What are some examples of two limited-access highways passing over each other without any type of direct interchange? Doesn't have to be Interstate, just limited-access.
Off the top of my head, I can think of:
- Merritt Parkway and CT 40
- I-76/PA Turnpike east of Harrisburg, which actually occurs twice: once at PA 283 and again at the Harrisburg Airport Connector
- Ohio Turnpike at OH 11, I-271, and I-475
- I-95 and Florida's Turnpike south of Port St. Lucie. While this technically also occurs twice, the flyover at Fort Pierce features an indirect connection.
(Edit: deleted examples of indirect access per refined topic question)
I'm sure there are others, those are the ones that immediately come to mind.
I-90 and I-391 in Massachusetts
I-95 and I-295 in NJ is interesting because I-95 crosses over its own child (which ends at it on both ends) without an interchange.
I-880 and CA 87, San Jose. There have been proposals for a partial interchange, but the location next to a river and airport makes it tricky.
US 169 and US 212, Edina, MN
Quote from: BridgesToIdealism on January 30, 2021, 09:19:39 PM
- I-81 and I-476/Northeast PA Turnpike
- PA Turnpike at the transition point between I-76 and I-276, which passes over US 422
- I-76/PA Turnpike east of Harrisburg, which actually occurs twice: once at PA 283 and again at the Harrisburg Airport Connector
- Several other interchanges on the I-76/PA Turnpike mainline, where the actual interchange dumps you out on a nearby surface road (I-81, I-70/Breezewood, I-99, US 219, US 119, and PA 28)
- Ohio Turnpike at OH 11, I-271, and I-475
- I-95 and Florida's Turnpike, which also occurs twice: once in Fort Pierce and again south of Port St. Lucie
I feel like just about every closed/ticked-based toll road is going to have these somewhere, although I can't think of any on the Indiana Toll Road off the top of my head. The Kansas Turnpike crosses three freeways where the connections are at least partially indirect (some more than others): US 54/400/Kellogg, K-96, and US 75.
We may have done this before, but ...
I-75 at US-30, Beaverdam OH - you have to get off the freeway and take a short section of the Lincoln Highway (OH 696).
I-71 and US-35 in southwestern Ohio. Access is required via SR 435 - the old US-35 alignment.
I-95 / US-70 Bypass in Selma, NC.
NJ Turnpike and NJ 42.
I-87 and US 209.
NJ Turnpike and NJ 133 sort of.
I-57 and I-294 in IL.
Quote from: roadman65 on January 31, 2021, 10:46:09 AM
I-57 and I-294 in IL.
For a long time, there was no interchange, but a partial one has been built. There are now SB->SB and NB->NB ramps.
Quote from: stridentweasel on January 31, 2021, 12:21:50 AM
The Kansas Turnpike crosses three freeways where the connections are at least partially indirect (some more than others): US 54/400/Kellogg, K-96, and US 75.
The KTA is currently constructing an interchange with US 54/400/Kellogg with a southbound exit and entrance to/from the west and a northbound entrance from the west.
K-96 is accessible from the turnpike via this: https://www.google.com/maps/@37.683113,-97.1959056,15z
Quote from: Great Lakes Roads on January 31, 2021, 01:32:53 PM
Quote from: stridentweasel on January 31, 2021, 12:21:50 AM
The Kansas Turnpike crosses three freeways where the connections are at least partially indirect (some more than others): US 54/400/Kellogg, K-96, and US 75.
The KTA is currently constructing an interchange with US 54/400/Kellogg with a southbound exit and entrance to/from the west and a northbound entrance from the west.
K-96 is accessible from the turnpike via this: https://www.google.com/maps/@37.683113,-97.1959056,15z
Many of the movements will still be indirect, involving at-grade intersections.
Quote from: TheHighwayMan394 on January 30, 2021, 11:33:38 PM
US 169 and US 212, Edina, MN
I wouldn't count that. Access between the two is still rather easy via the Crosstown...
