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Highway naming/USA

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This table identifies the specific naming conventions used for the various highway types for each state in the Unites States. Details of the naming convention is on the road naming page.

All interstate highways (freeways) are named the same across all states, so they are not included in the table below.

The state names are linked to the respective wiki page that provides specific editing guidelines (and other information) for that state. If the state link is red, there are no specific guidelines for that state yet. If you actively edit in that state consider creating that page and providing information to other editors in your state.

State State Highway/Route
County Highway/Road Township Highway/Road
Alabama SR-xxx CR-xxx
Alaska State Hwy xxx County Hwy xxx
Arizona SR-xxx CR-xxx
Arkansas State Hwy xxx County Hwy xxx
California SR-xxx CR-xxx
Colorado SH-xxx
(SW Forum) &
(CO Forum)&
(CO Forum)
Connecticut State Rte xxx N/A (Wikipedia)
Delaware SR-xxx (Forum)

N/A (Wikipedia)
District of Columbia State Hwy xxx County Hwy xxx
Florida SR-xxx CR-xxx
Georgia SR-xxx CR-xxx
Hawaii State Hwy xxx County Hwy xxx
Idaho State Hwy xxx County Hwy xxx
Illinois IL-xxx
(TTS="Illinois xxx")
County Hwy xxx
Indiana IN-xxx
(TTS="Indiana xxx")
When signed "County Road xxx"
Iowa State Hwy xxx County Hwy xxx
Kansas K-xxx
(TTS="kay xxx")
County Hwy xxx
Kentucky KY-xxx
(TTS="Kentucky xxx")
County Hwy xxx
Louisiana LA-xxx Parish Rd xxx
Maine State Hwy xxx County Hwy xxx
Maryland State Hwy xxx County Hwy xxx
Massachusetts (See Forum) N/A
Michigan M-xxx
(TTS="emm xxx")
Minnesota State Hwy xxx County Hwy xxx
Mississippi MS-xxx CR-xxx
Missouri State Hwy xxx
cnsd. SH-xxx
County Hwy xxx
cnsd. CH-xxx
Montana State Hwy xxx County Hwy xxx
Nebraska State Hwy xxx County Hwy xxx
Nevada SR-xxx CR-xxx
New Hampshire State Hwy xxx County Hwy xxx
New Jersey SR-xxx CR-xxx
New Mexico SR-xxx CR-xxx
New York NY-xxx CR-xxx
North Carolina NC-xxx N/A (Wikipedia)
North Dakota ND-XX County Hwy xxx
Ohio SR-xxx CH-xxx (limited use) & CR-xxx TH-xxx (limited use) & TR-xxx
Oklahoma State Hwy xxx County Hwy xxx
Oregon State Hwy xxx County Hwy xxx
Pennsylvania SR-xxx na
Rhode Island State Rte xxx N/A
South Carolina SC-xxx S-##-xxx (secondary roads)
CR-xxx# (county routes)
South Dakota State Hwy xxx County Hwy xxx
Tennessee TN-xxx
(TTS="Tennessee xxx")
County Hwy xxx
Texas SH-xxx CR-xxx
Utah SR-xxx CR-xxx
Vermont VT-xxx CR-xxx
Virginia SR-xxx < 600 & 785 & 895, VA-xxx > 600 N/A
Washington SR-xxx CR-xxx
West Virginia State Rte xxx County Hwy xxx
Wisconsin WIS-xxx
(TTS="Wisconsin xxx")
Wyoming State Hwy xxx County Hwy xxx

Note: Some states are in the process of considering a change and may be designated with cnsd.

If you are an editor for a particular state that feels your state should consider a different format than you see above, please come to the US forums and select the sub-forum region for your state. In that sub-forum start a discussion around making a change to the naming convention for your state and tell the reasons why you think it should be done. Once consensus is reached the change can be made here.

General discussions on this page can be found in this thread.