.
- US 9 and the Garden State Parkway run directly adjacent to each other across the Raritan River at Perth Amboy, NJ.
There are numerous instances in Europe of local urban motorways directly paralleling cross-country toll motorways, especially in Italy and Spain. Their relationships are like the situation in the Utica, NY area that I mentioned above.
Mike
There aren't too many California examples of this (I'm very specifically excluding closely parallel freeways like say US 101/I-280 through San Bruno, I-805 and I-5 in San Diego, or 880 and 580 through Oakland), but some do come to mind, mostly due to an older freeway being supplanted by a modern alignment nearby.
- Pacific Highway (former US 101) and I-5/San Diego Freeway near Lindbergh Field (San Diego International Airport)
- Kearny Villa Road (former US 395 and I-15) and modern I-15 through Miramar MCAS
- Oak Grove Drive (former Route 118) and the modern I-210/Foothill Freeway in Altadena
In Atlanta, Georgia, current I-85 runs parallel to the older alignment, which is now GA 13/Buford Spring Connector
AZ 143 (Hohokam Expy) and the former AZ 153 (Sky Harbor Fwy, now S. 44th St) in Phoenix are next to each other for about 1/3 mile, spaced about a block. ADOT decertified the latter as a state highway in 2008, but the freeway segment is still in use.
I-84 and I-205 run about 600 feet apart for a little over a mile in Portland.
Quote from: mgk920 on July 02, 2019, 11:17:43 PM
- I-15 and U-69 (Legacy Parkway) run directly adjacent to each other between Salt Lake City and Ogden, UT.
Legacy is SR 67, not 69.
I'm 90% sure we've had a thread on this, but I'm not finding it.
I know of two examples; you can see the other freeway from either road:
1) Southwest of Meadowvale, Ontario: Hwy's 401 and 407 run side-by-side (about 120 metres apart) for about 2 kilometres.
2) Tacoma and Fife, Washington: I-5 and WA-509 are about 1/3 of a mile from each other, but intersect only using other roads.
Haven't we had this thread before?
Quote from: US 89 on July 03, 2019, 12:39:48 AM
Nobody's mentioned I-95 and Florida's Turnpike north of Palm Beach.
Well, nobody except the OP...
Quote from: MASTERNC on July 02, 2019, 08:35:54 PM
I-95 and Florida's Turnpike
Quote from: US 89 on July 03, 2019, 12:39:48 AM
I'm 90% sure we've had a thread on this, but I'm not finding it.
Quote from: 1 on July 03, 2019, 06:46:08 AM
Haven't we had this thread before?
I can't find anything exact, though there is this:
https://www.aaroads.com/forum/index.php?topic=2811.0
In SE MI, I-696 runs in the median the M-10 Lodge freeway for about a mile.
The Belt Parkway and the Nassau Expressway come to mind, though the latter might not count due to its incomplete nature.
In Windsor, ON, Highway 401 and the EC Row Expwy are intertwined but independent for a stretch.
https://www.google.ca/maps/@42.272685,-83.0681648,14.63z?hl=en&hl=en
I-35W runs down the center of I-94 (https://www.google.com/maps/@44.966581,-93.2610301,1375m/data=!3m1!1e3?hl=en) for a bit more than a half mile south of downtown Minneapolis and down the center of MN 62 (https://www.google.com/maps/@44.8907918,-93.2848537,1157m/data=!3m1!1e3?hl=en) about west of the airport.
AZ 143 and former 153 near Sky Harbor Airport in Phoenix.
(slight derail: in Japanese, 空 means sky (or empty, etc.), and 港 means harbor. Combine them, and 空港 means airport, so Sky Harbor Airport would be 空港空港.)
Not sure if these have been mentioned, but . . .
- I-15 and UT-67 in SLC.
- I-80 (Ohio Pike) and I-271 near Cuyahoga Valley NP.
- Not right next to each other, but I-43/94 and I-794 in Milwaukee are close to each other - about a mile apart at most.
Quote from: thspfc on July 03, 2019, 12:19:04 PM
Not sure if these have been mentioned, but . . .
Isn't that what scrolling through / reading the thread is for? :pan:
The first two definitely have been, but I don't see any mention of the Milwaukee example.
In Elyria, OH, I-80/OH-Tpk and I-90/SR-2 are less than a mile apart. Route 57 has exits with both roads, serving as a Breezewood of sorts for WB I-80 movements.
