Drones used to monitor traffic during May Day holiday in S China
A traffic police monitors highway condition through images sent back by a drone in Guangzhou, capital of south China's Guangdong Province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday. (Xinhua/Liang Xu)
Two traffic police officers prepare a drone to help them monitor highway condition in Guangzhou, capital of south China's Guangdong Province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday. (Xinhua/Liang Xu)
A traffic police controls a drone to patrol for highway conditions in Guangzhou, capital of south China's Guangdong Province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday. (Xinhua/Liang Xu)
Two traffic police officers prepare a drone to help them monitor highway condition in Guangzhou, capital of south China's Guangdong Province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday. (Xinhua/Liang Xu)
A drone patrols above a high way in Guangzhou, capital of south China's Guangdong Province, May 2, 2016. The traffic police used drones to help them patrol during the three-day May Day holiday. (Xinhua/Liang Xu)