Interstates ending as freeways

[NE2]

I know I-4 is a freeway at both ends. Anyone know others?

[GaryV]

Virtually every Interstate ends as a freeway.  A notable exception is I-180 in WY, since it's not a freeway at all.

[TheHighwayMan3561]

I-35 is a notable one for ending as a non-freeway at both termini.

[GaryV]

I-35 is a notable one for ending as a non-freeway at both termini.

Does the Interstate end where the freeway ends?  Or does it continue on for a few yards?

There are some other Interstates that end on or near bridges where the bridge itself is not a freeway, but it is part of the system.

[CapeCodder]

I-90 ends as a freeway

[KEK Inc.]

I-78 in Jersey City / New York.

[gr8daynegb]

I-35 is a notable one for ending as a non-freeway at both termini.

Think more interesting would be interstates that terminate not as a freeway(like I-43 south in Beloit....or soon to be formerly on this list depending how construction is going)

[SkyPesos]

Virtually every Interstate ends as a freeway.  A notable exception is I-180 in WY, since it's not a freeway at all.

It's a post by NE2...

[webny99]

Whoa, people took this seriously?

If you exclude all termini that aren't at a full freeway junction it could be mildly interesting, but still a lot more that do than don't.

[Flint1979]

All of them.

[Flint1979]

I'm pretty sure that an Interstate highway ends where the freeway ends in almost every case. The stupid I-180 and I-587 and things like that are exceptions but I-180 in Wyoming isn't even an Interstate to begin with.

[bwana39]

I think the epitome of this is US-75 completing I-45

[Big John]

All of them.

I-75 in Sault Ste. Marie ends as a 2-lane bridge on the Canadian border.

[Techknow]

I-280 North in San Francisco does NOT end as a freeway, who knew? Instead it becomes King Street just south of AT&T Park and The Embarcadero, which are both 4-lane divided surface streets, or Sixth street which is 4-lane but undivided.

I-70 East ends at a Park and Ride or at a freeway depending on who you ask!

[CtrlAltDel]

I-19 in Nogales AZ continues a bit past West Street to end at Crawford Street, about three blocks away.

[Ned Weasel]

I'm pretty sure that an Interstate highway ends where the freeway ends in almost every case.

I'm glad you said "almost."  How about we make a list of Interstates that end before the freeway ends?  In other words, Interstates that continue as non-Interstate freeways.

I-39, northern terminus
I-45, northern terminus (or I-345, if you prefer)
I-49, northern terminus
I-64, western terminus
I-72, western terminus
I-76 (East), eastern terminus
I-135, northern terminus
I-210 (California), eastern terminus (why?)
I-235 (Kansas), northern terminus
I-287, southern terminus

Granted, there is quite a bit of variation in how long these continue as freeways before becoming expressways or terminating entirely.  In some cases, it makes sense to end the Interstate designation at another Interstate, when the freeway only continues for a few more miles before petering out as an expressway or a surface road.  In other cases, it seems more arbitrary.

[Hobart]

I'm pretty sure that an Interstate highway ends where the freeway ends in almost every case.

I'm glad you said "almost."  How about we make a list of Interstates that end before the freeway ends?  In other words, Interstates that continue as non-Interstate freeways.

I-39, northern terminus
I-45, northern terminus (or I-345, if you prefer)
I-49, northern terminus
I-64, western terminus
I-72, western terminus
I-76 (East), eastern terminus
I-135, northern terminus
I-210 (California), eastern terminus (why?)
I-235 (Kansas), northern terminus
I-287, southern terminus

Granted, there is quite a bit of variation in how long these continue as freeways before becoming expressways or terminating entirely.  In some cases, it makes sense to end the Interstate designation at another Interstate, when the freeway only continues for a few more miles before petering out as an expressway or a surface road.  In other cases, it seems more arbitrary.

Don't forget about I-794, which downgrades to a Wisconsin state road, remains a substandard freeway for one exit, has a light at the next, has two more exits as a substandard freeway, and ends at a signal by the airport.

Or I-255 in Illinois, which mysteriously downgrades to an Illinois state road without changing numbers or standards after crossing I-55 at its northern terminus.

