Highways with big changes at state lines

[bugo]

US 75 is a 4 lane expressway in Oklahoma but is just a regular 2 lane highway in Kansas.

[Road Hog]

Before the late 1990s, US 65 turned from a curvy 2-lane with occasional passing lanes in Arkansas to a flat, straight Super-2 in Missouri. The transition was jarring.

[CtrlAltDel]

US 75 is a 4 lane expressway in Oklahoma but is just a regular 2 lane highway in Kansas.

The bit right at the border was four-laned at some point, and now lasts at least to Caney.

[bugo]

US 75 is a 4 lane expressway in Oklahoma but is just a regular 2 lane highway in Kansas.

The bit right at the border was four-laned at some point, and now lasts at least to Caney.

That tells you how long it's been since I have been north of Frank Phillips Blvd in Bartlesville.

[Hobart]

I remember this from somewhere else on this forum but I think it fits here.

https://www.google.com/maps/@42.59731,-88.3724939,13.68z

At the Wisconsin-Illinois state line, US-12's limited access freeway in Wisconsin suddenly stops at an incomplete diamond interchange, and the route makes a hard left onto a two-lane road into Illinois. Like, the setup is there for Illinois to continue the freeway, but Illinois just... didn't.

[zachary_amaryllis]

WY 10 at the co/wy line. WY 10 is a 2-lane paved road. on the colorado side, it's dirt larimer co rd 103.

https://goo.gl/maps/eeQpGcH3M7Lxwb4u6

[Max Rockatansky]

US 95 drops from a four lane expressway with 70 MPH speeds in Nevada to two lanes upon entering San Bernardino County California. 

[JayhawkCO]

US 95 drops from a four lane expressway with 70 MPH speeds in Nevada to two lanes upon entering San Bernardino County California.

This is literally the OP. 

[dvferyance]

US 20 is mostly a freeway in Iowa but entirely 2 lane in Nebraska.

[Joe The Dragon]

US 12 changes from a 1960s-era fully interstate compatible rural freeway to a completely inadequate local street and two lane highway when it crosses from Wisconsin into Illinois.

The s due to IDOT (and/or ISTHA?) never building the planned interstate compatible highway on their side of the state line.

Mike

it comes to an half exit ramp there is now an traffic light there.

[doorknob60]

This is a bit different than what OP was going for, but I-90 at the Montana/Idaho state line drops from 75 MPH to 55 MPH speed limit, which is, in fact, a big change. Though the conditions of the highway itself are pretty similar on either side. There are more examples of similar situations on specifically the ID/MT border, including a 70 to 45 on US-93.

[HighwayStar]

This is a bit different than what OP was going for, but I-90 at the Montana/Idaho state line drops from 75 MPH to 55 MPH speed limit, which is, in fact, a big change. Though the conditions of the highway itself are pretty similar on either side. There are more examples of similar situations on specifically the ID/MT border, including a 70 to 45 on US-93.

I-90 is only 70 on the Montana side

[MoiraPrime]

US 84 and US 98 and US 45 between Mississippi and Alabama are all like this.

All three are mostly divided 4 lane highways throughout Mississippi. The instant they cross into Alabama, 2 lane road.

US 82 also goes from a controlled access freeway in Mississippi to a normal divided highway in Alabama.

[DandyDan]

US 20 is mostly a freeway in Iowa but entirely 2 lane in Nebraska.

At the border, US 20 overlaps I-129, so there is no change at the border. US 20 doesn't become a 2 lane road until west of US 77, which is where I-129 ends.

[MATraveler128]

Does VA/NC 168 count? It is a freeway on the Virginia side, but becomes more of an expressway when you get to North Carolina. But there are stores right on the border, so I’m not sure.

[Dirt Roads]

Does VA/NC 168 count? It is a freeway on the Virginia side, but becomes more of an expressway when you get to North Carolina. But there are stores right on the border, so I'm not sure.

Most certainly. 

[hbelkins]

There's a pretty noticeable change on US 460 at the West Virginia/Virginia state line between Princeton and Pearisburg. The West Virginia side has a 65 mph limit, a wide median, and used to be concrete pavement (it may have been resurfaced with asphalt now, I can't remember for sure. The speed limit drops to 45 mph at the state line, the Virginia side is definitely asphalt, and the road's footprint narrows considerably. The road definitely goes from an expressway feel to more of a four-lane arterial. You can't exactly call Glen Lyn, Va., "urban," but the road certainly doesn't have the rural feel it does in West Virginia.

https://goo.gl/maps/f5FPHKSkDpsGDtjj9

[clong]

US 84 and US 98 and US 45 between Mississippi and Alabama are all like this.

