The Indian city of Mumbai has installed loop detectors beneath key roads in order to keep a check on vehicles travelling in or out of the city roads.

The detectors, supplied by Spanish firm Telvent, can count the number of vehicles, identify their types and count diversions made at different junctions.

The sensors are connected to the recently installed traffic signals, which are then connected to the traffic police control room where details can be viewed on a screen.

Nearly 53 traffic signals have been placed under the road junctions between Colaba to Haji Ali in the city so far.

An additional 200 detectors will be installed between Haji Ali to Borivli and between CST to Chembur, according to city transport officials.

The $11.5m (INR 53 crore) project has been funded by the World Bank and carried out by the by the Mumbai Metropolitan Region Development Authority with the help of city’s public bus service BEST.