routes that intersect but do not cross

[agentsteel53]

this started out being a harebrained joke thread but then I realized that there is the possibility of two roads that come together almost to where they touch, and then separate again.  then, at that point, there is an interchange where traffic from one can go to another.

anything out there like this? 

[TheStranger]

this started out being a harebrained joke thread but then I realized that there is the possibility of two roads that come together almost to where they touch, and then separate again.  then, at that point, there is an interchange where traffic from one can go to another.

anything out there like this? 

I-580 and Route 238 in Hayward?  Route 247 and Route 18 in Lucerne Valley looks like the two roads used to intersect, then a short bypass for Route 18 was built to go around the intersection.

[Takumi]

I-95 and US 301 do this twice (I think, definitely once) near Emporia. I think the old US 421 exit (now just "Colfax") from I-40 Business is like this too.

[1995hoo]

Kings Highway and US-1 (Richmond Highway) in Fairfax County, Virginia. They're arterial streets and so it's a rather convoluted intersection where they pass each other, but I believe it meets the criterion of roads intersecting and not crossing. See map here (they pass each other where it says "Walmart"). I suppose technically the two segments of Kings Highway (North Kings Highway and South Kings Highway) could be considered different roads because they have different route numbers, but I've never known of anyone using the route number to refer to either segment.

Also US-1 and I-95 just north of Woodbridge, Virginia. Map here. It's a partial interchange in that if you exit I-95 you cannot re-enter in the same direction at that interchange.

[luokou]

OR-8 and OR-10 in Beaverton.  Although there are a number of streets that will connect the two throughout Downtown Beaverton, the closest they come to intersecting is at Cedar Hills Blvd.

[jdb1234]

I-65 and US 31 in north Birmingham.  A full interchange, but US 31 does not cross I-65 here.

[mightyace]

^^^

I'm not sure if that meets the OP's criteria.  Even though they don't cross there, US 31 and I-65 cross many times elsewhere.

Though if it does, here an interchange between I-81 and PA 309 northeast of Delano, PA.  But, I-81 and PA 309 multiplex now around Wilkes-Barre where they used to just cross.

http://maps.google.com/maps?hl=en&ll=40.881333,-76.008129&spn=0.018397,0.045447&t=w&z=15

[kphoger]

I've played around with designs some in MSPaint, but it's a rarity in real life.

[hbelkins]

The interchange of US 460 and its business route just north of Christiansburg, VA and south of Blacksburg, might qualify.

Also, US 45 and IL 1 "bump" at Norris City.

[ftballfan]

M1 and A41 north of London at J5

[kphoger]

The interchange of US 460 and its business route just north of Christiansburg, VA and south of Blacksburg, might qualify.

Also, US 45 and IL 1 "bump" at Norris City.

I used to drive through that intersection almost every day for work.  Don't think that should qualify, though I can't exactly articulate the reason.

[english si]

M1 and A41 north of London at J5

Ah, but they cross south of that. There's quite a few junctions similar to that in the UK (though no others that are grade-separated on both routes).

Nearby is the A1081-A5183 (former A5-A6) cannoning off each other in the middle of St Albans.

[Kacie Jane]

I can think of one -- possibly two -- examples in NJ that should qualify, although the pairs do cross elsewhere.

First, the Palisades Parkway and US 9W.  They cross at Exit 4 (and meet again in New York), but Exit 2 and Exit 3 are both also for 9W where the two run parallel.

Then this is sort of an odd duck.  The southernmost crossing of the Garden State Parkway and US 9 is (temporarily?) at Exit 25.  A small handful of interchanges south of there are signed "TO US 9" -- but these obviously don't count, they're just regular cross-street interchanges and you head a couple of blocks west to reach US 9.  But what may count is this strange "on-ramp only" that looks like it must have originally been a temporary end of the Parkway (note the abandoned parallel ramp) -- or maybe just another at-grade "interchange" to go with the three south of there.

[vdeane]

NY 3 and NY 374 do this west of Plattsburg.

[1995hoo]

M1 and A41 north of London at J5

Ah, but they cross south of that. There's quite a few junctions similar to that in the UK (though no others that are grade-separated on both routes).

Nearby is the A1081-A5183 (former A5-A6) cannoning off each other in the middle of St Albans.

In fairness, the OP didn't ask for roads that intersect but NEVER cross. I know I presumed he meant any single instance of that happening (otherwise I-95 and US-1 would obviously be disqualified).

[bulldog1979]

M-54 and I-475 in Flint have an interchange, but they run parallel to each other.

M-6 has a ramp eastbound to connect to the parallel 68th Street, and 68th has connections through the interchange to both directions of M-6.

Depending on how you count it, the unsigned I-296 has ramps to and from M-37 (Alpine Avenue), but its northern terminus is short of that overpass along I-96.

I suppose that you would also count every instance of something like the M-38 and M-64 common termini; a single roadway changes designations at the intersection with US 45, so the two "intersect" with each other, but neither crosses over, under, or through the other.

