Wikipedia:Naming conventions (U.S. county roads)

This Naming Convention is intended to standardize the naming formats used in articles pertaining to county roads or their equivalents in the United States.

The highway types covered by this convention have two naming formats—official name and article title—which can be the same. The official name is the naming format typically used by the county road commission, county road department, or the general public, and is what should be used to refer the highway in article prose. The article title is a disambiguated form obviously used for article naming, and should only be used in article prose if a sentence would otherwise be ambiguous. In cases where a local road name is the common name instead of an official designation, use that instead. If the same physical stretch of road changes names, such as Randolph Road, the article name should be the road name with the longest length and redirects should be created for the other names.

State/Territory/District Official name Article title Notes
Florida County Road n County Road n (X County, Florida) If the article covers a roadway in multiple counties that keeps its number across the county lines, then use "County Road x (Florida)" as the article title.
Iowa County Road n County Road n (X County, Iowa) Numbered according to a statewide grid system
Maryland Name of road County roads in Maryland are only numbered internally; use the common name instead of any internal designations.
Michigan X-n X-n (Michigan county highway) County-Designated Highways numbered according to a state-wide grid system of lettered zones
County Road n County Road n (X County, Michigan)
New Jersey County Route n County Route n (New Jersey) 500-series county routes
County Route n County Route n (X County, New Jersey) Numbers assigned at county level
New York County Route n County Route n (X County, New York) Numbers assigned at county level
Virginia State Route n Virginia State Route n (X County) Virginia has a very large secondary state highway system that encompasses all roads not in a municipality that are not primary state highways. There are no county highways except in two counties, Arlington County and Henrico County; those county highways have only internal numbers, so the article title should be the name of the road. Several secondary state highways keep their numbers when crossing county lines. For those cases, include all counties in alphabetical order in the article title, such as for Virginia State Route 620 (Fairfax and Loudoun Counties).