In at least two locations in Nassau County, NY, the Long Island Expwy and the Northern State Pkwy are separated by little more than a service road. Route 106 in Jericho has full cloverleaf interchanges with both highways, separated by maybe 200ft.
Similarly, in Queens, or just under 2 miles the Grand Central Pkwy and the Van Wyck Expwy run about 1/4 mile apart.
Quote from: webny99 on July 02, 2019, 09:32:41 PM
How close do they need to be? For example, would I-95 and the Merritt Pkwy be too far apart to qualify?
I would think that if you could throw a baseball from one and hit the nearest lane of the other, that would qualify.
Not Side-by-Side a la I-88/I-355, but one inside the other, I-85 inside I-285 just SW of the ATL airport. And similarly, I-76 runs inside of I-295 for a short bit in NJ
And, of course, the Dulles Access Rd and the Dulles Toll Road, in Northern VA
Quote from: sprjus4 on July 02, 2019, 08:57:31 PM
I-95 and I-295 around Richmond, VA - they get pretty close south of Downtown Richmond but don't actually join back for 30 or so miles.
Florida's Turnpike and I-95 are side by side for a while but then diverge. There's no direct connection between them either - very similar situation to I-295 and the NJ Turnpike.
Baltimore-Washington Pkwy and I-95 between Washington, D.C. and Baltimore, MD. Also add US-29 north of the Intercounty Connector to that mix to create three limited-access highways parallel to each other
Here's something interesting to switch it up a bit - a 1.5 mile stretch of Tidewater Drive in Ocean View in Norfolk, VA is a 30-40s style limited-access highway, and parallel to it is the more modern I-64. Technically, it's allowed by the OP as Tidewater Drive is technically a limited-access highway.
I wouldn't include I-95 and BW Parkway. They are too far apart compared to other examples. I think to qualify, the edge of one freeway needs to be within 1/4 mile of the edge of the other, literally side by side.
Quote from: mrsman on July 05, 2019, 02:08:34 PM
I think to qualify, the edge of one freeway needs to be within 1/4 mile of the edge of the other, literally side by side.
Well then good luck getting any submissions... I'm pretty sure all of them have been said then.
Three examples that I thought of:
I-35E and I-30 in Dallas. The two roadway mainlines briefly both go under the Houston and Jefferson viaducts separately. There are also ramp connections as part of the interchange of course.
The sections of I-5 and US 101 in Los Angeles between 4th Street and the merge of I-5 and US 101. Now it is all part of one big interchange, from my reckoning, US 101 diverges from I-5 at about the Euclid Ave bridge. The two freeways are closely parallel through the E LA interchange structure, all the way to 4th Street a distance of 1.5 miles. (At 4th street they are still less than 1/4 mile apart, but 3 city blocks)
In Long Island, there are many sections where I-495 is up close and personal with the Northern Parkway. One example is the section between Shelter Rock Rd and Willis Ave. in Manhasset.
Another thing that is interesting is that many of the highways listed above involve toll roads. This is by design, I believe, because of the delays involved in paying tolls through booths, the highway departments wanted to keep the toll traffic away from the free traffic. So to the extent that the Fl Tpke and I-95 share the same ROW, it does not make sense to join the two roadways to have them diverge later. Rather, they run as two separate roadways.
Quote from: mrsman on July 05, 2019, 02:27:47 PM
So to the extent that the Fl Tpke and I-95 share the same ROW, it does not make sense to join the two roadways to have them diverge later. Rather, they run as two separate roadways.
IIRC, they actually did share the same pavement for a while until they later decided to build I-95 as a new facility due to congestion, and the fact that I-95 traffic dumped onto the Turnpike had to pay the tolls.
Not like this doesn't exist other places though.
Quote from: sprjus4 on July 05, 2019, 02:11:00 PM
Quote from: mrsman on July 05, 2019, 02:08:34 PM
I think to qualify, the edge of one freeway needs to be within 1/4 mile of the edge of the other, literally side by side.
Well then good luck getting any submissions... I'm pretty sure all of them have been said then.
That may very well be the case, a topic like this will have a finite number of answers.
US 29 and I-95 in the MD suburbs of DC are more than 2 miles apart at their closest point, so it really can't qualify under any metric of this subject.
But I thought of a few others:
I-395 and VA 27 by the Pentagon.
I-66 and Geo Washington Pkwy in Rosslyn, VA.
