Unsigned concurrencies

[jp the roadgeek]

For many years, MA 183 was not co-signed with MA 57 then MA 23 then US 7.  So you had CT 183 which turned into a MA 183 segment that was often unsigned on maps that seemed to end at MA 57.  Then another Route 183 segment that paralleled Route 7 from Great Barrington to Lenox.  Finally, MassDOT put up little 183 signs along those roads to connect the segments.

Was also driving the CT/MA 10/US 202 segment the other night, and some signs had just the Route 10 shield and not the (unnecessary) 202 shield.  Also saw a MA 202 sign on the solo route just west of Holyoke.

[NE2]

Alabama, Florida, and Tennessee have deliberately unsigned state routes on all U.S. Routes. Florida and Georgia also have them on Interstates. So there's no point in listing those.

[Urban Prairie Schooner]

Driving along LA 75 today (River Road), I ran into LA 141 turning to the right, towards the river, and using the right-facing arrow showing that it started at LA 75. Due to the curve of the river, I decided to take the route at the southern terminus and follow it along the river. Sure enough, I was following LA 141 down the curve of the river, when I met a sign that said "LA 141 Ends in 0.7 Miles." Since LA 141 is actually a continuous route, and the Louisiana DOTD doesn't do routes in sections anymore, LA 141 actually follows an unsigned concurrency with LA 75.

From what I always understood, LA 141 was a formerly continuous route with its middle section turned back, leaving two separate sections. The Point Clair area is property of the Elayn Hunt Correctional Center and former LA 141 through this area is gravel.

[hbelkins]

Alabama, Florida, and Tennessee have deliberately unsigned state routes on all U.S. Routes. Florida and Georgia also have them on Interstates. So there's no point in listing those.

It's been my experience that Alabama is hit-and-miss about posting the state route companions to the US routes. Tennessee has started posting some of the hidden state routes (US 321 and TN 32 between Cosby and Newport, for example).

But there are several places I've seen in Tennessee where one route joins another and disappears, only to re-emerge at another intersection. In many cases it's where a primary and a secondary overlap.

I still can't figure out TN 66, though. Some maps show it in separate segments between Kodak (Exit 407 on I-40) and Morristown, while others show it routed onto the connecting highways.

[vtk]

If you believe the official map (© Seeger Map Co), Franklin County, Ohio assigns county road numbers to the state and US routes (but not Interstates) in unincorporated parts of the county (and apparently extending into incorporated municipalities, but the normal county road designations appear to do that on the map too). These numbers appear random and range from 4 to 911, wheras regular county road numbers are almost always less than 300. Interestingly, the numbers 4 and 5 match the pre-1926 state route designations of what is now US 23.  I don't see county road number assignments for National Rd / (W) Broad St / Main St – but I don't see a C1 anywhere else, so that could be it...  No other numbers appear to match current or former state route numbers.  Dublin — Granville Rd is C546, whether or not it is also OH 161.

As far as I know, none of these designations are signed in the field (except probably C546 / Dublin — Granville Rd / old OH 161 near New Albany).

[JustDrive]

Some California, off the top of my head:
CA-1 along US-101 between Seacliff and Las Cruces, and spotty between Las Cruces and Oxnard;
CA-16 along I-5/US-50 between Woodland and Sacramento (used to have better signage);
CA-99 along US-50/I-5 in Sacramento (ditto);
I know there's plenty more.

I-5 and I-10.  Only the 5 is signed on the Cesar Chavez and 4th Street entrance ramps.

I always thought it was weird that there was an "END 1" sign on the SB 1/SB 101 ramp in Las Cruces, but there's a "101/1 NORTH" sign in Seacliff (before it was re-signed, it used to say "TO 1").

[jp the roadgeek]

Unofficially, there's a couple in PA as well.  PA 100 South of US 322 has been decommissioned, but it used to connect down to DE 100. Also, what about the separate PA 29 segments?  It just disappears in Allentown and reappears near Wilkes Barre, and they also used to be connected. Finally, one can make a case for the separate US 422 segments.

[apeman33]

Kansas signs every duplex/multiplex/concurrency although I've seen some inconsistency in the Kansas City area. It can be hard to tell where U.S. 169 is going but that may have to do with the fact that they've changed it's routing twice (at least) in the last 15 years.

I noticed in the Overland Park area last year that signage is irregular. In some places, 169 isn't posted. In others, it's 56 that's "invisible".

Sometimes, I wonder if KDOT has put the signing of those routes into the hands of the municipalities, particularly Overland Park and KCK, and that this might explain the inconsistencies.

For instance, when you approach the junction of U.S. 169 from the east on Shawnee Mission Parkway, I wager most travelers won't know they were already on U.S. 56. And westbound travelers don't know where U.S. 56 goes from there.

[roadman65]

I like the way Indiana does it for the I-465 where all the US routes enter the highway.  They have one exit guide at the top of the ramp (some do not as US 36 and US 40 did not in 08) stating where to exit the I-465 to continue.

In Florida from Leesburg to Mount Dora we have FL 44 concurrent with US 441, yet no signs except for TO FL 44 where eastbound FL 44 merges on to US 441 SB.  I have no idea what WB FL 44 has where it joins US 441 NB, so I cannot say for sure.

FL 19 has a silent wrong way concurrency with US 441 from Tavares to Eustis overlapping  FL 44 as well, so those traveling FL 19  NB will not able to know where they junction with FL 44 except NB on US 441 where SB FL 19 leaves to head south toward Howey- In- The- Hills (always liked that name) there is a TO WEST FL 44 shield in place there. I believe in Eustis there are some FL 44 shields that direct motorists over to EB FL 44 at the original FL 44 alignment that went through Eustis and around the north side of all the chain lakes along US 441 now known as Lake County Road 44.  That may be why no signs as you do have the county designated Route 44 nearby, but I doubt anyone would confuse the two as we Floridians take descriptors on highways seriously.  ie I-4, US 1, State Road 50, CR 535 etc.

[national highway 1]

Some California, off the top of my head:
CA-1 along US-101 between Seacliff and Las Cruces, and spotty between Las Cruces and Oxnard;
CA-16 along I-5/US-50 between Woodland and Sacramento (used to have better signage);
CA-99 along US-50/I-5 in Sacramento (ditto);
I know there's plenty more.

I-5 and I-10.  Only the 5 is signed on the Cesar Chavez and 4th Street entrance ramps.

I always thought it was weird that there was an "END 1" sign on the SB 1/SB 101 ramp in Las Cruces, but there's a "101/1 NORTH" sign in Seacliff (before it was re-signed, it used to say "TO 1").

CA 1 and US 101 across the Golden Gate Bridge.
Are the CA 1/I-280 and the CA 35/ I-280 duplexes signed at all?

[TheStranger]

CA 1 and US 101 across the Golden Gate Bridge.

There aren't any trailblazers for any route on the bridge itself, actually.  (This is a function of the bridge being maintained by the Golden Gate Bridge, Highway, and Transportation District - NOT CalTrans)  North of the bridge, several 101/1 markers DO exist.

Are the CA 1/I-280 and the CA 35/ I-280 duplexes signed at all?

Both are very well-signed.

SF used to have one other concurrency - 80/101 on the Central Freeway in the 1960s - and the pull-throughs on 80 west along the Skyway continued to hint at this double designation until the late 80s (there's one Youtube video ca. 1984 that has an 80/101 Civic Center sign visible).