Turn Marshal
Turn marshal duties are an important part of a race event. Turn marshals are comprised of the drivers from a given race. At the end of the drivers designated race, the group of drivers on the stand will proceed to the track and take up a position on one of the designated turn marshal positions for the next group of drivers.
Transponders
Transponders are used as part of the lap counting system. Each vehicle will have either a house transponder or a personal transponder mounted in their vehicle. This transponder emits a signal that, when the vehicle crosses a loop wire buried near the beginning of the straight, is sent to a decoder in the RD booth that translates the signal into a completed lap time and assigns that lap time to the driver via the computer timing software.