Hill Descent Monitoring (HDM) Scheme
Required for AB-triples with tri-axle groups operating at CML on Roelands Hill
The Roelands Hill scheme is also administered by Main Roads Western Australia (MRWA) to monitor:
- the estimated speed of Category 7 (A) AB-Triples operating under permit on part of the MRWA road network, namely Roelands Hill (the permit to operate is related to this section of road only; any other permits that vehicles operate under will be considered separately)
- whether enrolled vehicles stop for a sufficient period before descending Roelands Hill
- whether enrolled vehicles exceed the 40 km/h speed limit when descending Roelands Hill.