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 ...

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 ...

Police officers had been directing traffic at several intersections ... Communicate: If confusion arises, use hand gestures or lights to signal your intent. Most of the outages, affecting ...