File:MUTCD S1-1 (old).svg - Wikipedia
File:MUTCD R9-3b.svg - Wikimedia Commons
Comparison of Gondwanan road signs - TEPwiki
File:MUTCD R10-22.svg - Wikipedia
R91-4 (CA) NO TRUCKS AXLES OR MORE NO VEHICLES WITH, 50% OFF
R91-4 (CA) NO TRUCKS AXLES OR MORE NO VEHICLES WITH, 50% OFF
File:MUTCD R7-1.svg - Wikipedia
File:MUTCD R6-1L.svg - Wikipedia
R91-4 (CA) NO TRUCKS AXLES OR MORE NO VEHICLES WITH, 50% OFF
File:MUTCD R9-3.svg - Wikipedia
R91-4 (CA) NO TRUCKS AXLES OR MORE NO VEHICLES WITH, 50% OFF