Numbered routes you cannot legally follow

[NoGoodNamesAvailable]

While messing around on google maps, I noticed that since there is a left turn prohibition from E Fordham Rd onto Webster Av in the Bronx, you cannot legally follow the route of US-1 South. The left onto Washington Av followed by the right onto E 189 St is signed as TO SOUTH US-1.

One way to deal with this situation would be to reassign the detour around the block as the official routing for the southbound direction and leave the northbound routing be like with a one-way pair, but since route numbers are basically irrelevant in NYC, I don't think the discontinuity really concerned anyone.

How common is this situation? I'm interested mainly in routes that are not physically discontinuous, but where following the route in at least one direction would be illegal for a passenger car. Obviously roads that are closed temporarily or seasonally don't count.

[NE2]

Bike Route 20 turns left at Masonic and McAllister in Frisco:

(until recently there was no median, so it was possible but not legal to turn left)

[Mapmikey]

US 33/VA 33 EB movement cannot legally (or physically for that matter) occur leaving US 250 Broad St in Richmond VA.

[Max Rockatansky]

I'm a little off the theme the OP was going for but you can't follow CA 39 and CA 173 in parts of California due to closures due to eroding roadway or rock slides.  In the case of the 173 I believe that the closed part was actually abandoned by the state and they might not have a right-of-way claim on it anymore. 

[mrose]

Does US 34 / 36 count in Rocky Mtn National Park?

You can't go through on either route unless you pay for admission.

[webny99]

SD 87 (Needles Highway) requires admission, too, but I don't think that's what the OP is looking for.

In before someone mentions every toll road in existence

[Max Rockatansky]

Does US 34 / 36 count in Rocky Mtn National Park?

You can't go through on either route unless you pay for admission.

Winter closures maybe?  You in theory could try to wedge a snow cat or snow mobile "illegally"  past any gates.  I'm fairly certain in some National Parks it's actually legal to use a snow capable conveyance on closed seasonal roads. 

[hbelkins]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

[US 89]

Don't quote me on this, but I'm fairly sure US 85 is now discontinuous in Colorado. If I remember this right, it ends at the bridge over I-25 in Stratmoor, where there is no interchange.

There are a whole bunch of numbered state routes in Utah that are off-limits to the public, but none are signed to my knowledge. For example, SR 298 and 299 are driver's license test courses, and SR 320 is the roads in the Emergency Vehicle Operations Range at Camp Williams.

[jp the roadgeek]

There are several CT state routes that become divided roadways where one side is the signed route and the other is an SR.  CT 10 South in Hamden, CT 34 west in New Haven and US 6 west on the Danbury/Bethel line at I-84 come to mind. 

[pianocello]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

I know I ran into this problem trying to clinch US 1 in DC a couple years ago. I thought the SB routing turned left from Constitution to 14th St NW, but that turn is prohibited. It doesn't help that DDOT is terrible at signing US highways.

[abefroman329]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

Maybe during rush hour?

[1995hoo]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

I believe it's illegal to go left from Rhode Island Avenue NW onto 7 Street NW, or at least it used to be. The Google Maps app on my iPad shows US-29 continuing on Rhode Island for another block and then going left on Sixth, left again on Florida Avenue, and finally right onto Seventh.

[jp the roadgeek]

MA 1A going to and from the Callahan/Sumner tunnels.  MA 1A runs as a silent concurrency with US 1 (which passes the exit in a concurrency with I-93), but the only connections are from 93 south to 1A north and 1A South to 93 north.  To follow them going north, you would have to make a hairpin turn from 93 and go the wrong way up the ram coming from the Sumner Tunnel.  Going south, you would have to go the wrong way on the ramp from 93 south, then hook a hairpin from the ramp to 93.

[bzakharin]

NJ 47 Northbound has a gap at the northern terminus of NJ 347. The portion signed "TO 47", which logically is the northern tip of NJ 347 is internally an unsigned route, so both roads have a gap there. Southbound both are continuous, however.

[TheHighwayMan3561]

If I recall you cannot turn left to stay on US 90 eastbound at US 61's southern terminus in New Orleans.

[froggie]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

I believe it's illegal to go left from Rhode Island Avenue NW onto 7 Street NW, or at least it used to be. The Google Maps app on my iPad shows US-29 continuing on Rhode Island for another block and then going left on Sixth, left again on Florida Avenue, and finally right onto Seventh.

It's also signed as such.

The US 1 turn entails turning onto 15th from Constitution, but I don't believe that one is signed.

[bugo]

There are a whole bunch of numbered state routes in Utah that are off-limits to the public, but none are signed to my knowledge. For example, SR 298 and 299 are driver's license test courses, and SR 320 is the roads in the Emergency Vehicle Operations Range at Camp Williams.

There are some unsigned highways in Arkansas that are either not open to the public or not open to motor vehicle traffic. There are state highways behind prison walls and there are some on college campuses that are open to pedestrians only.


Nexus 5X

[The High Plains Traveler]

 

Don't quote me on this, but I'm fairly sure US 85 is now discontinuous in Colorado. If I remember this right, it ends at the bridge over I-25 in Stratmoor, where there is no interchange.

This is true (you beat me to it). Technically, it's U.S. 85-87, though 87 isn't marked. This happened when the state entered into agreements with El Paso County and the city of Colorado Springs to exchange jurisdictions. The state gave up jurisdiction over 85-87 north of the I-25 overpass to the city, while continuing to maintain the road south through Security and Fountain. Unfortunately, there is no interchange here, so the only evidence is an END STATE MAINTENANCE sign. There are also two locations along U.S. 24 in northeast Colorado where the route simply ends and the road continues as a county road. I don't think these locations were approved by AASHTO, but the Colorado Springs example was.

[ErmineNotyours]

Looking through Oregon's Digital Video Log, I noticed it covers part of old US 30 that is now open only as a pedestrian and bicycle trail.  This seems to indicate it's still part of the state system, but you can't drive on it.

[jeffandnicole]

NJ 324 is a closed road for much of its distance. Being the sign is regulatory in nature, you're not supposed to be on it.

https://goo.gl/maps/JxgJMEnVnk52

[mrsman]

Didn't US 29 in DC once fit this subject? Wasn't there a place where you could not make the required turn to stay on the route?

I believe it's illegal to go left from Rhode Island Avenue NW onto 7 Street NW, or at least it used to be. The Google Maps app on my iPad shows US-29 continuing on Rhode Island for another block and then going left on Sixth, left again on Florida Avenue, and finally right onto Seventh.

It would seem more straightforward to go from RI, right on Q, left on 7th.