All three are mostly divided 4 lane highways throughout Mississippi. The instant they cross into Alabama, 2 lane road.

US 82 also goes from a controlled access freeway in Mississippi to a normal divided highway in Alabama.

On the other side of AL, I-20 is 6 lanes until just before the GA line where it drops to 4 lanes for the first 24 miles in GA.

[WillWeaverRVA]

Does VA/NC 168 count? It is a freeway on the Virginia side, but becomes more of an expressway when you get to North Carolina. But there are stores right on the border, so I'm not sure.

Most certainly. 

It actually isn't even an expressway in NC, it's a 4-lane undivided road with a center turn lane, and it stays that way clear down to its terminus at US 158. Pretty big downgrade.

[US 89]

On the other side of AL, I-20 is 6 lanes until just before the GA line where it drops to 4 lanes for the first 24 miles in GA.

Which is pathetic, because Georgia just finished a multi-year construction project on that segment of I-20 and didn't bother to do any sort of widening...

[SkyPesos]

On the other side of AL, I-20 is 6 lanes until just before the GA line where it drops to 4 lanes for the first 24 miles in GA.

Sounds a bit like I-65 SB narrowing from 6 to 4 lanes crossing from KY to TN, then widening again not that far south when it goes closer to Nashville.

[Bruce]

US 395 is a full fledged freeway north of Reno, but once it crosses into CA it starts having at-grade intersections. Still remains a divided highway up to CA 70.

[Occidental Tourist]

For no reason, I started thinking about highways that, when they cross state lines, undergo a big change in their character -- for instance, from expressway to random road. The example that made me think of this is US 95 at the NV/CA border: In Nevada, it's a four-lane 75mph expressway (upgraded post-9/11 to be the Hoover Dam truck detour), but in California it's still basically the same dangerous narrow 1930s-era two-lane road with no paved shoulders, undulating up and over every tiny hill.

US 95 drops from a four lane expressway with 70 MPH speeds in Nevada to two lanes upon entering San Bernardino County California. 

Although one could assume the culprit is California's lack of foresight and public policy to ensure that the highway stays consistent from Boulder City to I-40, this may just be more of a result of the fact that the turnoff for Laughlin from US 95 is right at the border and that the AADT for travel between Vegas and Laughlin justifies four lanes to that point but the AADT between I-40 and Vegas does not.

[ErmineNotyours]

The only time I've driven on the East Coast is when I rented a car (actually a SmartCar Car2Go) and drove from Washington DC to Harpers Ferry.  I drove on divided highways and interstates most of the way until I did nearly the final stretch on US 340 from Maryland to Virginia.  Then it went from a divided highway to a narrow bridge with trucks coming at me.  The bridge is so narrow that the Appalachian Trail Conservancy recommended hikers not use it when the usual bridge across the Potomac River was destroyed in a derailment.  There does seem to be some walking space between the Jersey barrier and the bridge rails.  https://goo.gl/maps/PpZ1g8HiHs5fSUVB9

[Max Rockatansky]

For no reason, I started thinking about highways that, when they cross state lines, undergo a big change in their character -- for instance, from expressway to random road. The example that made me think of this is US 95 at the NV/CA border: In Nevada, it's a four-lane 75mph expressway (upgraded post-9/11 to be the Hoover Dam truck detour), but in California it's still basically the same dangerous narrow 1930s-era two-lane road with no paved shoulders, undulating up and over every tiny hill.

US 95 drops from a four lane expressway with 70 MPH speeds in Nevada to two lanes upon entering San Bernardino County California. 

Although one could assume the culprit is California's lack of foresight and public policy to ensure that the highway stays consistent from Boulder City to I-40, this may just be more of a result of the fact that the turnoff for Laughlin from US 95 is right at the border and that the AADT for travel between Vegas and Laughlin justifies four lanes to that point but the AADT between I-40 and Vegas does not.

Yes, the cause was AZ 68 and NV 163 becoming the truck bypass off Hoover Dam post 9/11.  There is surprisingly little traffic on US 95 north of I-40 until NV 163.