VA-110 and Geo Washington Pkwy also in the same general area.
Rock Creek Pkwy runs close to I-66 on the DC side, but it's debatable whether this should count as limited access since there are some deficincies in its freeway qualities.
The same can be said for certain Jersey Freeways, like US 46 near I-80 and US 22 near I-78.
Pulaski Skyway and NJTP.
I-80 and I-580 in Richmond, CA.
---------------
It is interesing the way that Fl Tpke and I-95 history have come about. When planning the interstate system, many northeastern states specifically piggybacked onto the existing turnpikes to avoid having to build new highways on certain corridors. [Think of I-70 along the Penn Tpke for example.] In my mind, that would make sense in FL between Palm Beach Gardens and Fort Pierce. Obviously the part of the roadway that was both I-95 and FL Tpke would have enough lanes to carry the traffic load. It would force everyone to pay toll, though, and it does eliminate a major shunpiking competition.
A similar idea would not have helped I-295 and NJTP. In that case, there are too many local exits that the highway authority wanted to serve, making a widening of the NJTP impractical. If the NJTP were built in the era of electronic tolling, I would imagine that there would not be an I-295 in NJ. We would instead have a wider NJTP with multiple exits servicing the NJ suburbs of Philly.
Quote from: TheStranger on July 03, 2019, 12:09:21 AM
There aren't too many California examples of this (I'm very specifically excluding closely parallel freeways like say US 101/I-280 through San Bruno, I-805 and I-5 in San Diego, or 880 and 580 through Oakland), but some do come to mind, mostly due to an older freeway being supplanted by a modern alignment nearby.
- Pacific Highway (former US 101) and I-5/San Diego Freeway near Lindbergh Field (San Diego International Airport)
- Kearny Villa Road (former US 395 and I-15) and modern I-15 through Miramar MCAS
- Oak Grove Drive (former Route 118) and the modern I-210/Foothill Freeway in Altadena
How about I-15 and I-805 in San Diego
Quote from: ilpt4u on July 16, 2019, 03:04:20 AM
Quote from: TheStranger on July 03, 2019, 12:09:21 AM
There aren't too many California examples of this (I'm very specifically excluding closely parallel freeways like say US 101/I-280 through San Bruno, I-805 and I-5 in San Diego, or 880 and 580 through Oakland), but some do come to mind, mostly due to an older freeway being supplanted by a modern alignment nearby.
- Pacific Highway (former US 101) and I-5/San Diego Freeway near Lindbergh Field (San Diego International Airport)
- Kearny Villa Road (former US 395 and I-15) and modern I-15 through Miramar MCAS
- Oak Grove Drive (former Route 118) and the modern I-210/Foothill Freeway in Altadena
How about I-15 and I-805 in San Diego
805 and 15 aren't really parallel though, they cross right before 15 ends in Barrio Logan.
SAMSUNG-SM-G930A
Considering the OP starts off with I-88 and I-355 in Chicagoland (Downers Grove), IL...I-805 and I-15 parallel segment and interchange looks very similar to that of I-355 and I-88, at least on a map anyway
Quote from: Roadgeekteen on July 02, 2019, 09:55:08 PMMA 24 and MA 79
I'm not sure if such would count. I believe the OP's asking for highways that have segments that come very close to another adjacent highway but
not ending at such. The only area where 24 and 79 come close together is at the interchange (Exit 7 off MA 24) where the two routes run concurrently north for about 3 miles.
Quote from: zzcarp on July 02, 2019, 11:02:31 PM
It may be too short for this thread, but I-80/Ohio Turnpike and I-271 run adjacent through the Cuyahoga River valley north of Akron:
https://www.google.com/maps/search/41.252654,+-81.581119?sa=X&ved=2ahUKEwikqtug35fjAhWHGM0KHc3VBMIQ8gEwAHoECAoQAQ (https://www.google.com/maps/search/41.252654,+-81.581119?sa=X&ved=2ahUKEwikqtug35fjAhWHGM0KHc3VBMIQ8gEwAHoECAoQAQ)
Also, I believe that the Indiana Toll Road and I-80/94 could count between their interchange and I-65.
