US Routes that terminate as freeways

[SkyPesos]

Unless I don't remember things properly, US 68's northern terminus in Ohio at I-75 counts.

Google Maps mark it as an expressway, but besides a single RIRO, I don't think there are any at-grade intersections on that part of US 68 between OH 15 and I-75.

And either way, this thread already have plenty of expressway examples, especially those that are just so close to being a freeway.

[TheStranger]

US-101 in Los Angeles terminates at the East LA Interchange as the Hollywood freeway connecting to the I-5 Santa Ana Freeway. Initially US-101 was supposed to terminate at the US-Mexico border in San Ysidro with Tijuana until the 1964 renumbering.

US 101 at that point is the northern continuation of the Santa Ana Freeway, up until the Four-Level at 110.  And pretty much 99% of I-5 between there and San Ysidro was indeed built as either US 101 or as concurrent US 101/I-5, with the concurrency being gradually removed in northern San Diego County and southern Orange County ca. 1968.

US-50 is freeway for roughly half its length through California. It starts in West Sacramento and is quickly concurrent with CA-99/I-80 Business Loop.

As of 2016, other than some stray onramp signage in West Sacramento, none of US 50 is concurrent now with Business 80 (which only now applies to the Route 51/former US 99E segment).

[lepidopteran]

US-29's northern end in Ellicott City, MD, at a T-intersection with MD-99.  This is less than a half mile past the (almost) freeway-to-freeway interchange with I-70.  Why "almost"?  NB 28 does have a signalized left turn to get on to WB 70.  Not sure if that's enough to undermine the "terminate as freeway" status, but does anyone know what that left turn is there for in the first place?  That same movement is covered by a perfectly good loop ramp.

[Bickendan]

It should be noted that both of US 101's southern termini qualify

[SkyPesos]

It should be noted that both of US 101's southern termini qualify

Assuming that US 50 ended at US 101 in SF the same way I-80 does now, same could be said about both of US 50's western terminus.

[TheStranger]

It should be noted that both of US 101's southern termini qualify

Assuming that US 50 ended at US 101 in SF the same way I-80 does now, same could be said about both of US 50's western terminus.

Correct.  In fact, when US 50 (along the San Francisco Skyway) ended at the Central and Bayshore Freeway alignments of US 101, it did so with US 40 - so 40 also fits as having freeway segments for its two most recent western termini.

[hotdogPi]

US 40 and US 50 only have one western terminus each, and the eastern terminus is not a freeway for either one.

[BrianP]

US-29's northern end in Ellicott City, MD, at a T-intersection with MD-99.  This is less than a half mile past the (almost) freeway-to-freeway interchange with I-70.  Why "almost"?  NB 28 does have a signalized left turn to get on to WB 70.  Not sure if that's enough to undermine the "terminate as freeway" status, but does anyone know what that left turn is there for in the first place?  That same movement is covered by a perfectly good loop ramp.

Two reasons that I can think of: first that loop ramp could backup due to volume since most drivers go onto I-70 E at that point and the slow speed you have to take on that ramp.  Also it's easier to merge on I-70 E using the left turn since that ramp has no loop and it has a longer acceleration section. 

[TheStranger]

US 40 and US 50 only have one western terminus each, and the eastern terminus is not a freeway for either one.

US 50's previous western terminus was US 101; since 1964 it has had two different termini at I-80 (in Oak Park, Sacramento and now in West Sacramento) - all of which were freeway-to-freeway junctions.

US 40's previous western terminus was US 101 in SF; now I-80 in Park City, also both freeway junctions.

I was under the assumption that the "US 101 southern terminus" post referred to US 101's old San Ysidro terminus as well as the current East Los Angeles one, though I can see the semantics for that referring to Olympia.

[Some one]

US 54 western/southern terminus at SH 375.

[Quillz]

US 40 and US 50 only have one western terminus each, and the eastern terminus is not a freeway for either one.

US 50's previous western terminus was US 101; since 1964 it has had two different termini at I-80 (in Oak Park, Sacramento and now in West Sacramento) - all of which were freeway-to-freeway junctions.

US 40's previous western terminus was US 101 in SF; now I-80 in Park City, also both freeway junctions.

I was under the assumption that the "US 101 southern terminus" post referred to US 101's old San Ysidro terminus as well as the current East Los Angeles one, though I can see the semantics for that referring to Olympia.

Yes, I assume he was referring to US-101's "northern" terminus being farther south than its northernmost extent. But in either instance, it's still correct, whether San Ysidro or Olympia, it's a freeway-to-freeway connection.

[bugo]

Depending on where it gets truncated to, US 271 may end up ending as a freeway on the north end.