Highways that transit a state with water boundaries at both entry points

[1995hoo]

While the District of Columbia is not a state, the George Washington Memorial Parkway crosses water both times it enters/leaves the District when it crosses Columbia Island.

So do I-95 and I-495, since they both enter and leave the District of Columbia while on the Wilson Bridge over the Potomac.

Right. I didn't mention that because it was already mentioned in reply #5.

[US 89]

US 36 crosses the entire northern half of Missouri, from the Missouri River on the west side to the Mississippi River on the east. 136 is similar but doesn't quite make it to the Mississisppi in MO - instead, it briefly enters Iowa at the Des Moines River.

[ran4sh]

Also, I-495 counts not just for DC but for both Maryland and Virginia too

[JayhawkCO]

US 60/62 enters Illinois from Kentucky via crossing the Ohio and from Missouri crossing the Mississippi, just north of the confluence of the 2 rivers, and 60/62 are in Illinois for about all of a mile

Then US62 in Kentucky goes from there to crossing the Ohio River again into Ohio near Maysville.

Also, I don't think anyone has mentioned US52/US119 when it goes back and forth a couple of times over the Tug Fork between Kentucky and West Virginia.

Chris

[AlexandriaVA]

How about US-50 in Maryland starting at the Atlantic Ocean and ending at the the DC line on the Anacostia River?

It might technically be a stretch because the Anacostia River isn't the boundary between DC and MD - it's simply that the northeastern boundary (i.e. Eastern Avenue at times) of DC happens to intersect US-50 very close to the Anacostia.

DC-MD: https://www.google.com/maps/@38.9186272,-76.9406061,18z

Furthermore, US-50 doesn't start on the Atlantic, but instead about 2 blocks inland: https://www.google.com/maps/@38.3307953,-75.0858148,18z

[jmacswimmer]

How about US-50 in Maryland starting at the Atlantic Ocean and ending at the the DC line on the Anacostia River?

It might technically be a stretch because the Anacostia River isn't the boundary between DC and MD - it's simply that the northeastern boundary (i.e. Eastern Avenue at times) of DC happens to intersect US-50 very close to the Anacostia.

DC-MD: https://www.google.com/maps/@38.9186272,-76.9406061,18z

Furthermore, US-50 doesn't start on the Atlantic, but instead about 2 blocks inland: https://www.google.com/maps/@38.3307953,-75.0858148,18z

If the Anacostia DC-MD line counts, then you can also include US 50 in DC since it crosses the Potomac at the VA-DC line.

[paulthemapguy]

I think the only two US highways that work for Illinois are US67, which was mentioned earlier, and US50. I-64 also fits* this criterion for Illinois.  Illinois doesn't have any state routes that fit the criterion, and I'm interested to see if there are any state routes anywhere in the nation that do.

*Edited to remove mention of I-70

[hotdogPi]

I think the only two US highways that work for Illinois are US67, which was mentioned earlier, and US50.

60/62

[JayhawkCO]

I'm interested to see if there are any state routes anywhere in the nation that do.

Closest one I've found so far is IA9 which unfortunately jogs north before crossing the Big Sioux River into South Dakota.  It crosses the Mississippi into Wisconsin at Lansing on the east side.

Edit: Well, the eastern segment of GA94 crosses into Florida on both ends over the St. Mary's River.  It does continue with a disconnected route to the west, but that segment would at least qualify.

Double Edit: I saw that someone posted that up above and I missed it.

Chris

[SSOWorld]

US 10 transits WI from the St Croix/Mississippi junction at Minnesota to Michigan across Lake Michigan on the S.S. Badger Ferry (Mentioned above)
US 9 transits NJ from the Delaware Bay (Cape May Lewes Ferry from Deleware to the George Washington Bridge to NY(C)

From Sioux City southward - many routes cross Iowa between the Missouri to the Mississippi (I-80, US 20, US 30, US 34).  US 18 meets the Big Sioux and the Mississippi.  US 136  cuts through Iowa for a short distance and meets the Des Moines River and the Mississippi.  It then meets the Missouri on the other side of Missouri.  US 36 meets the Missouri and Mississippi on the Missouri lines

[hbelkins]

US 60/62 enters Illinois from Kentucky via crossing the Ohio and from Missouri crossing the Mississippi, just north of the confluence of the 2 rivers, and 60/62 are in Illinois for about all of a mile

Then US62 in Kentucky goes from there to crossing the Ohio River again into Ohio near Maysville.

And 60 crosses the Big Sandy into West Virginia.

[TheHighwayMan3561]

I'm interested to see if there are any state routes anywhere in the nation that do.

