Highway Classification Abbreviations

[realjd]

In Texas they are as follows:
IH-Interstate Highway (TxDOT uses "IH"; most cities use "I" )
US-US Highway
SH-State Highway
FM-Farm To Market Road ("FR" was formerly used, have seen it on a few old signs)

TxDOT uses the "IH" on it's signal-mounted street name signs. I think the reason is that on TxDOT doccuments there is a two-letter classification of each highway type.

Does any other state use "IH"?
In Texas, State highways are "SH". What, if any, other states use "SH" vs "SR"

Concerning the "FR", I saw that abbreviation on a "LOAD ZONED BRIDGE XX MILES AHEAD..." sign that we replaced in the mid 2000's. I also saw it on a few on Krum's street name blades. I think those don't exixt anymore

Don't forget that in West Texas, they use RM instead of FM (Ranch-to-market).

Florida uses I-95, US-1, SR-528 (state road), and CR-507 (county road).

Interestingly, county maintained toll freeways like the 408 in Orlando are given state highway designations even though they're county owned and maintained.

[J N Winkler]

I don't really know why some junctions are wyes and some are T's...

Back in the 1930's there was a theory (not exploded until the 1950's, I think) that wye configurations improved safety by separating conflict points.

[SkyPesos]

Sorry for the bump...

Adding on, for the states that use SR, which states use it as an abbreviation for "State Route", and which for "State Road"? I know Ohio's SR is for "State Route", while Indiana's is "State Road", but how about some other states?

[froggie]

^ "Secondary Route" in Virginia.

[hotdogPi]

^ "Secondary Route" in Virginia.

I would have mentioned it myself if not for this:

PA actually uses SR on its small indicator signs.

Doesn't that stand for secondary route, though?

This map is for primary state highways, so secondary ones wouldn't count.

VA needs to have its red removed, then – SR definitely means secondary route there.

Virginia uses SR for primary routes as well, according to the abbreviations on Wikipedia. VA xx is less common. It's just a blanket designation, I don't believe it actually serves to distinguish anything.

Edit: I somehow removed one of the quoted posts in this by mistake. Oops. Anyways, the route referenced there (420) is a primary one. If this is common I'll have to update the map. Or not. I didn't make it to be actually used, only out of boredom.

[US 89]

Sorry for the bump...

Adding on, for the states that use SR, which states use it as an abbreviation for "State Route", and which for "State Road"? I know Ohio's SR is for "State Route", while Indiana's is "State Road", but how about some other states?

State Road is pretty rare I think. Florida comes to mind off the top of my head. New Mexico is also officially a State Road state, but they use NM xx for them rather than SR xx.

[froggie]

^^ General parlance in Virginia is that SR refers to the secondary routes while primary routes are simply "Route xx".  "VA xx" is uncommon but not unheard of.