Limited-access highways that pass over each other without an interchange

[CoreySamson]

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).

[OCGuy81]

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.

[CoreySamson]

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.

[TheGrassGuy]

I-80 and I-476... technically

[jp the roadgeek]

(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.

[hbelkins]

I-80 and I-476... technically

In that same vein, I-81 and I-476 south of Wilkes-Barre.

[TheGrassGuy]

I-80 and I-476... technically

In that same vein, I-81 and I-476 south of Wilkes-Barre.

Already listed

[webny99]

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).

[SkyPesos]

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.

[BridgesToIdealism]

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.

[BridgesToIdealism]

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.

[Occidental Tourist]

I-5 and CA 261 in Irvine.

[GaryV]

... 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.

[TheGrassGuy]

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?

[BridgesToIdealism]

... 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".

[GaryV]

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.

[zachary_amaryllis]

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.

[TheGrassGuy]

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.