 The front doors bear the seal of the city of Los Angeles, the department slogan "to protect and to serve" as well as the citywide five-digit "shop number" and city department name (POLICE).The last three numbers of the shop number (used to identify all vehicles operated by the city) are reprinted on the roof to help air units visually identify cars.On the trunk is a number that identifies which division the unit belongs to (e.g., a 25 would be "South Traffic Division" or a 3 would be "Southwest Area").