Closest one I've found so far is IA9 which unfortunately jogs north before crossing the Big Sioux River into South Dakota.  It crosses the Mississippi into Wisconsin at Lansing on the east side.

Edit: Well, the eastern segment of GA94 crosses into Florida on both ends over the St. Mary's River.  It does continue with a disconnected route to the west, but that segment would at least qualify.

Double Edit: I saw that someone posted that up above and I missed it.

Chris

IA 92 does.

[dgolub]

US 1 in NJ has the Delaware River with PA and the Hudson River with NY.

While we're at it, New Jersey's other big one, US 9, enters via the ferry at Cape May and leaves at the George Washington Bridge.

[roadman65]

I forgot MSR 121 in GA. It enters GA from Florida across the St Mary's River and leaves with US 1, US 25, US 78, and US 278 to cross the Savannah River.

[ilpt4u]

Illinois doesn't have any state routes that fit the criterion, and I'm interested to see if there are any state routes anywhere in the nation that do.

I would say IL 13, IL 15, IL 146, and even IL 1 come close, as does that *thing* we call IL 110

The western end of IL 13 doesn't make it all the way to the Mississippi. Western end of IL 15 gets closer to the river, deep into East St Louis, but it still comes up just shy of the river

The eastern end of IL 146 ends at IL 1 just north of Cave-in-Rock and the Ohio River

IL 1's northern end is in the city of Chicago on Halsted St, and even Halsted ends before reaching Lake Michigan

IL 110/CKC's northeast end appears to be the Jane Byrne Circle Interchange - even if it continued on Congress Parkway, it still would end before it reached Lake Michigan, at Grant Park and Buckingham Fountain

IL 3 comes very close to having both ends on the Mississippi River, but it ends both sides just shy of the riverfront, both in Cairo and in Grafton

[ran4sh]

It's interesting that no one can agree on what "transit a state" means for routes that end not at the border but merely near it.

[Bitmapped]

West Virginia has rivers all along the length of its borders with Ohio and Kentucky, and for a brief part of the Virginia border. US 52 enters West Virginia from Kentucky by crossing Tug Fork and exits to Ohio by crossing the Ohio River.

[JayhawkCO]

West Virginia has rivers all along the length of its borders with Ohio and Kentucky, and for a brief part of the Virginia border. US 52 enters West Virginia from Kentucky by crossing Tug Fork and exits to Ohio by crossing the Ohio River.

It also carries US119 on that stretch.  I posted it a little higher up.

Chris

[roadman65]

It's interesting that no one can agree on what "transit a state" means for routes that end not at the border but merely near it.

Yes, but that is what it is here on the forum.  Look at many of the flame wars on here that got out of hand. 

[hbelkins]

West Virginia has rivers all along the length of its borders with Ohio and Kentucky, and for a brief part of the Virginia border. US 52 enters West Virginia from Kentucky by crossing Tug Fork and exits to Ohio by crossing the Ohio River.

More accurate to say "re-enters." US 52 actually enters the state via a tunnel. But you already knew that.

[froggie]

One not mentioned yet (AFAICT):  US 98 in Alabama.  While the MS/AL border is a straight line, where US 98 crosses it happens to be coincident with the Escatawpa River bridge.  Then US 98 crosses Perdido Bay into Florida.

[JCinSummerfield]

Depending on the definition "transit", I would include I-96, M-72, M-55, M-142, M-46, M-53, M-29, M-25 in Michigan to start off. 

[SeriesE]

I-10 in California, Pacific Ocean at west end, Colorado River at east end.

[webny99]

One not mentioned yet (AFAICT):  US 98 in Alabama.  While the MS/AL border is a straight line, where US 98 crosses it happens to be coincident with the Escatawpa River bridge.  Then US 98 crosses Perdido Bay into Florida.

Along those lines, we had a thread a few months back about water crossings coincident with jurisdictional boundaries. There's probably more unsuspecting examples that could be found using that as a guide.

[SkyPesos]

I'm going to stretch the definition of a water border a bit and mention I-70 in MO. The border crossing in St. Louis is obvious, Stan Musial Bridge over the Mississippi River. On the other side, the MO-KS border is about half a mile east of the Kansas River. The reason why I'm counting this is because it's a single bridge structure crossing both the MO-KS border and the Kansas River, with no exits to the small part of Kansas between those two. When a driver passes the last I-70 exit in Missouri and gets on the bridge, they cross both the state line and the river, and the next exit is on the "mainland" part of Kansas.

Speaking of I-70 in MO, are there examples of highways that have a water crossing on both entry points of a county? I was going to count I-70 and I-64 in St. Louis county, but forgot that St. Louis city is independent from the county, which disqualifies those 2 highways.