US and Interstate routes that cross only once with no interchange

[vdeane]

In that case we could also count I-84 and US 202 at Brewster.

If we're limiting it by state, but don't forget the overlap between the two just a few miles to the east in Danbury.

[NWI_Irish96]

Indiana does not have any that qualify. All the places that miss also have at least one that hits:

US 20 intersects I-90 three times without an interchange, but there is one at their intersection in Gary.

US 20 intersects I-94 once without an interchange, but there is one at their intersection in Porter.

US 31 intersects I-65 once without an interchange, but there are many intersections with interchanges.

[hbelkins]

In that case we could also count I-84 and US 202 at Brewster.

If we're limiting it by state, but don't forget the overlap between the two just a few miles to the east in Danbury.

I was referring to one crossing of one Interstate and one US route without regard to state, but if there are multiple instances of routes crossing without any interchanges across one state or multiple states, even better.

[webny99]

Yes, the third interchange I was referring to is the Northway stub connecting from I-87/I-90 to US 20. I don't see how it's any different the Thruway Exit 58. If it was numbered as a separate route or became part of I-87 that would be one thing, but right now it's functionally just a pair of ramps and signed as such.

It doesn't feel like a just pair of ramps when you drive on it (note that the "be prepared to stop" signs are for people getting off at the Crossgates interchange).  Northbound even has exit numbers, because the through route in the Northway/Fuller Road Alternate, not I-87.  In fact, most people around here don't acknowledge I-87 off the Northway at all; the Thruway is just the Thruway, and the Deegan isn't known.  It's also reference route 910F, while exit 58 has no such designation and is basically the same as every other Thruway trumpet except for being very long.

Personally, I think it has more in common with the Maine Turnpike Approach Road.

I guess we can agree to disagree regarding whether it counts. Having an interchange within an interchange doesn't seem like an immediate disqualifier (see Thruway Exit 17 and I-76/I-80 in Ohio). I had also never heard it called Fuller Road Alternate prior to this thread, and it's not signed as anything despite the internal number, so it seems close enough to an extended interchange to me.

I think it would be great if it did become part of a realigned I-87 at some point, but that seems improbable despite its logical merits.

[tigerwings]

80/90 with US 127 and US 23/I 475 in NW Ohio

[vdeane]

I had also never heard it called Fuller Road Alternate prior to this thread

It's how NYSDOT refers to it internally.  I believe the media has used the name a couple times, but I'm not sure the name has spread that far.

To be honest, I consider it and I-87 north of I-90 to be one contiguous road.  I'm not sure how far the Adirondack Northway designation officially extends, but in my mind, it's everything from Western Avenue (US 20) to the Canadian border.  Thus, exit 1 looks like a junction between the Northway and free 90, and I have to actively remind myself that I-87 has an overlap with I-90 to get to the Thruway (I don't even think of the Thruway and Northway parts of I-87 as being part of the same route, even though they actually are).

[Rothman]

I've seen maps with the segment south of I-87/I-90 to Western Ave called "Adirondack Northway" on maps.  Didn't know Fuller Road Alternate is what it was called.

[OracleUsr]

I-77, US 64, Statesville, NC.  There are several nearby ways to get there, but no direct interchange between the two.

[mgk920]

Indiana does not have any that qualify. All the places that miss also have at least one that hits:

US 20 intersects I-90 three times without an interchange, but there is one at their intersection in Gary.

US 20 intersects I-94 once without an interchange, but there is one at their intersection in Porter.

US 31 intersects I-65 once without an interchange, but there are many intersections with interchanges.

I-80 and US 20 in Indiana?

Mike

[NWI_Irish96]

Indiana does not have any that qualify. All the places that miss also have at least one that hits:

US 20 intersects I-90 three times without an interchange, but there is one at their intersection in Gary.

US 20 intersects I-94 once without an interchange, but there is one at their intersection in Porter.

US 31 intersects I-65 once without an interchange, but there are many intersections with interchanges.

