Which highways have been re-aligned onto a freeway, cross over/under a previous routing (excluding TEMP routings), but without an interchange between the two roads?
US 6 has a previous alignment along Hohman Ave in Munster, crossing under I-80/94 (carrying the current alignment of US 6) with no interchange.
US 31 has a previous alignment along Madison Ave in Indianapolis, crossing over I-465/74, which currently carries US 31.
Another one that technically fits is that the current alignment of US 150 along I-64 in Louisville passes over the K&I bridge, that used to carry US 150 but no longer carries vehicles at all so obviously there is no interchange.
There's at least one instance of this (possibly more) on US 15 in northern Pennsylvania.
Several examples in Michigan:
US-31 in Mason County: https://www.google.com/maps/@43.8507779,-86.3959647,16.13z
US-31 in Oceana County: https://www.google.com/maps/@43.4787854,-86.3462206,16.04z
US-131 in Wexford County (three times!): https://www.google.com/maps/@43.4787854,-86.3462206,16.04z, https://www.google.com/maps/@44.3286741,-85.403248,16.25z, and https://www.google.com/maps/@44.3726351,-85.3972959,16.25z
US-127 in Jackson County: https://www.google.com/maps/@42.2712292,-84.4170343,16.17z (US-127 is concurrent with I-94 here)
This one used to qualify in Eaton County until US-27 was removed from I-69 (and Michigan as a whole): https://www.google.com/maps/@42.606132,-84.7689132,16.21z
The two I know about for Iowa:
1. Now that US 6 has been rerouted onto I-80 in Council Bluffs, it now passes over McPherson Avenue, the old pre-interstate alignment of US 6.
2. Lewis Blvd. in Sioux City passes under US 75. It's too close to the I-29/I-129/US 20/US 75 interchange to get an exit.
Quote from: froggie on September 07, 2020, 08:25:21 PM
There's at least one instance of this (possibly more) on US 15 in northern Pennsylvania.
Yeah, that's the first road that came to mind when I clicked this thread.
I believe this (https://www.google.com/maps/@41.694264,-77.0749891,3a,57.5y,138.17h,89.02t/data=!3m7!1e1!3m5!1sH6DgCn9b15uP0S5DgbBEsQ!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DH6DgCn9b15uP0S5DgbBEsQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D254.65834%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656!5m1!1e1?hl=en) could be the one you're referring to. Further south, there's this single ramp (https://www.google.com/maps/@40.7695305,-76.8665669,17z/data=!5m1!1e1?hl=en), with no northbound access to the old alignment until PA 35.
There's a number of these in Western Maryland, where US 40 (realigned onto an overlap with I-68) crosses over and under the National Pike now signed as Alt US 40/Scenic US 40/MD 144 depending on the location. Here's one of the bigger examples (https://www.google.com/maps/@39.6745041,-78.6902949,3a,75y,300.96h,87.78t/data=!3m6!1e1!3m4!1s2fIZyGURTZlHKQgRJ8qNsg!2e0!7i13312!8i6656?hl=en).
I-5/CA 33 does over Derrick Road north of Coalinga.
At least once for WV 55 (US 48/Corridor H) between Moorefield and Wardensville.
US 50 crosses Folsom Blvd 3 times east of Sacramento.
US 50 does this just south of I-64 (where US 50 used to run on St. Clair Avenue) near East St. Louis. (https://goo.gl/maps/4CjuGZFLZn1Mr9GM8)
Old US 51 crosses I-57/US 51 near Mounds, IL just north of Cairo
Quote from: cabiness42 on September 07, 2020, 07:52:59 PM
Which highways have been re-aligned onto a freeway, cross over/under a previous routing (excluding TEMP routings), but without an interchange between the two roads?
US 6 has a previous alignment along Hohman Ave in Munster, crossing under I-80/94 (carrying the current alignment of US 6) with no interchange.
US 31 has a previous alignment along Madison Ave in Indianapolis, crossing over I-465/74, which currently carries US 31.
Another one that technically fits is that the current alignment of US 150 along I-64 in Louisville passes over the K&I bridge, that used to carry US 150 but no longer carries vehicles at all so obviously there is no interchange.
The US 31 freeway also crosses over its old alignment just south of South Bend with no interchange.
CA 118 crosses over Foothill Boulevard at its current eastern terminus
US 30 expressway crosses over (or under) Lincoln Hwy (aka Old US 30) a couple of times between the Ohio/Indiana state line and Delphos, Ohio, and again east of Wooster.
US 220 does south of Altoona, PA where the current route does cross over in a rural part of the area over old US 220 (now a local named road) without an interchange.
US 65 & US 24 cross over Old US 24 in Carrollton, MO.
Old IL Rt 53 (before it was I-355) crosses over IL Route 53 Rohlwing Rd just south of I-290 in Addison with no interchange. I believe this is the rare instance of a route being on a freeway or expressway and moved off of it later.
I wonder... how many times does MA-128 cross over its pre-freeway alignment without an exit?
There's also no specific Robert St. exit off I-94 while it's multiplexed with US-52.
In the western end of Wayzata, MN, Wayzata Blvd. crosses the US-12 freeway without an interchange.
MN-77 (Cedar Ave) also crosses Nicols Rd (formerly Cedar Ave) on the south banks of the Minnesota River without an exit.
I-5 crosses over the former US 99W alignment south of Williams without a interchange; the nearest ones on other crossing roads are about a half-mile south and a mile north. North of there, north of Maxwell, it crosses that same alignment, but does provide SB off/NB on diamond ramps but none for opposite movements (there is a parallel RR track to old US 99W there).