2.6Equipment installation#
2.6.1Safety considerations#
Only a nominated trained and competent Traffic Controller may operate PTSS in manual mode.
It is the responsibility of the Traffic Management Designer to determine the location, operation mode and operation parameters of the PTSS. Operation parameters (including any on site changes) shall be documented for record keeping purposes.
PTSS shall only be operated when all safety, operation and service instructions contained in the manufacturer's manuals are understood by the operator. Operators shall understand and comply with the manufacturer's instructions accompanying each PTSS (this supplement does not replace the field service manual and instructions accompanying each set of equipment).
PTSUs shall be located a safe distance from the traffic path, which would generally be not more than one metre from the travelled path; however, this may need to be increased in particular circumstances so that wide loads or turning vehicles will not impact the unit. PTSUs shall not be located within the taper and shall be installed so that their signal lanterns are approximately vertical (± 5 degrees).
The location of PTSUs should also consider the impact of work vehicles and plant (including the impact of vehicle mounted warning devices and other lights at night) on the visibility of the signals, especially when they are located or parked in the background.
For unattended operation, weather conditions shall be monitored to ensure they do not exceed manufacturer’s specifications (for example, wind speed).
PTSS using wireless communications are not to be used near blasting activities.
For shuttle control, the maximum operating distance should be based on the requirements in QGTTM.
The lantern faces, the vehicle detectors and solar panels (if used) shall be kept clean. PTSS batteries shall be fully charged before operating the unit.
2.6.2Lanterns#
Portable traffic signal lanterns shall be clearly visible to approaching traffic stopped behind the stop line or the STOP HERE ON RED SIGNAL sign.
Additional signal lanterns may be used on an approach, if appropriate for traffic or site conditions. A second signal lantern used on an approach provides redundancy – for example, one lantern may fail, or signals may be knocked or turned so that the signals are no longer facing traffic.
Before operating a PTSS, the visibility of each PTSU shall be assessed. To ensure visibility, these factors should be considered:
- deep shade
- the direction of the sunlight, and
- background conditions.
A PTSS with a target board may be required if visibility is compromised based on this assessment.