based on the types of modifications they have, and are run heads up (no handicaps) in a traditional drag racing eliminator format until the winner is determined. No Prep The track surface is not treated with PJ1 Trackbite or other chemicals it would normally be for a traditional event, and sometimes the clocks are turned off (except for the officials and the time slip). The purpose of a no prep race is to simulate the marginal track surface conditions typically found on public roadways. Racers who prefer this type of event typically do so because it allows the competitors to show that their cars could actually be competitive on a public roadway without the need to risk racing on the street. However, this can be controversial. In 2012, the FIA European Drag Racing Championship cancelled championship status at the Hockenheimring round after Formula One authorities demanded all treatment be sandblasted off the entire drag strip as Formula One teams could use the launch pad area (which doubles as the runoff headed to the final turn of the road course) to gain traction in an advantageous way. The track effectively became "no prep" at the drag racing meet weeks later, and after numerous complaints about the no-prep surface the event was run without championship status. Roll Race The cars are typically up to 100 meters (110 yards) behind the start line when a signal is given for the cars to go. The cars roll past the Christmas tree at past the timing beams to start the race. This form of drag racing on land is similar to drag boat racing on water. Instant Green The Christmas Tree is programmed, once both cars are staged, to skip the yellow light countdown and immediately turn on the green light when the computer activates the start sequence randomly after both cars are staged. This is similar to "stop light" drag racing where street racers left on the traffic light turning green. Street Drag A standard drag race between any two street-legal vehicles to be the first to cross a set finish line. The race follows a short, straight course from a standing start over a measured distance, most commonly 1⁄4 mi (1,320 ft; 402 m), with a shorter (1,000 ft; 305 m) distance becoming increasingly popular, as it has become the standard for Top Fuel dragsters and funny cars, where some major bracket races