"Considering that metro security is considered a main requisite of the Chinese transportation system, the metro authority chose Infinova because of our worldwide experience in providing such solutions, including the 1000-plus camera system that covers the Shanghai metro system in China," explains Mark S. Wilson, Infinova vice president, marketing. "We also have similar surveillance systems in countries from Turkey to the United States."

In Chongqing, cameras are located at the platforms, station centres and inside the train cars. Both the entrances and exits of metro stations have fixed cameras, each capable of viewing a person from the front as they enter a ticket-check station. In each of the metro halls, an integrated high-speed dome camera surveys the entire facility. Secluded corners also have additional fixed cameras so that these areas are not out of sight to the surveillance system.

Cameras are also on the platforms to give rail system administrators an overview of passenger flow. As a result, the system can monitor passengers entering and leaving the station centres and the cars to prevent and detect crimes, including potential terrorism and kidnapping.