Traffic signs and traffic signals and markings placed or erected by local authorities pursuant to this title shall conform in size, design, and color to those erected for the same purpose by the Department of Transportation.
Size, design, and color of signs, signals, and markings erected by local authorities
Va. Code Ann. § 46.2-1312, under Chapter 13. Powers of Local Governments..
Va. Code Ann. § 46.2-1312