Highway naming

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 (TTS=....)	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 (currently under discussion)	CR-xxx
Colorado	SH-xxx (SW Forum) & (CO Forum)& (CO Forum)	CR-xxx
Connecticut	SR-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	SR-xxx	CR-xxx
Idaho	State Hwy xxx	County Hwy xxx
Illinois	SR-xxx	CR-xxx
Indiana	IN-xxx (TTS="Indiana xxx")	CR-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")
Louisiana	LA-xxx (TTS="Louisiana xxx")	Parish Rd xxx
Maine	State Hwy xxx	County Hwy xxx
Maryland	MD- (TTS="Maryland xxx")	County Hwy xxx
Massachusetts	(See Forum)	N/A
Michigan	M-xxx (TTS="emm xxx")	CR-xxx
Minnesota	State Hwy xxx	County Hwy xxx
Mississippi	MS-xxx (TTS="Mississippi xxx")	CR-xxx
Missouri	MO-xxx (Primary numbered) (TTS="Missouri xxx") State Hwy xxx (Sec lettered) cnsd. SH-xxx	CR-xxx
Montana	State Hwy xxx	County Hwy xxx
Nebraska	State Hwy xxx	County Hwy xxx
Nevada	NV-xxx (TTS="Nevada xxx")	CR-xxx
New Hampshire	State Hwy xxx	County Hwy xxx
New Jersey	NJ-xxx (TTS="New Jersey xxx")	CR-xxx
New Mexico	SR-xxx	CR-xxx
New York	NY-xxx (TTS="New York xxx")	CR-xxx (TTS="County Road xxx")
North Carolina	NC-xxx (TTS="North Carolina xxx")	N/A (Wikipedia)
North Dakota	ND-xxx (TTS="North Dakota xxx")	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	RI-xxx	N/A
South Carolina	SC-xxx (TTS="South Carolina xxx")	S-##-xxx (secondary roads) CR-xxx# (county routes)
South Dakota	SD-xxx (TTS="South Dakota xxx")	CR-xxx
Tennessee	TN-xxx (TTS="Tennessee xxx")	CH-xxx
Texas	SH-xxx	CR-xxx
Utah	SR-xxx	CR-xxx
Vermont	VT-xxx (TTS="Vermont xxx")	CR-xxx
Virginia	SR-xxx < 600 & 785 & 895, VA-xxx > 600 (TTS="Virginia xxx")	N/A
Washington	SR-xxx	CR-xxx
West Virginia	State Rte xxx	County Hwy xxx
Wisconsin	WIS-xxx (TTS="Wisconsin xxx")	CH-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.