Unless it's at night, in which case hand signals ... like a traffic stop or accident -- something that's best to slow down for, regardless. The two primary ways to signal police activity is ...

This is the amusing moment a wild monkey directed cars like a traffic cop - after picking up the hand signals from watching ... the hand gesture from traffic police in the area.' ...

The National Police Agency is moving to create a nationwide system based on a smartphone app that informs blind and visually impaired people the color of traffic signals at intersections. Noboru ...