Vehicle activated sign (VAS) is a generic term for a type of road traffic sign which displays a message conditional upon the presence, or speed, of a road vehicle. The devices are deployed on roadsides like regular traffic signs in various countries. They are intended to help drivers by alerting them and drawing attention to danger or other undesirable situation.
Read more about Vehicle Activated Sign: Sign Effectiveness
Famous quotes containing the words vehicle and/or sign:
“How strange a vehicle it is, coming down unchanged from times of old romance, and so characteristically black, the way no other thing is black except a coffin—a vehicle evoking lawless adventures in the plashing stillness of night, and still more strongly evoking death itself, the bier, the dark obsequies, the last silent journey!”
—Thomas Mann (1875–1955)
“Old age likes indecency. It’s a sign of life.”
—Mason Cooley (b. 1927)