Virginia:
Colored flashing lights are
permitted as follows:
Blue, Red/blue, Blue/White, Red/White/Blue:
Law enforcement
Red, Red/White:
Fire/EMS and a select few other public safety vehicles
Fire and EMS POVs and police chaplains' cars may use a maximum of two red or red and white flashing or steady-burning warning lights. (Note that these are the only vehicles that can use steady-burning warning lights.)
Amber: Towing, road construction, hazmat cleanup, trash collection, snowplows, ATM repair, hi-rail vehicles (trucks with an extra set of metal wheels to drive on train tracks),
fire/EMS (must be visible to rear), rent-a-cops, mail delivery, petroleum transport (only activated when in reverse gear),
"Vehicles used by
law-enforcement agency personnel in the enforcement of laws governing motor vehicle parking
",
"Government-owned
law-enforcement vehicles, provided the lights are used for the purpose of giving directional warning to vehicular traffic to move one direction or another and are not lit while the vehicle is in motion
", hot air balloon chase vehicles, farming vehicles, other construction, bike race escorts, TV vans, "municipal safety officers", raceway pace cars, security and firefighting, neighborhood watch,
"Vehicles that are not tow trucks as defined in § 46.2-100, but are owned or controlled by a towing and recovery business, provided that the amber lights are lit only when the vehicle is being used at a towing and recovery site
".
Purple or amber but not both: Funeral escort
Green: Emergency command center
Dealers or businesses selling emergency vehicles can put blinkies on them.
Colored warning lights are
required as follows:
Amber flashing lights visible from at least 500 feet away must be used on trucks hauling oversize loads, unless accompanied by escort vehicles.