It might be hard to believe, but there are still some incredibly useful features that can be added to Google Maps. The latest addition brings traffic-light and stop-sign icons to navigation mode. ...

Since the 1950s, all stop signs in the U.S. have been required to be red, as outlined in the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD).

If there’s one rule of the road we learn long before driver’s ed, it’s this: Red means stop. Even a toddler can tell you the right shade of a stop sign. Since roughly the 1950s, all ...