I-78 and I-476
I-95 and I-895 near the north portals of the Fort Mac and Harbor Tunnels
I-195 and I-895 near BWI
Freeways that meet without an interchange (https://www.aaroads.com/forum/index.php?topic=4825.msg104955#msg104955)
I-75 and US-30 north of Lima, OH.
Let me refine the topic question a bit: what are examples of two limited access roads passing over each other without any interchange whatsoever, even indirect movements via frontage roads? (i.e. only looking for Merritt Pkwy @ CT 40-like examples). This eliminates all of the PA Turnpike cases except for PA 283 and the Harrisburg Airport Connector, but the Ohio Turnpike examples remain since OH 11, I-271, and I-475 don't even have indirect access to the Turnpike (the turnpike doesn't even have an interchange at any of their surface or frontage roads).
Quote from: DJ Particle on January 31, 2021, 11:35:13 PM
Quote from: TheHighwayMan394 on January 30, 2021, 11:33:38 PM
US 169 and US 212, Edina, MN
I wouldn't count that. Access between the two is still rather easy via the Crosstown...
Nah, cutting across that three lanes getting from SB 169 to WB 212 ain't my idea of easy. Especially when I'm trying to stay on 62 and have idiots buzzing across me on both sides! :no:
Self examples
NJ-495 at The Helix
Inner Ring Road at Nanpu Bridge in Shanghai
G5 in a tunnel in Sichuan
Quote from: BridgesToIdealism on February 03, 2021, 05:57:09 PM
(i.e. only looking for Merritt Pkwy @ CT 40-like examples).
Couldn't you use Dixwell Avenue?
Quote from: BridgesToIdealism on February 03, 2021, 05:57:09 PM
Let me refine the topic question a bit: what are examples of two limited access roads passing over each other without any interchange whatsoever, even indirect movements via frontage roads?...the Ohio Turnpike examples remain since OH 11, I-271, and I-475 don't even have indirect access to the Turnpike (the turnpike doesn't even have an interchange at any of their surface or frontage roads).
The Ohio Turnpike signs To I-475/US 23 at Exit 59/US 20, and it is a very short jog onto Dussel Drive over to I-475, and the "missing" connection between the interstates is well signed along US 20 and Dussel Dr
I-475/US 23 does not sign To OH Turnpike/I-80/90 for Exit 6/Dussel Dr, tho. To OH Turnpike/I-80/I-90 is signed at the end of the Exit Ramp/at the stoplight for the ramp on Dussel
Philippines examples:
C-5 South Link Expressway at Metro Manila Skyway, Paranaque. (C-5 and Skyway are proposed to be connected not at this spot but via a different expressway route, the SEMME/Southeast Metro Manila Expressway).
NAIAX & SLEX, Taguig. (NAIAX links to the Skyway but does not have any connection to the older surface-level highway.)
Quote from: hockeyjohn on January 31, 2021, 10:14:36 AM
I-71 and US-35 in southwestern Ohio. Access is required via SR 435 - the old US-35 alignment.
Similar one to that, with an access road connecting both ends of the US route and a diamond interchange with the interstate: I-70 and US 63 in Columbia, MO.
Florida's Turnpike crosses over I-95 at two separate points in South Florida (St. Lucie County) with no interchange.
Causeway Blvd in New Orleans passes over the Earhart Expy without interchange, although it's debatable whether Causeway Blvd is a freeway or not (I think it is).
What about Texas 249 and the northern section of the Grand Parkway. Looks like there aren't any connections? At least what I'm seeing on maps.
Quote from: OCGuy81 on February 08, 2021, 11:30:00 PM
What about Texas 249 and the northern section of the Grand Parkway. Looks like there aren't any connections? At least what I'm seeing on maps.
Frontage roads. I think that counts as a connection. Otherwise quite a few Houston interchanges would (or at least used to) qualify.
I-80 and I-476... technically
Quote from: CtrlAltDel on February 08, 2021, 05:25:56 PM
Quote from: BridgesToIdealism on February 03, 2021, 05:57:09 PM
(i.e. only looking for Merritt Pkwy @ CT 40-like examples).
Couldn't you use Dixwell Avenue?
