Check (pattern) a board used for playing checkers and chess, and in heraldry. The check pattern has a number of symbolic meanings. In auto racing, the chequered flag is displayed at the finishing line to signal that the race has finished. It originates from the "checkers" who watched the finishing line and checked when cars had finished the race. They began using chequered flags to identify themselves. In some countries, the check pattern has become a symbol of the police. Known as "Sillitoe Tartan", it was first used in Glasgow in the 1930s and was inspired by a pattern worn by some
Police vehicles in the United Kingdom users to their presence or when the driver feels that the journey needs to be undertaken urgently. These lights are usually mounted on the roof and incorporated into the standard vehicle system of external lights. Most police vehicles are also fitted with a siren. In addition to blue lights, many traffic and incident response cars are fitted with flashing red lights that are only visible at the rear of the vehicle. These indicate that the vehicle is stopped or moving slowly. Police vehicles may carry: Most cars and police motorcycles are fitted with a 'Runlock' system. This allows the vehicle's