- U.S. Route 2 Business (Wenatchee, Washington), 1975-92
- U.S. Route 10 Alternate (Seattle, Washington), 1940-55
- U.S. Route 10 Alternate (Washington-Idaho-Montana), 1940-48 (existed outside Washington until 1968)
- U.S. Route 97 Alternate (Yakima, Washington), 1957-89
- U.S. Route 97 Alternate (Washington), 1989-present
- U.S. Route 97 Business (Okanogan, Washington), -present
- U.S. Route 99 Alternate (Burlington-Bellingham, Washington), 1937-61
- U.S. Route 99 Alternate (Bellingham-Lynden, Washington), 1953-70
- U.S. Route 101 Alternate (Washington), 1939-present
- U.S. Route 195 Spur, -present
- Interstate 5 Business (Vancouver, Washington)
- Interstate 5 Business (Castle Rock, Washington), -present
- Interstate 5 Business (Chehalis-Centralia, Washington)
- Interstate 5 Business (Olympia, Washington)
- Interstate 5 Business (Everett, Washington)
- Interstate 5 Business (Bellingham, Washington)
- Interstate 82 Business (Yakima, Washington)
- Interstate 82 Business (Sunnyside, Washington)
- Interstate 90 Business (Cle Elum, Washington)
- Interstate 90 Business (Ellensburg, Washington)
- Interstate 90 Business (Moses Lake, Washington), -present
- Interstate 90 Business (Ritzville, Washington)
- Interstate 90 Business (Spokane, Washington)
Two bridges that were in early versions of the 1991-92 bill: