Alabama

State Highways

Present
1948


Alaska

State Highways

Present


Arizona

State Highways

Present
1948

Loop Route 101
Loop Route 202
Loop Route 303


Arkansas

State Highways

Present
1948


California

State Highways

Present
1948

U.S. Highways

U.S. 101. This cutout style is currently being used for all U.S. highways in California. Some other states use a similiar style sporadically.
U.S. 97 - two-digit U.S. highway
U.S. 6 - one-digit U.S. highway
Old style U.S. 99 sign. It still stands.