Warrants for the use of PTCDs are found in Section 5.10.1 of the QGTTM Part 3.Any decisions not to use PTCDs in these situations, will need to be supported by a risk assessment (the risk assessment must address why it is considered that the use of a Traffic Controller with a STOP / SLOW bat is safer than using a PTCD at that site and the measures that will be implemented to reduce the potential risks to the Traffic Controller).