Pittsburgh Police hats with checkered bands, which are dark navy blue and gold in color, popularly known as the "Sillitoe Tartan" and named after its originator, Percy J. Sillitoe, Chief Constable of Glasgow, Scotland, in the 1930s. While the checkered band is a common police symbol in the United Kingdom, Australia and some European countries, the Chicago Police Department, Cook County Sheriff's Police, the Allegheny County Sheriff's Office, and the Pittsburgh Bureau of Police are the only police forces in the United States that have adopted it as part of their uniforms. As recently as July 1930, police were required to wear
Police vehicles in the United Kingdom covert cars and unmarked transport vehicles for discreet escort of civilians or prisoners. Marked variants of these cars feature a single row of battenburg police markings on each side of car with 'Police' lettering on the front and rear of the vehicle. Badges or slogans from police forces can be found on the front and sides of marked cars in most areas to identify the force it belongs to. Most marked cars also have hi-vis chevrons on the back. These vehicles are used for attending 999 calls and patrolling in targeted areas, where a police officer may be needed more