Interstates isolated in their state

[Pete from Boston]

The "barely serve their state" thread got me to thinking, I-95 in New Hampshire passes through without connecting to the "Interstate network" in the state, even though there are several other Interstates in the state (all of which are connected). 

Where else does this happen?  Off the top of my head, only I-86 in Pennsylvania and oddities like 684 in Connecticut come to mind, but I'm sure there are others.

(It seems likely that this topic would have been covered by now, btw, but my reasonable search for it was fruitless.)

[OCGuy81]

15 in Arizona

[TheStranger]

For that matter, the only Interstates that run through Nevada (15 and 80) do not connect to each other in that state, but in Utah.

[jdb1234]

I-24 and I-59 connect to each other in Georgia, but don't connect to any other interstates in the state.

[OCGuy81]

Could you count I-90 in northern Idaho in this list?

[2Co5_14]

I-275 in Indiana
I-155 in Tennessee
I-10 in Mississippi
I-40/I-27 in Texas

[NE2]

Didn't we just have this thread?

[vdeane]

I-78 in NY

[dfwmapper]

I-44 in Texas
I-2/I-69C/I-69E in Texas
Temporarily, I-22 in Alabama

[cpzilliacus]

I-81 in West Virginia.

[Pete from Boston]

I-78 in NY

Good one.

[Pete from Boston]

Didn't we just have this thread?

Couldn't find it if so.  There's a thread about short lengths of Interstate in a state–I was asking about parts of any length unconnected to the state's Interstate network. 

[hbelkins]

I-81 in West Virginia.

I'd also include I-70, because it only connects to I-470 while in WV, and 470 is a loop that only connects to its parent.

Up until the designation of I-69, I-24 in Kentucky would have counted.

Also I-95 and I-495 in the District of Columbia. 

[NE2]

Ah, I was misremembering what https://www.aaroads.com/forum/index.php?topic=13983 evolved into once it became clear that 684 is the only one.

[clong]

I-72 in MO
I-64 in IN (at least until I-69 was designated and arguably still so)
I-86 in PA (eastern occurrence at Waverly/South Waverly)

[NE2]

I-64 in IN (at least until I-69 was designated and arguably still so)

I-265.

[SSOWorld]

I-535 in WI.
I-72 in MO.
I-155 in TN

[DandyDan]

I-129 in Nebraska

[empirestate]

I-86 connects to I-90 in PA, so I wouldn't count it. That it re-enters the state elsewhere (and it doesn't even do that, yet) doesn't change things in my view.

[Pete from Boston]

I-86 connects to I-90 in PA, so I wouldn't count it. That it re-enters the state elsewhere (and it doesn't even do that, yet) doesn't change things in my view.

You're right.  I spaced when I mentioned it.  I was thinking of 90 and conflated it with 86.  Bad brain day.

[mgk920]

A few others not yet mentioned:

-I-22 in Alabama (until sometime in 2015)
-I-22 in Mississippi (ditto).
-I-95 in New Hampshire.
-I-99 in Pennsylvania(?)
-I-49 in Texas.
-I-2/69C/69E in Texas (for now).
-I-66 in Washington, DC.

Which would you count for Nevada, I-80/580 or I-15/215/515?



Does I-540 enter Oklahoma?

Also, I was also going to say 'I-535 in Wisconsin', but I was beaten to that punch on that one.

Up until the designation of I-69, I-24 in Kentucky would have counted.

It still does - they're still isolated from the rest of the I-system in KY.



Mike

[SteveG1988]

A few others not yet mentioned:

-I-22 in Alabama (until sometime in 2015)
-I-22 in Mississippi (ditto).
-I-95 in New Hampshire.
-I-99 in Pennsylvania(?)
-I-49 in Texas.
-I-2/69C/69E in Texas (for now).
-I-66 in Washington, DC.

Which would you count for Nevada, I-80/580 or I-15/215/515?



Does I-540 enter Oklahoma?

Also, I was also going to say 'I-535 in Wisconsin', but I was beaten to that punch on that one.

Up until the designation of I-69, I-24 in Kentucky would have counted.

It still does - they're still isolated from the rest of the I-system in KY.



Mike

I-99 is a temporary thing, it uses breezewoods.

I-72 in Hannibal MO

[Zeffy]

-I-99 in Pennsylvania(?)

I thought I-99 connected to I-70 / PATP at it's south end? And wouldn't it technically connect to I-80 once the upgrades are complete?

[SteveG1988]

-I-99 in Pennsylvania(?)

I thought I-99 connected to I-70 / PATP at it's south end? And wouldn't it technically connect to I-80 once the upgrades are complete?

As i said in the post before yours, it is a breezewood situation for now.

[adventurernumber1]

-I-49 in Texas.

Earlier I was going to mention I-49 in Texas in this thread, but actually, it might not be a candidate here due to the fact that there may be a northern Texarkana loop connecting I-49 & I-30 in Texas. Though I-49 would be going through Texas for a darn brief period, it would have a connection to the interstate system in Texas.