States that have signs that tell the name of the road on an freeway overpass.

[ce929wax]

Here in Michigan on all of our freeways there is a green sign that tells the name of the road that the overpass is going over or under.  I know that Indiana does this as well, and Alabama will do it and tell the milepost of the bridge.  I was curious if any other states do this too.

[tdindy88]

I recall them in Wisconsin and in the Chicago area, though I don't think all of Illinois has them. Tennessee has white on blue signs at overpasses in urban areas, but not in the rural areas.

[KEK Inc.]

Most states do it consistently.


...except mutant California.

[Brandon]

I recall them in Wisconsin and in the Chicago area, though I don't think all of Illinois has them. Tennessee has white on blue signs at overpasses in urban areas, but not in the rural areas.

No, Illinois is inconsistent.  Some IDOT districts are better than others, and then there's ISTHA.  ISTHA tends to post of every overpass and underpass.  IDOT District 1 (Chicago) is very good at it, but does not post the overpass or underpass when there is an exit ramp in that direction.  District 2 (Rock Island) is bad at signing the overpasses and underpasses - they are rarely signed

[DandyDan]

I believe Minnesota posts all signs for overpasses and underpasses as well, at least they did on I-35 and I-35E and the small bit of I-90 I was on last year.

[thenetwork]

Some of the oldest stretches of I-71 in rural Ohio used to have black-on-white signage on overpasses, but they phased those out in the early 80s. 

On the flip side, the Ohio Turnpike in the 90s started signing every crossing & overpass.  Prior to that, they would only label numbered highways which crossed over the turnpike with their respective shield.  As for the other interstates, it is hit & miss (mostly miss) both in the city and the country.

Next door in Pennsylvania, they are pretty good at labeling roads you cross over & pass under on the interstates.

Pretty much non-existent in Colorado, except for the stretch of I-70 in Grand Junction between the termini of BL-70. 

[dfilpus]

North Carolina labels all state maintained highways with their highway numbers. This includes the SR routes, which are labeled simply with their four digit numbers, which are not posted prominently on the routes themselves. It is a little disconcerting to be on I-85 and see the I-85 labels on the bridges where the carriageways switch sides between Lexington and Thomasville.

[hbelkins]

Kentucky does not do this. Neither does West Virginia.

Kentucky policy is to note the route number of a state route when the interstate goes over or under that route, but it's done inconsistently. The policy doesn't extend to named county routes, which generally aren't signed with route numbers, but there are some exceptions on I-75 in District 6 (northern KY).

[Beeper1]

Massachusetts always has the road name and the town name on all overpasses.
Connecticut posts the road name on all overpasses.

[xcellntbuy]

New York started doing it in the mid-1990s.

[ET21]

I recall them in Wisconsin and in the Chicago area, though I don't think all of Illinois has them. Tennessee has white on blue signs at overpasses in urban areas, but not in the rural areas.

No, Illinois is inconsistent.  Some IDOT districts are better than others, and then there's ISTHA.  ISTHA tends to post of every overpass and underpass.  IDOT District 1 (Chicago) is very good at it, but does not post the overpass or underpass when there is an exit ramp in that direction.  District 2 (Rock Island) is bad at signing the overpasses and underpasses - they are rarely signed

They replaced all the signs along the tollways to these small squares, and there are many missing in-between

[PHLBOS]

PA has had them for at least 2 decades

[bassoon1986]

Alabama does. I know I've seen them on I-10. I don't remember about the rest of the state.

Texas does in urban areas

[Mr_Northside]

Next door in Pennsylvania, they are pretty good at labeling roads you cross over & pass under on the interstates.

I'll agree they're pretty good at putting the signs on the overpasses, though I don't see labels for routes crossing under nearly as often.  And consistency of this, in general, probably varies by district.

[agentsteel53]

the only state I can think of which very consistently signs both over- and underpasses is Arizona.

[TEG24601]

Washington seems pretty consistent in doing this on I-5 and I-405, but is terrible on I-90, mainly due to the rural nature of most of I-90s route.  Most of the state operated expressway/freeways are in and around Seattle, and are therefore well marked.

[Brian556]

Texas does using green signs. Tenn uses blue signs.

[amroad17]

Kentucky does not do this. Neither does West Virginia.

Kentucky policy is to note the route number of a state route when the interstate goes over or under that route, but it's done inconsistently. The policy doesn't extend to named county routes, which generally aren't signed with route numbers, but there are some exceptions on I-75 in District 6 (northern KY).

Northern Kentucky started posting many over/underpasses in the past year or so.  I-275, I-71/75, and I-75 south of the I-71 split have pretty much posted street names or route numbers at every over/underpass.

Virginia has many (95%) signed.

[empirestate]

New York varies by DOT region: some do overpasses, some add underpasses, and some do nothing. The Thruway does overpasses as well as waterways (under, obviously). I-390 has some of the earliest, as well as newest, instances of this, and is a great case study of every different type of sign you could want: all caps, mixed-case, old fonts, new fonts, overpasses only, over- and underpasses, and some unmarked areas as well.

[sp_redelectric]

Oregon is generally good about this, however signs on I-5 in southwest Portland were just recently added within a few years.  Oregon 217 doesn't have them for the most part, but most of the overpasses are part of an interchange so the signs are redundant.

[jp the roadgeek]

Massachusetts always has the road name and the town name on all overpasses.
Connecticut posts the road name on all overpasses.

Some of the newer identifying signs, especially on the Merritt Parkway, are now located on an LGS on the right just before the overpass

[empirestate]

Massachusetts always has the road name and the town name on all overpasses.
Connecticut posts the road name on all overpasses.

Some of the newer identifying signs, especially on the Merritt Parkway, are now located on an LGS on the right just before the overpass

Makes sense, as you wouldn't want to mar the façades of the Merritt Parkway bridges, which are all historic engineering landmarks.

[Urban Prairie Schooner]

These do not exist in either LA or MS. I remember traveling to other states for the first time and being impressed that the DOT actually took the time to do such a thing.

[pianocello]

My favorite is the Ohio Turnpike, where the state and US routes are marked by shields on overpasses instead of a sign saying "SR XX"

[formulanone]

Florida is pretty good about signing nearly every overpass, although it skips many underpasses.