Interstates that end at state lines

[myosh_tino]

If (and this is a big IF), I-580 in Nevada were extended north of I-80 in Reno, it would have to end at the Nevada/California border because...

1. I-580 already exists in California
2. California does not allow route number duplication
3. The road downgrades to a 4-lane expressway with at-grade intersections north of the stateline.

[CNGL-Leudimin]

And two 3dis of the same number cannot exist in the same state.

Anyway, Google already ended I-580 at the CA border some time ago.

[jp the roadgeek]

Does it count if the state line is also an international border?  If so, then I-95, I-91, I-87, and I-81, and that's just getting started...

Or the northern ends of I-5, I-15, I-29, I-75, I-69/94, I-190, I-81, I-87, I-89, I-91, and I-95; and the southern ends of I-5 and I-110.

Yep.

You forgot the southern ends of I-19, I-35, and the future spurs of I-69

[NE2]

You forgot the southern ends of I-19, I-35, and the future spurs of I-69

Nope.

[Alps]

You forgot the southern ends of I-19, I-35, and the future spurs of I-69

Nope.

I-69W looks like it might hit the border, from the other thread.

[hotdogPi]

I-80, according to Rand McNally. But it's wrong.

[Duke87]

You forgot the southern ends of I-19, I-35, and the future spurs of I-69

Nope.

To be a tad more articulate: I-19 and I-35 both end near, but not at the border: in both cases it's a brief trip on city streets from the end of the freeway to customs. The other examples I gave have the interstate feeding directly into customs with no local roads in between.

I-96 also fails to qualify for similar reason: it ends at I-75, it does not continue onto the Ambassador Bridge.

[bugo]

STATE lines, not international boundaries.

[froggie]

US 98 did end at the MS-LA state line for a time, at least according to signage.

According to signage, but per MDOT it ends at US 84 Bude...though wouldn't be the first time Mississippi signage didn't line up with what officially exists (or doesn't).  Also never got a good answer from MDOT as to when US 98 acquired its Bude terminus.

[NE2]

International boundaries are state lines.

PS: I-110 MS ends at a state line.

[froggie]

PS: I-110 MS ends at a state line.

Since you're being technical, no it doesn't since it does veer back onto the beach to US 90.  And officially, it ends where the centerline first meets US 90.

[oscar]

You forgot the southern ends of I-19, I-35, and the future spurs of I-69

Nope.

To be a tad more articulate: I-19 and I-35 both end near, but not at the border: in both cases it's a brief trip on city streets from the end of the freeway to customs. The other examples I gave have the interstate feeding directly into customs with no local roads in between.

Similar for the new I-69E in Texas (ends a few at-grade intersections north of the border).  I-69C doesn't come close, ending at I-2. 

Oh, and you all thought I wouldn't bring up Interstate A-1 in Alaska (ends at the border with Yukon Territory)?

[Alps]

PS: I-110 MS ends at a state line.

Since you're being technical, no it doesn't since it does veer back onto the beach to US 90.  And officially, it ends where the centerline first meets US 90.

I know there are other water interchanges, but I have never seen ramps over the ocean before.

[vdeane]

I-69E might yet reach the border some day.  Of the at-grades, we have a right in/no out that could be restriped as a ramp (or cut off), a signalized intersection that could easily become an interchange, a no in/right out that can become a ramp or cut off, a RIRO that can be cut off, and the customs complex which we can ignore.

[mrsman]

Before the completion of the Mark Twain Bridge, I-72 was wholly within Illinois and it ended fairly close to the state border.




Also, while formally I-80 ends in Teaneck, NJ at the I-95 junction, there is enough "informal" indication, including BGSes that seem to indicate that I-80 westbound begins at the George Washington Bridge.

[hotdogPi]

there is enough "informal" indication, including BGSes that seem to indicate that I-80 westbound begins at the George Washington Bridge.

That seems to be what Rand McNally says.

[Alps]

Before the completion of the Mark Twain Bridge, I-72 was wholly within Illinois and it ended fairly close to the state border.




Also, while formally I-80 ends in Teaneck, NJ at the I-95 junction, there is enough "informal" indication, including BGSes that seem to indicate that I-80 westbound begins at the George Washington Bridge.

The NJ Turnpike Authority maintains the roadway west of Fletcher Ave./US 9W. They know full well that it's I-95 only. Anything east of there is Port Authority.

[Molandfreak]

I-19 technically doesn't end at the first at-grade, so why wasn't it grandfathered all the way to the border?

[WashuOtaku]

Interstate 74 in North Carolina stops at the Virginia state line, in concurrency with Interstate 77.

[OCGuy81]

Two in the Midwest come to mind.

1) Does Interstate 72 end at the Missouri state line before crossing into Hannibal, MO?

2) If I-41 gets signed in Wisconsin, I believe it will end at the WI-IL state line.

[hbelkins]

Two in the Midwest come to mind.

1) Does Interstate 72 end at the Missouri state line before crossing into Hannibal, MO?

No.



It ends at the US 61 interchange.

[OCGuy81]

Thank you, hbelkins.

I wasn't sure.  Google maps showed it crossing, but that can be unreliable at times. I appreciate you clarifying.

[Big John]

Two in the Midwest come to mind.

2) If I-41 gets signed in Wisconsin, I believe it will end at the WI-IL state line.

It will stop just south of the state line where US 41 splits from I-94.

[agentsteel53]

I never realized how little of 72 there was in MO.  I had thought it ended about 10 miles in, at the first at-grade crossing, but it looks like a bunch of that road is just US-36 freeway.

[hbelkins]

There's a sign on westbound I-72/US 36, just past that US 61 interchange that denotes the end of the Interstate. I haven't been west on I-72 but I shot this photo in 2010 as I passed under US 36 on US 61 southbound.