<Li> Amber only: Utility vehicles, Civil Aid Service, all vehicles in the air - side of the airport (for pilots' visibility), Hong Kong Immigration Department vehicles </Li> <P> Under the Indonesian Legislation number 22 year of 2009 section 59 the colors and users of lightbars are: </P> <Ul> <Li> Blue: Indonesian National Police and escort units </Li> <Li> Red: Ambulance, fire brigade, and Search & Rescue units </Li> <Li> Amber: Tow Trucks, and Road engineer vehicles </Li> </Ul> <Li> Blue: Indonesian National Police and escort units </Li>

When did police cars start using blue lights