Works are carried out within the danger zone, where (part of) the track is out of service, or for works at the tram premises. Isolating (part of) the electrical system is possible.

Terms for starting works under Regime C are:
- Work permit issued
- Entry license obtained
Log on and off at tram traffic control by controller of site safety
- Site protected with signals at a logical location ahead of the work site: stop signal at a minimum of 20 meters distance, caution signal at minimum of 40 meters distance ahead of the work site
- Rail vehicles can, by agreement, pass the work site within 15 minutes