Adopt a Highway: What are those Adopt a Highway signs all about?

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Adopt Highway: Over 15 Royalty-Free Licensable Stock Illustrations & Drawings

Adopt-A-Highway, Statewide M & O, Transportation & Public Facilities, State of Alaska

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Adopt A Highway Sign_20180329_111838, This one has one of t…

Adopt a highway sign hi-res stock photography and images - Alamy

Caltrans Expands $250 Incentive to Adopt-A-Highway Volunteers Throughout the State - Redheaded Blackbelt

Mo. neo-Nazis join `Adopt-A-Highway' trash cleanup - The San Diego Union-Tribune

PA Adopt-A-Highway, US 30 east in Ardmore, PA. This shows a…