Find out what the Guardia Civil’s yellow flag means on Spanish roads and how to react safely when you see one.

While on duty, Xiao Hu issues voice prompts to pedestrians such as, “Red light, please stop,” and uses standard traffic police hand signals to direct foot traffic across the road.

China is using technology to maintain the traffic flow on roads in Shanghai. In the latest development, unarmed Robot police have been deployed.A video making the rounds online saw a RoboCop ...