storey Jamarat bridge is air-conditioned at 19 degrees Centigrade, or 66 Fahrenheit, throughout the day and backed by water sprinklers that can reduce the temperature to about 29 degrees C, or 84 F. The bridge is designed to allow the addition of seven more levels to hold as many as 5 million pilgrims in the future if the need arises. According to authorities, the bridge is 950 meters (1,039 yards) long and 80 meters (87 yards) wide. Each floor is 12 meters (13 yards) high with three tunnels and 12 entrances and 12 exits in six directions. It has a helicopter pad for emergencies. According to Col Mohammadi, the project has 509 advanced closed-circuit television cameras monitoring pilgrims" movements. Those cameras feed into the main operations room, which oversees the Jamarat Bridge and the surrounding areas -- all screened by dozens of security officers on 72 monitors at the operation room.
