will call for a "safety car" period, which would see marshals wave yellow flags and hold "SC" boards, pending the car in question entering the track. From 2007, all Formula One cars must have LEDs and/or displays fitted to the steering wheel or cockpit, which inform the driver which flags are being waved. A yellow LED is illuminated when the safety car is deployed. The safety car has both orange and green lights mounted on its roof in the form of a light bar. The green lights are used to signal that it is possible to overtake the safety car; this is only done until the race leader is immediately behind the safety car and at the head of the queue of race cars following. From 2015, the safety car is not required to wait until all backmarkers have caught back up to the queue. When the safety car is ready to leave the circuit, it will turn off its orange lights to indicate that it will enter the pit lane at the end of the lap. Drivers must continue in formation until they cross the first safety car line, where circuit green lights and flags will indicate they are free to race again. The safety car is piloted by professional drivers (since 2000, by Bernd Mayländer) on-board high-powered modified vehicles supplied by Mercedes-Benz and Aston Martin (the latter since the 2021 season), and must maintain a reasonable speed so as to ensure that the competitors' tyres are as close as possible to operating temperature and their engines do not overheat. The driver of the safety car is accompanied by a co-driver to assist with operations and communications. For incidents during the first three laps, the safety car also has an advantage over the traditional red flag; with a red flag, it would take a minimum of fifteen minutes to restart the race, and the two-hour limit would not start until the cars were ready for a second formation lap. With regards to the time limit, the race is being scored and the time is also counting while the safety car is on the track, and the race resumes. History The first use of a safety car in Formula One is reported to have taken place at the 1973 Canadian Grand Prix, where a yellow Porsche 914 was called for duty following various incidents under treacherous weather conditions. Controversially, on