informational united states mutcd road signs

acer amphitheater amphora area arrow backpack beacon beam binoculars biology brown building cartwheel cultural culture direction dots falling feature field glass glasses guide hiking history information interest interpretive jug leaf light lighthouse look lookout magnifier magnifying map maple mutcd nature orientation outlook overview person radar radio ray resarch rocks route shape sign silhouette states stone study telescope theater through tourism tourist tower trail united usa view watch wave waves wheel