1Background#

When electrical supply to traffic signals is disrupted either due to unplanned outage or planned electrical works by Transport and Main Roads or the power supply authority, the road environment must remain safe. Consequently, maintenance crews must implement measures to ensure a safe environment for all road users.

In the event of planned outages affecting traffic signals, it is the responsibility of the proponent who is disrupting the power supply to liaise with the relevant departmental district office so that the appropriate option for traffic control is applied. The options available include:

1. a)implementing manual traffic control
2. b)installing a portable traffic signal, or
3. c)energizing the existing signals via an alternative source.

This manual prescribes minimum installation requirements when the third option is deemed the most viable. The department has identified transportable generators as a viable alternative source of supply to traffic signals in the event of mains power disruptions.

The selection of the appropriate generator to be used in traffic signal installations shall be in accordance with MRTS259 Transportable Generator.