Adapted for version 1.6 ATS and gathered in one fashion:
Separate state Highway Patrol cars (upd. 14.02.17)
Authors: Keeper & gabenz88
Ambulance and fire truck traffic v1.1 (upd. 14.03.16)
Authors: SCS, Solaris36.
The mod adds in traffic in an ambulance and a fire truck with working special signals (flashing lights and sound)
The police on duty
Author: Todor Alin.
Mod adds to the traffic police car with constantly included special signals
Test version 1.6.1.7