Pit Stops: Technologically driven system that incorporates the use of 45 cameras will feed video of every stop made by every team to a central location, where eight officials will log pertinent information and report any violations.
The transponder system is the key to determining every car’s position on the track at the exact moment a caution is thrown. Each car carries a radio transponder that gives off a short range radio transmission of a seven-digit code number. By NASCAR rules, the transponders are mounted on the fuel cell. At varying points around a track, wire loops are embedded about a foot (0.3 meters) below the track surface. These loops receive the transmission from the transponder. NASCAR can also deploy free-standing transponders around a track if they want higher resolution. The loop immediately sends this information, via a wireless network — with redundant fiber optic connections, just in case — to a computer system that logs each car as it passes each loop and at what specific time. This system can be used to track where cars are in relation to each other on the track and it can also record lap speeds. The information is even sent to laptop computers used by the pit crews, so they can see scoring and timing data in real time.