Is there an Interstate that goes through a state with no exit?

[DevalDragon]

Is there an example of an Interstate that goes thru a state without an exit in that state? I can't think of any off the top of my head.

My first thought was I-24 between Nashville and Chattanooga TN that dips in to GA, but there are 2 exits in GA. And this question came from a non road geek friend during a road trip to Cincinnati.

[NE2]

I-684 in Connecticut.

[allniter89]

I 15 in Arizona?

[NE2]

I 15 in Arizona?

Nope. Nor I-86 in PA. Nor I-275 in IN. I-95/495 in DC is the only other one AFAIK, and DC's not exactly a state, and it's only a water boundary.

[adventurernumber1]

I 15 in Arizona?

That's the first possible answer that came to my mind, but after looking at Google Maps, I-15 surprisingly does have three exits within the borders of Arizona. I-24 in Georgia is also a close call, but it has its interchange with I-59 & also with GA SR 299.

[geocachingpirate]

I'm guessing Interstate 76 in Nebraska doesn't count...   

[NE2]

I'm guessing Interstate 76 in Nebraska doesn't count...   

It has an exit...

[roadman65]

 I do not think there is other than I-684 in CT.  Even the most shortest of distances that one particular interstate spends in one state, has connections to its road network. Even AZ with its NW corner being orphaned from the rest of the state due to the Grand Canyon, it still ties into the interstate system.

[1995hoo]

I do not think there is other than I-684 in CT.  Even the most shortest of distances that one particular interstate spends in one state, has connections to its road network. Even AZ with its NW corner being orphaned from the rest of the state due to the Grand Canyon, it still ties into the interstate system.

Unless, as NE2 noted, you're willing to consider DC as the equivalent of a state for this purpose, in which case you can count I-95 and I-495.

[NE2]

And you're willing to count cases that pass through only water (I don't).

[1995hoo]

And you're willing to count cases that pass through only water (I don't).

To be truly hypertechnical to the point of absurdity (hey, absurdity seems fitting since I have the Redskins game on!!!), that segment is sometimes partially above land and sometimes not, depending on the river level. Not that such should necessarily change your point, though I suppose in theory one could envision an over-water interchange at the corner of a state were boundaries different.

[SSOWorld]

I'm guessing Interstate 76 in Nebraska doesn't count...   

It has an exit...

east end.

[roadman65]

Now come up with a thread about what interstate comes within a tenth of a mile of another state and you may have one or make it a full mile and you may have more than one.  In fact I believe that 1 came up with that one already, though using 1000 feet or something to use as a measurement.

In that case I-84 missing New Jersey by a couple of thousand of feet would win that one  I suggested first hands down.  The others were covered mostly in the already made thread as it had covered not only roads from the Eisenhower system, but all designations.

[signalman]

Now come up with a thread about what interstate comes within a tenth of a mile of another state and you may have one or make it a full mile and you may have more than one.  In fact I believe that 1 came up with that one already, though using 1000 feet or something to use as a measurement.

In that case I-84 missing New Jersey by a couple of thousand of feet would win that one  I suggested first hands down.  The others were covered mostly in the already made thread as it had covered not only roads from the Eisenhower system, but all designations.

The Indiana Toll Road gets closer to Michigan at one point.  Approximately 1000 feet, if memory serves.

[1995hoo]

How close does I-68 get to Pennsylvania? I'm using my phone to type this and can't seem to make either of the mapping apps I have measure that for me.

[signalman]

How close does I-68 get to Pennsylvania? I'm using my phone to type this and can't seem to make either of the mapping apps I have measure that for me.

I forgot about I-68.  It tooks to be about 700 feet at it's closest point, according to Google Maps.

[empirestate]

Or how about an Interstate that has an exit in a state it doesn't enter? I-86/Future 86 would count at Wilawana, if it weren't for the fact that the Interstate enters PA in two other places...

[NE2]

Or how about an Interstate that has an exit in a state it doesn't enter? I-86/Future 86 would count at Wilawana, if it weren't for the fact that the Interstate enters PA in two other places...

I assume you mean where a ramp crosses a state line but the mainline doesn't. It's still a bit ill-defined - would I-95 at the Betsy Ross Bridge count? PennDOT doesn't give any number to the bridge approach, since it's Derpa-maintained. I'd call it a freeway of its own, but others might call it a ramp to the state line.

I-49/Texas gets in on a technicality.

Given how few Interstates parallel but don't enter states, that's probably all.

[hotdogPi]

In that case I-84 missing New Jersey by a couple of thousand of feet would win that one  I suggested first hands down.  The others were covered mostly in the already made thread as it had covered not only roads from the Eisenhower system, but all designations.

Thirty feet.

[02 Park Ave]

How about an 2dI that is totally within a single state.

[empirestate]

Or how about an Interstate that has an exit in a state it doesn't enter? I-86/Future 86 would count at Wilawana, if it weren't for the fact that the Interstate enters PA in two other places...

I assume you mean where a ramp crosses a state line but the mainline doesn't.

In that instance, yes. But I'll take any other scenario that we think fits the bill.

[kj3400]

How about an 2dI that is totally within a single state.

That's been done. I-97 comes to mind.

[Kacie Jane]

4, 12, 66, 86w, 87, 88e, 99

Probably not a complete list, but yeah, it's been done.

[cpzilliacus]

And you're willing to count cases that pass through only water (I don't).

To be truly hypertechnical to the point of absurdity (hey, absurdity seems fitting since I have the Redskins game on!!!), that segment is sometimes partially above land and sometimes not, depending on the river level. Not that such should necessarily change your point, though I suppose in theory one could envision an over-water interchange at the corner of a state were boundaries different.

Up to the "low water mark" on the Virginia shore, the land is D.C. 

But (thank goodness), the Maryland State Police, and not the District of Columbia's Metropolitan Police Department now has primary police power on the bridge up to the border with Virginia.

The Maryland State Highway Administration has maintenance responsibility up the end of the structure on the Virginia side of the bridge.

[Mapmikey]

Or how about an Interstate that has an exit in a state it doesn't enter? I-86/Future 86 would count at Wilawana, if it weren't for the fact that the Interstate enters PA in two other places...

Not an interstate but US 58 does this with US 29/29 Bus in Danville, VA.  Three of the ramps dip into North Carolina.  An additional ramp, from 58 EB to 29 Bus NB enters NC then back into VA by the time it completes its clover.

Mapmikey