[Ned Weasel]

Or I-255 in Illinois, which mysteriously downgrades to an Illinois state road without changing numbers or standards after crossing I-55 at its northern terminus.

That's a good example that I did indeed forget about.  But I also got kind of tired and decided to cap my list at 10 before making it an exhaustive search.

[ilpt4u]

I'm pretty sure that an Interstate highway ends where the freeway ends in almost every case.

I'm glad you said "almost."  How about we make a list of Interstates that end before the freeway ends?  In other words, Interstates that continue as non-Interstate freeways.

I-39, northern terminus
I-45, northern terminus (or I-345, if you prefer)
I-49, northern terminus
I-64, western terminus
I-72, western terminus
I-76 (East), eastern terminus
I-135, northern terminus
I-210 (California), eastern terminus (why?)
I-235 (Kansas), northern terminus
I-287, southern terminus

Granted, there is quite a bit of variation in how long these continue as freeways before becoming expressways or terminating entirely.  In some cases, it makes sense to end the Interstate designation at another Interstate, when the freeway only continues for a few more miles before petering out as an expressway or a surface road.  In other cases, it seems more arbitrary.

Don't forget about I-794, which downgrades to a Wisconsin state road, remains a substandard freeway for one exit, has a light at the next, has two more exits as a substandard freeway, and ends at a signal by the airport.

Or I-255 in Illinois, which mysteriously downgrades to an Illinois state road without changing numbers or standards after crossing I-55 at its northern terminus.

I-474 continues as the IL 6 freeway north of I-74 in Peoria, IL

[ztonyg]

I'm pretty sure that an Interstate highway ends where the freeway ends in almost every case.

I'm glad you said "almost."  How about we make a list of Interstates that end before the freeway ends?  In other words, Interstates that continue as non-Interstate freeways.

I-39, northern terminus
I-45, northern terminus (or I-345, if you prefer)
I-49, northern terminus
I-64, western terminus
I-72, western terminus
I-76 (East), eastern terminus
I-135, northern terminus
I-210 (California), eastern terminus (why?)
I-235 (Kansas), northern terminus
I-287, southern terminus

Granted, there is quite a bit of variation in how long these continue as freeways before becoming expressways or terminating entirely.  In some cases, it makes sense to end the Interstate designation at another Interstate, when the freeway only continues for a few more miles before petering out as an expressway or a surface road.  In other cases, it seems more arbitrary.

I'd also add the following:
I-15 (California), southern terminus
I-22 (Mississippi), western terminus
I-37 (Texas), northern terminus
I-44 (Texas), southern terminus
I-110 (California), northern terminus
I-255 (Illinois), northern terminus
I-269 (Tennessee), northern terminus
I-470 (Missouri), eastern terminus
I-470 (Kansas), eastern terminus (if we consider the K-4 super 2 to be the logical I-470 extension and the turnpike connection to I-70 to be ramps)
I-480 (Ohio), western terminus
I-480 (Nebraska), western terminus
I-880 (California), southern terminus

[Ned Weasel]

I-470 (Kansas), eastern terminus (if we consider the K-4 super 2 to be the logical I-470 extension and the turnpike connection to I-70 to be ramps)

I wouldn't include this one, personally.  The I-470 mainline continues as the Kansas Turnpike, which becomes part of I-70 at that point.

[bing101]

I-80 west end ends at US-101 Bayshore to Central in San FranciscoI-680 ends as a freeway on both ends.

[DJ Particle]

US-61 is an expressway north of I-70, not a freeway.

But I guess *technically* the freeway does extend about 10 blocks or so north, as there are 2 interchanges close together before the first surface intersection....  🤔

[Ned Weasel]

US-61 is an expressway north of I-70, not a freeway.

But I guess *technically* the freeway does extend about 10 blocks or so north, as there are 2 interchanges close together before the first surface intersection....  🤔

The question is: where do you draw the line to define this new category we've come up with?

[hotdogPi]

US-61 is an expressway north of I-70, not a freeway.

But I guess *technically* the freeway does extend about 10 blocks or so north, as there are 2 interchanges close together before the first surface intersection....  🤔

The question is: where do you draw the line to define this new category we've come up with?

You don't draw the line. FritzOwl does.