https://www.google.com/maps/place/41%C2%B034'37.8%22N+87%C2%B015'48.9%22W/@41.577169,-87.2657707,17z/data=!3m1!4b1!4m14!1m7!3m6!1s0x0:0x0!2zNDHCsDE1JzA5LjYiTiA4McKwMzQnNTIuMCJX!3b1!8m2!3d41.252654!4d-81.581119!3m5!1s0x0:0x0!7e2!8m2!3d41.5771649!4d-87.263582 (https://www.google.com/maps/place/41%C2%B034'37.8%22N+87%C2%B015'48.9%22W/@41.577169,-87.2657707,17z/data=!3m1!4b1!4m14!1m7!3m6!1s0x0:0x0!2zNDHCsDE1JzA5LjYiTiA4McKwMzQnNTIuMCJX!3b1!8m2!3d41.252654!4d-81.581119!3m5!1s0x0:0x0!7e2!8m2!3d41.5771649!4d-87.263582)
I'm not sure the Toll Road and 80/94 fit the criteria. They parallel each other for a bit before intersecting, but they aren't close enough to each other to see one from the other.
Quote from: jeffandnicole on July 02, 2019, 09:16:54 PM
Quote from: oscar on July 02, 2019, 08:46:25 PM
I-295 and the New Jersey Turnpike run parallel in several segments east of Camden NJ. They are close enough you can see 295 from the Turnpike.
At their closest point you can't fit a football field width-wise between them.
I remember driving up the NJ Turnpike as a little kid in the backseat during one of our semi-annual visits to New England and one year there was "suddenly" another freeway with brand new signs that you could see from the NJTP. This was in the early 1970s. Those signs had button-copy because they would sparkle like stars in the early morning light. That part of the NJTP was lacking in exits or any other points of interest (aside from trees), so I really studied that other road and found it so strange that there was no way to get to it. You could see it there for a number of miles too.
There appears to be a new toll road that is soon to open in the western portion of El Paso, TX that runs parallel to I-10 from just west of downtown, through the UTEP area and almost to the New Mexico border. Brand new signs (with clearview :rolleyes:) can be seen from I-10.
Quote from: StogieGuy7 on July 16, 2019, 01:14:16 PM
There appears to be a new toll road that is soon to open in the western portion of El Paso, TX that runs parallel to I-10 from just west of downtown, through the UTEP area and almost to the New Mexico border. Brand new signs (with clearview :rolleyes:) can be seen from I-10.
One better in El Paso: Texas Loop-375 on the Texas side, Avenida Rafael Pérez Serna on the Mexican side.
For about a mile, I-85 runs in what is essentially the median of I-285 southwest of Atlanta Hartsfield-Jackson Airport with connector/feeder ramps outside of the two in an insane basket-weave with each other and with Ga. 14 on the west end - and an exit for Old National Highway (Ga. 279) in the middle of it all.
I-55/I40 in West Memphis.
Would I-376 and PA 885 count?
US1/I295 in Langhorne PA out by Sesame Place
East of Xi'an, we have G40 in close proximity to... G40?! Huaxuzhen
Lantian, Xi'an, Shaanxi, China
https://maps.app.goo.gl/9XFReE44ZFAMmH1y9
I-81 and I-476 in the Scranton area also come to mind.
Quote from: mhking on July 16, 2019, 02:14:26 PM
For about a mile, I-85 runs in what is essentially the median of I-285 southwest of Atlanta Hartsfield-Jackson Airport with connector/feeder ramps outside of the two in an insane basket-weave with each other and with Ga. 14 on the west end - and an exit for Old National Highway (Ga. 279) in the middle of it all.
I-85 and GA 13 on the other side of Atlanta
They already mentioned here in Europe there are lots of examples. The first one that came to my mind was AP-7 and A-2 near Barcelona.
Another example that quickly came to mind is G4 and S1 near Zhengzhou, Henan, China.
Quote from: kurumi on July 03, 2019, 11:04:25 AM
(slight derail: in Japanese, 空 means sky (or empty, etc.), and 港 means harbor. Combine them, and 空港 means airport, so Sky Harbor Airport would be 空港空港.)
Same in Chinese, but Sky Harbor Airport would be 空港机场 instead, the last two characters meaning literally "machine field".
Quote from: TheGrassGuy on November 26, 2019, 03:53:50 PM
East of Xi'an, we have G40 in close proximity to... G40?! Huaxuzhen
Lantian, Xi'an, Shaanxi, China
https://maps.app.goo.gl/9XFReE44ZFAMmH1y9
It's G40 and G70 nearby. Although I don't know how that is signed. Possibly the Southern, older expressway has been demoted to national highway G312, and both G40 and G70 (an useless concurrency, as G40 ends in Xi'an with G70 continuing to Yinchuan) are now in the Northern, newer expressway (a 2x4 no less, they are popping up all over China now).