[TheStranger]

I-95 and US 1 in West Peabody, MA (I-95 Exit 46) -

https://maps.google.com/maps?q=W+Peabody,+MA&hl=en&sll=42.539295,-71.000776&sspn=0.043447,0.104628&hnear=West+Peabody,+Peabody,+Essex,+Massachusetts&t=m&z=15

[deathtopumpkins]

I-95 and US 1 in West Peabody, MA (I-95 Exit 46) -

https://maps.google.com/maps?q=W+Peabody,+MA&hl=en&sll=42.539295,-71.000776&sspn=0.043447,0.104628&hnear=West+Peabody,+Peabody,+Essex,+Massachusetts&t=m&z=15

I personally don't think I would count that one because those ramps are just additional ramps from the interchange to the south, where they do cross.
Northbound traffic on 1 has signage treating it as one interchange ( 95 north exit 1 mile  |  95 south -> ), but both movements are also possible at the southern interchange (just far less direct) so I guess it could go either way.



I-95 and US 1 in Kittery, ME

I-295 and US 1 in Brunswick, ME

You could also count some of the MassPike interchanges, because for several in central and western Mass the road it interchanges with runs parallel for several miles before crossing, so while the roads do cross it is not in the interchange complex. Along these same lines, you could count US 5 and I-91 at their combined MassPike interchange (exit 4). US 5 has its own interchange with 91 a few miles to the south, but the Pike interchange is a triple-trumpet allowing traffic from 5 to get to 91 and vice-versa without going through the Pike toll barrier.

[PurdueBill]

I personally don't think I would count that one because those ramps are just additional ramps from the interchange to the south, where they do cross.
Northbound traffic on 1 has signage treating it as one interchange ( 95 north exit 1 mile  |  95 south -> ), but both movements are also possible at the southern interchange (just far less direct) so I guess it could go either way.

The interchange now known as Exit 46 was there for a good decade and a half before what is now known as Exits 29/45 (on 128 and 95) were built, so Exit 46's seniority ought to count for something.    Back before the connection was completed, the exit from US 1 NB to I-95 NB at the northern interchange was I-95! 

(Whether the mile or so of US 1 in Peabody that carried I-95 traffic was technically part of I-95 can be debated; I don't know if it was considered officially part of a temporary routing or if 95 was simply discontinuous.  Signage carried I-95 along that stretch of US 1--driveways, side streets, and all.)

[pianocello]

I-74 and US-150 do this once in Peoria and debatably once more in Champaign. However, they also meet each other at an additional (ironically) 7 interchanges.

[vtk]

I-80 and I-76 in NE Ohio, anyone? There's even some wrong-way multiplex action in the double trumpet interchange.

Or, lesser known, US 33 and OH 29 near St. Marys. In that one, the two routes are intertwined but never actually share pavement.

I'm trying to think of an example with a conventional interchange, but coming up empty. I suspect there may be one or two in Clevelandland somewhere.

[PHLBOS]

I personally don't think I would count that one because those ramps are just additional ramps from the interchange to the south, where they do cross.
Northbound traffic on 1 has signage treating it as one interchange ( 95 north exit 1 mile  |  95 south -> ), but both movements are also possible at the southern interchange (just far less direct) so I guess it could go either way.

The interchange now known as Exit 46 was there for a good decade and a half before what is now known as Exits 29/45 (on 128 and 95) were built, so Exit 46's seniority ought to count for something.    Back before the connection was completed, the exit from US 1 NB to I-95 NB at the northern interchange was I-95!  

(Whether the mile or so of US 1 in Peabody that carried I-95 traffic was technically part of I-95 can be debated; I don't know if it was considered officially part of a temporary routing or if 95 was simply discontinuous.  Signage carried I-95 along that stretch of US 1--driveways, side streets, and all.)

I know you (PurdueBill) know this and we spoke about this on one of the "traffic signs" thread, but for those that don't already know: once upon a time, that interchange was originally propossed to have the opposite movements of what's there now (I-95 North to US 1 North/US 1 South to I-95 South).  

The current connection, in its original form (pre-1988) was constructed as a means of utilizing the then-newly built stretch of I-95 while the southern extension to MA 128 and then-beyond was still being prepped and eventually constructed; the connecting ramps were originally supposed to be only temporary.  However, when the decision was made to cancel I-95 inside 128 (to US 1/MA 60 at Cutler Circle in Revere) was made in 1974; the ramps remained and eventually became permanent even after 95 was finally extended to 128.  Note: the ramp from US 1 North to I-95 North was altered somewhat during the 95 extension project of the mid-80s.

With regards to that short stretch of US 1 being considered part of I-95 pre-1988; while the DPW considered it only a temporary measure, the signage along with the structure-mounted mileage markers along I-95 and MA 128 (some of the latter remain to this day) certainly considered it (US 1) as a part of I-95.

[kurumi]

In Ellington, CT, routes 140 and 286 almost touch: http://goo.gl/maps/x7cK

A short (town-maintained) road, less than 100 feet long, connects them.

[HazMatt]

I-40 and US-64 just east of I-77 do this at exit 153, although it's only a partial interchange.  http://goo.gl/maps/Koh6

[ATLRedSoxFan]

I-40/75, (Exit 380) in Knoxville. At least it used to be with US-11/70. The two roads run close to each other, but don't intersect. It's a trumpet interchange.