It's a partial interchange northbound. CT 22 is the option southbound. But at that point, you might as well just use CT 22, which CT 40 functionally replaced.
Quote from: TheGrassGuy on February 09, 2021, 08:35:37 AM
I-80 and I-476... technically
In that same vein, I-81 and I-476 south of Wilkes-Barre.
I'm not sure how you classify NY 8/NY 12 over I-90 in Utica. It could potentially qualify based on the fact that the interchange with the Thruway is not directly connected (and it's over a mile east of the crossing).
Quote from: TheGrassGuy on February 09, 2021, 08:35:37 AM
I-80 and I-476... technically
In that case, I'll add on Breezewood. Not sure if it's true, but I heard from somewhere that PennDOT doesn't officially recognize the US 30 concurrency as part of I-70.
Noting that I had originally included Breezewood and the I-81/I-476 crossover, but I refined the topic question to exclude situations where the two roads are connected indirectly by surface streets or frontage roads, and to only focus on situations where the roads literally fly over or pass over each other with no connection whatsoever, direct or indirect.
Quote from: democratic nole on February 08, 2021, 11:09:12 PM
Florida's Turnpike crosses over I-95 at two separate points in South Florida (St. Lucie County) with no interchange.
This was included in my initial listing - though under the refined topic scope, only the southern flyover south of Port St. Lucie counts, since the northern flyover in Fort Pierce features an indirect connection via a surface street.
I-5 and CA 261 in Irvine.
Quote from: BridgesToIdealism on February 09, 2021, 09:05:52 PM
... only focus on situations where the roads literally fly over or pass over each other with no connection whatsoever, direct or indirect.
I submit that any crossing would fail this rule. You might have to go 17 miles or 29 miles or 43 miles out of your way, but eventually you'd be able to make an indirect connection.
Quote from: GaryV on January 31, 2021, 08:08:00 AM
We may have done this before, but ...
I-75 at US-30, Beaverdam OH - you have to get off the freeway and take a short section of the Lincoln Highway (OH 696).
US-30's not really a freeway?
Quote from: GaryV on February 10, 2021, 07:49:20 AM
Quote from: BridgesToIdealism on February 09, 2021, 09:05:52 PM
... only focus on situations where the roads literally fly over or pass over each other with no connection whatsoever, direct or indirect.
I submit that any crossing would fail this rule. You might have to go 17 miles or 29 miles or 43 miles out of your way, but eventually you'd be able to make an indirect connection.
Should have clarified. Looking for instances where you can't even make an indirect
adjacent connection. If you have to travel multiple miles that's hardly a "connection".
Quote from: TheGrassGuy on February 10, 2021, 10:31:45 AM
Quote from: GaryV on January 31, 2021, 08:08:00 AM
We may have done this before, but ...
I-75 at US-30, Beaverdam OH - you have to get off the freeway and take a short section of the Lincoln Highway (OH 696).
US-30's not really a freeway?
How long does a freeway have to be, to be considered a freeway? US-30 is limited access for a while on either side of I-75.
maybe... e-470/i-76? seems like at least in one direction you have to exit to us-85 or some other weirdness...
maybe not.
In Shanghai there's G1501/G1503 and Huaxia Elevated Road, S20 and Shenjiang/Dujiaqu Elevated Road, Yan'an Elevated Road and Middle Ring Road, S5 and S6, and S32 and Hongmei South Elevated Road.
In Suzhou there's G2's two underpasses with the Suzhou Middle Ring Road and two overpasses with the Kunshan Middle Ring Road, G2 and Jingyi Road (G312), and S9 and the Zixu Expressway. Furthermore, G15W/G1522 and Duhushu Ave and G15W/G1522 and the Loujiang Expressway are Hutchinson/I-287 situations. In Wuxi there's G2's two underpasses with Gaolang Elevated Road and Jincheng Elevated Road
Wujiang Ave in Wujiang, Suzhou also doesn't interchange with any of the limited-access highways it passes over/under.
G60 and S32 was also a former example, until a partial interchange was constructed between them.