The Belt Parkway and 278 are kind of parallel in Bay Ridge, Brooklyn. Also the Southern State and Sunrise Highway in Islip.
Slightly unrelated, in Pleasantville, NY, when on the southbound Taconic, northbound 9A/100 appears on the right making it look like the Taconic's carriageway is on the "wrong" side: https://www.google.com/maps/@41.1244756,-73.809883,3a,69.1y,161.26h,90.04t/data=!3m6!1e1!3m4!1stwD1jiwAIH9cf7fW9Irgew!2e0!7i16384!8i8192
It's not very visible from here (screw you, Google Maps), but "Middle Ring Rd South Line" in Kunshan, Jiangsu, China is a free urban-maintained limited-access highway running parallel to G2/G42, two tolled national expressways in a multiplex.
https://www.google.com/maps/@31.3437714,120.913297,12z
Do limited-access at-grade expressways count? If so, I-90 and CR 1416 in Box Elder, South Dakota, the former of which replaced the latter.
Quote from: X99 on December 03, 2019, 07:50:39 PM
Do limited-access at-grade expressways count? If so, I-90 and CR 1416 in Box Elder, South Dakota, the former of which replaced the latter.
What's up with the giant median of the latter?
Quote from: TheGrassGuy on December 03, 2019, 08:06:09 PM
Quote from: X99 on December 03, 2019, 07:50:39 PM
Do limited-access at-grade expressways count? If so, I-90 and CR 1416 in Box Elder, South Dakota, the former of which replaced the latter.
What's up with the giant median of the latter?
The westbound lanes seem to be newer construction. Perhaps they were originally planning on running I-90 on CR 1416 and building a new eastbound carriageway in the median, with the existing carriageway becoming a frontage road for the south side.
Quote from: Roadsguy on December 03, 2019, 09:27:25 PM
Quote from: TheGrassGuy on December 03, 2019, 08:06:09 PM
Quote from: X99 on December 03, 2019, 07:50:39 PM
Do limited-access at-grade expressways count? If so, I-90 and CR 1416 in Box Elder, South Dakota, the former of which replaced the latter.
What's up with the giant median of the latter?
The westbound lanes seem to be newer construction. Perhaps they were originally planning on running I-90 on CR 1416 and building a new eastbound carriageway in the median, with the existing carriageway becoming a frontage road for the south side.
A look at Historic Aerials shows that both sides are roughly the same age. From what I heard, the wide median was put in place to allow large trucks to turn off onto other roads without their trailers blocking the through lanes.
The current plan is to rebuild the road as a three-lane undivided, I think off of the westbound carriageway, with the eastbound one removed. In my opinion, it should be five-lane undivided, since all four lanes are utilized during rush hour. Exit 63 also needs to be rebuilt since it only serves one direction, but the current plans for the interchange show 1416 with nearly all of its wide median intact, becoming a four-lane undivided road through the West Gate Road intersection and the interchange.
I-69/US 59 and Westpark Tollway are parallel for about 5-6 miles.
I-30 and Chrisholm Trail Parkway are also paralleled for a bit.
I-10 and I-45 are intertwined for a little bit in downtown Houston
Mods, I propose a merge with this thread (https://www.aaroads.com/forum/index.php?topic=26312.0). It's more general.
Quote from: TheGrassGuy on January 27, 2020, 08:16:56 AM
Mods, I propose a merge with this thread (https://www.aaroads.com/forum/index.php?topic=26312.0). It's more general.
The two topics are different.
This one is regarding two separate facilities that run near each other, the other is regarding one facility with multiple carriageways carrying different designations.
Quote from: sprjus4 on January 27, 2020, 07:05:35 PM
Quote from: TheGrassGuy on January 27, 2020, 08:16:56 AM
Mods, I propose a merge with this thread (https://www.aaroads.com/forum/index.php?topic=26312.0). It's more general.
The two topics are different.
This one is regarding two separate facilities that run near each other, the other is regarding one facility with multiple carriageways carrying different designations.
I know. But the topic of this thread has turned out to be a subtopic of my thread, and it looks like we're citing the same examples, such as I-85 and I-285 in Atlanta.
