We roleplay as Emergency Services in Canada, And America, Maybe Europe, Probably Not. Here are the codes.

Codes

Code 1: Casual Response
Code 2: Lights, Sirens and heavy traffic and intersections.
Code 3: Lights, Sirens
Code 4: Clear
Code 10: Roll TRU

10-7: Out of Service
10-8 In Service
10-10 Off Duty
10-19 En Route
10-20 Location
10-23 Stand By
10-57V Runner
10-57F Foot Pursuit
10-97 On Scene
11-44 Roll Coroner
11-80 Explosion
11-85 Tow Truck
11-99 Officer Needs Assistance