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.
I-684 in Connecticut.
I 15 in Arizona?
Quote from: allniter89 on November 16, 2014, 01:52:05 AM
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.
Quote from: allniter89 on November 16, 2014, 01:52:05 AM
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.
I'm guessing Interstate 76 in Nebraska doesn't count... :awesomeface:
Quote from: geocachingpirate on November 16, 2014, 02:05:30 PM
I'm guessing Interstate 76 in Nebraska doesn't count... :awesomeface:
It has an exit...
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.
Quote from: roadman65 on November 16, 2014, 03:08:16 PM
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.
And you're willing to count cases that pass through only water (I don't).
Quote from: NE2 on November 16, 2014, 03:17:06 PM
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.
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.
Quote from: roadman65 on November 16, 2014, 03:27:29 PM
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.
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.
Quote from: 1995hoo on November 16, 2014, 04:12:14 PM
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.
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...
Quote from: empirestate on November 16, 2014, 04:52:48 PM
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.
Quote from: roadman65 on November 16, 2014, 03:27:29 PM
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.
How about an 2dI that is totally within a single state.
Quote from: NE2 on November 16, 2014, 05:13:22 PM
Quote from: empirestate on November 16, 2014, 04:52:48 PM
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.
Quote from: 02 Park Ave on November 16, 2014, 05:33:43 PM
How about an 2dI that is totally within a single state.
That's been done. I-97 comes to mind.
4, 12, 66, 86w, 87, 88e, 99
Probably not a complete list, but yeah, it's been done.
Quote from: 1995hoo on November 16, 2014, 03:23:27 PM
Quote from: NE2 on November 16, 2014, 03:17:06 PM
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.
Quote from: empirestate on November 16, 2014, 04:52:48 PM
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
How about I-495 at the PA/DE line?
Quote from: Kacie Jane on November 16, 2014, 06:05:12 PM
4, 12, 66, 86w, 87, 88e, 99
Probably not a complete list, but yeah, it's been done.
99 is signed now in NY. Pretty sure someone posted pictures of this within the past week, actually.
iPhone
Quote from: hbelkins on November 16, 2014, 10:41:53 PM
How about I-495 at the PA/DE line?
While I-495 enters PA, it doesn't go
through it; it ends just north of the state line.
Quote from: Kacie Jane on November 16, 2014, 06:05:12 PM
4, 12, 66, 86w, 87, 88e, 99
Probably not a complete list, but yeah, it's been done.
2, 4, 12, 16, 17, 19, 27, 37, 43, 45, 73, 86 west, 87, both 88s, 96, and 97 (not counting Hawaii's for obvious reasons, nor the unsigned ones in Alaska or Puerto Rico). I suppose you could count I-66 as not entering two states due to the District of Columbia not being a state, but the comment to which you were responding asked for 2di routes "totally within a single state," so I-66 would not satisfy that criterion.
Don't know how I forgot the Arizona ones (the rest I'll forgive myself for, but 17/19 should have been obvious)... 66 was an unexcusable cockup on my part, 99 was just a bit of more innocent forgetfulness. Ah well, I'll post a little slower next time.
Quote from: Kacie Jane on November 17, 2014, 10:03:54 AM
Don't know how I forgot the Arizona ones (the rest I'll forgive myself for, but 17/19 should have been obvious)... 66 was an unexcusable cockup on my part, 99 was just a bit of more innocent forgetfulness. Ah well, I'll post a little slower next time.
Heh. DC's segment of I-66 is utterly forgettable other than the ancient sign bridge located near the Saudi Arabian embassy!
Quote from: 1995hoo on November 17, 2014, 09:58:55 AM
Quote from: Kacie Jane on November 16, 2014, 06:05:12 PM
4, 12, 66, 86w, 87, 88e, 99
Probably not a complete list, but yeah, it's been done.
2, 4, 12, 16, 17, 19, 27, 37, 43, 45, 73, 86 west, 87, both 88s, 96, and 97 (not counting Hawaii's for obvious reasons, nor the unsigned ones in Alaska or Puerto Rico). I suppose you could count I-66 as not entering two states due to the District of Columbia not being a state, but the comment to which you were responding asked for 2di routes "totally within a single state," so I-66 would not satisfy that criterion.
Yes you cannot say that I-66 is not intrastate even though it is only in the Commonwealth of Virginia as far as states go.
I-295 is actually an interesting piece as not only does this happen to in MD as far as states go while its other is DC, but one that could arguably be considered one without a proper mainline exit in MD back before it was extended to MD 210 a couple decades ago due to its one interchange was the actual terminus.
That is a tricky one!
For me, I-275 in IN comes to mind, probably because most people tend to forget that it exists there, in addition to OH and KY. But then I remember that it starts a concurrency with I-74 from Indianapolis and continues until they split off on the OH side, where the 2di takes its course into Cincinnati.
And speaking of Interstates missing state borders, the lower end of I-485 runs very close to SC.
Quote from: Henry on November 17, 2014, 11:33:09 AM
That is a tricky one!
For me, I-275 in IN comes to mind, probably because most people tend to forget that it exists there, in addition to OH and KY. But then I remember that it starts a concurrency with I-74 from Indianapolis and continues until they split off on the OH side, where the 2di takes its course into Cincinnati.
And speaking of Interstates missing state borders, the lower end of I-485 runs very close to SC.
However, I-275 does have one interchange in Indiana.
https://www.google.com/maps?ll=39.125399,-84.82707&spn=0.039684,0.084543&t=h&z=14
Does it count if it is a freeway merging in for an exit? for example prior to 1999 there was only one exit along the PA turnpike Extension of the NJ TUrnpike which was at the time I-276. It was a eastbound sliproad exit, would that have counted for this?
Quote from: SteveG1988 on November 17, 2014, 11:45:23 AM
Does it count if it is a freeway merging in for an exit? for example prior to 1999 there was only one exit along the PA turnpike Extension of the NJ TUrnpike which was at the time I-276. It was a eastbound sliproad exit, would that have counted for this?
Since the OP's only asking regarding Interstates; the above would not count. The NJ Turnpike portion of the PA Turnpike Connector pre-1999 is
not part of I-276.
Quote from: signalman on November 16, 2014, 04:08:31 PM
The Indiana Toll Road gets closer to Michigan at one point. Approximately 1000 feet, if memory serves.
I-44 comes within 1000 feet of Kansas without entering it. And I-29 gets within 1000 feet of Nebraska without entering it (repeatedly, about 500 feet at the closest). But I-84/NJ still wins easily.
I-495 comes to within 200 feet or so of the NH line near its (non-exit) junction with MA 108?
Quote from: jp the roadgeek on November 17, 2014, 11:08:17 PM
I-495 comes to within 200 feet or so of the NH line near its (non-exit) junction with MA 108?
Close but no cigar.
I 865 in Indianapolis has no exits
Quote from: robbones on November 18, 2014, 09:34:21 AM
I 865 in Indianapolis has no exits
Even in the literal sense (and the question is obviously about interchanges, not exits per se) it has one for I-465 south.
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.interstate-guide.com%2Fimages865%2Fi-865_in_et_03.jpg&hash=a5a30c3def16ea4f1a27f9698cc20e3b7ad88561)