Quote from: TheGrassGuy on January 28, 2020, 06:37:22 AM
I know. But the topic of this thread has turned out to be a subtopic of my thread, and it looks like we're citing the same examples, such as I-85 and I-285 in Atlanta.
This thread was here long before the one you linked was. Also... your thread?
Northern State Pkwy and I-495 on Long Island are 150 feet apart at one point.
Here's one that I've actually posted a lot about on these forums, yet hadn't thought of putting in this thread until now:
the South Luzon Expressway and the southern portion of the Metro Manila Skyway, in southern Metro Manila (essentially from the west edge of the city of Makati to the Alabang district in the suburb of Muntinlupa).
https://www.google.com/maps/search/Buendia+Avenue+%26+South+Superhighway,+Makati/@14.5556947,121.0089281,16.96z
It's actually an intriguing example for a few key reasons:
- the original Skyway section from Alabang to Buendia (Gil Puyat) Avenue in Makati is essentially similar in function to say the express lanes of the NJTP or the elevated HOV/bus lanes of the Harbor Freeway in south central Los Angeles (or for another example, the Dulles Toll Road vs. Dulles Greenway). This IIRC will also be true for the segment of the Skyway being built south of Alabang.
- However, the portions of Stage 3 of the Metro Manila Skyway that exist north of Buendia Avenue (from there to the current north terminus in the Paco district of Manila, and eventually to the final north terminus in the Balintawak area of Quezon City at the North Luzon Expressway) are much more like say the Gowanus section of I-278 in Brooklyn or the former Cypress Freeway portion of I-880 in Oakland, a standalone viaduct using primarily the rights-of-way of the existing street grid below. The permanent north terminus for SLEX is at Buendia Avenue, where it becomes the surface boulevard Osmena Highway.
- The future north terminus of the Metro Manila Skyway may be set up similarly as a median route like the SLEX segment, as I recall that the terminus won't be the Balintawak cloverleaf itself but maybe a mile north of EDSA at a separate interchange with NLEX.
Quote from: TheStranger on February 04, 2020, 02:55:56 PM
Here's one that I've actually posted a lot about on these forums, yet hadn't thought of putting in this thread until now:
the South Luzon Expressway and the southern portion of the Metro Manila Skyway, in southern Metro Manila (essentially from the west edge of the city of Makati to the Alabang district in the suburb of Muntinlupa).
https://www.google.com/maps/search/Buendia+Avenue+%26+South+Superhighway,+Makati/@14.5556947,121.0089281,16.96z
It's actually an intriguing example for a few key reasons:
- the original Skyway section from Alabang to Buenia (Gil Puyat) Avenue in Makati is essentially similar in function to say the express lanes of the NJTP or the elevated HOV/bus lanes of the Harbor Freeway in south central Los Angeles (or for another example, the Dulles Toll Road vs. Dulles Greenway). This IIRC will also be true for the segment of the Skyway being built south of Alabang.
- However, the portions of Stage 3 of the Metro Manila Skyway that exist north of Buendia Avenue (from there to the current north terminus in the Paco district of Manila, and eventually to the final north terminus in the Balintawak area of Quezon City at the North Luzon Expressway) are much more like say the Gowanus section of I-278 in Brooklyn or the former Cypress Freeway portion of I-880 in Oakland, a standalone viaduct using primarily the rights-of-way of the existing street grid below. The permanent north terminus for SLEX is at Buendia Avenue, where it becomes the surface boulevard Osmena Highway.
- The future north terminus of the Metro Manila Skyway may be set up similarly as a median route like the SLEX segment, as I recall that the terminus won't be the Balintawak cloverleaf itself but maybe a mile north of EDSA at a separate interchange with NLEX.
Wowzers! So in the sections like the NJTP, there are really six lanes: two express, two local, and two service roads for each direction. Always imagined there existing some sort of setup like that somewhere, yet couldn't name a real-world example till now.
As for the type north of Buendia Ave, however, those are actually very common in Shanghai, China, and some other nearby cities. They are known as elevated roads, and they have characteristic green-on-white signs (as opposed to white-on-green for regular expressways). Here in our country, though, they're harder to find (and for good reason too :D). I guess the closest approximation you'll get to their frequency in China would be in Texas (where nearly every freeway has service roads), New York City, or New Orleans, but that isn't as true of an approximation of the majority of elevated roads in Shanghai (except for maybe the Middle Ring Rd and Wuzhou Ave, and even then, they don't have "elevated" in their correct names).