I-80 and US 20 in Indiana?

Mike

I wasn't thinking about I-80 because it's 100% concurrency, but it shares two of the crossings of US 20 that don't intersect but not the one that does.

[vdeane]

I've seen maps with the segment south of I-87/I-90 to Western Ave called "Adirondack Northway" on maps.  Didn't know Fuller Road Alternate is what it was called.

Having done an errand in Guilderland today, it can be argued that it's signed that way.

[dlsterner]

In Maryland, near Hagerstown - I-70 crosses over US 11 without an interchange.

To be fair, I-70 does have an interchange nearby with I-81, which parallels US 11, making an interchange with US 11 mostly unnecessary.

[pderocco]

"No interchange" is a little hard to define. For instance, do I-90 and US-5 have an interchange or not in Springfield MA? They connect through the famous "trumpet quartet", but you could argue that that constitutes three interchanges to get from one to the other, even though there's nothing on those very short connectors, and they don't even have names let alone numbers of their own.

That also highlights that this is more likely to be the case with toll roads, because of the frequent use of a trumpet connector that used to have tollbooths. Indeed, that's the case between I-90 and I-495 in Hopkinton MA, which they are in the process of remedying as we speak.

[WillWeaverRVA]

This used to be true for US 29 and I-495 in Virginia before the HOT express lanes were built. Prior to the express lanes, US 29 crossed over I-495 without an interchange due to the close proximity of the complex I-66 and US 50/Fairview Park interchanges, but US 29 now has a partial express lane-only interchange with a northbound exit and a southbound entrance.

[74/171FAN]

This used to be true for US 29 and I-495 in Virginia before the HOT express lanes were built. Prior to the express lanes, US 29 crossed over I-495 without an interchange due to the close proximity of the complex I-66 and US 50/Fairview Park interchanges, but US 29 now has a partial express lane-only interchange with a northbound exit and a southbound entrance.

I do not think this counts because I-495 already had an interchange with US 29 in MD.

[SEWIGuy]

Ninguna en Wisconsin, tampoco.

I don't believe that US-18 has an interchange with I-43.

[WillWeaverRVA]

This used to be true for US 29 and I-495 in Virginia before the HOT express lanes were built. Prior to the express lanes, US 29 crossed over I-495 without an interchange due to the close proximity of the complex I-66 and US 50/Fairview Park interchanges, but US 29 now has a partial express lane-only interchange with a northbound exit and a southbound entrance.

I do not think this counts because I-495 already had an interchange with US 29 in MD.

I know, but some posters in the thread were referring to instances in a single state.

[cwf1701]

I don't know if this count. I-75 and US-12 in Detroit. there is an interchange with US-12 from NB I-75 via the I-96 interchange

[mgk920]

Ninguna en Wisconsin, tampoco.

I don't believe that US-18 has an interchange with I-43.

 

Mike

[Big John]

Ninguna en Wisconsin, tampoco.

I don't believe that US-18 has an interchange with I-43.

 

Mike

With the removal of a couple ramps on I-43 for the Marquette Interchange reconstruction project.

[SEWIGuy]

Ninguna en Wisconsin, tampoco.

I don't believe that US-18 has an interchange with I-43.

 

Mike

With the removal of a couple ramps on I-43 for the Marquette Interchange reconstruction project.

Yeah it USED to have an interchange, and in all practicality US-18 is easily accessible from I-43, but I don't think US-18 or Wells Street is listed on any BGS on I-43.

[wanderer2575]

I don't know if this count. I-75 and US-12 in Detroit. there is an interchange with US-12 from NB I-75 via the I-96 interchange

It counts.  It has an I-96 exit number, so it's not merely a split of the ramp from I-75.

[vegas1962]

I-75 passes over US-30 near Beaverdam, OH but does not have a direct interchange with it. US-30 is accessed from I-75 via the exit to OH-696 and the exit sign references "OH-696 TO US-30."