Red is used exclusively for regulatory road signs prohibiting doing something. So, a stop sign is red because you are ...

KNOX COUNTY, Tenn. — Traffic signs help guide drivers safely through intersections, neighborhoods and construction zones. But few people stop to consider where those signs come from — or who’s behind ...

When traveling, it's normal to look out for gas stations, rest stops, police cars and more. However, there are plenty of other interesting things that can catch your eye. (For example, unique bumper ...

The future for autonomous vehicles (AVs) is bright—but only if roadway signage and signals remain visible. AVs require clearly visible infrastructure to navigate roads. A lack of it puts both machines ...