Transport for NSW (TfNSW) required slope assessment undertaken of 13 slopes on the M1 Motorway between Sydney and Newcastle. Scope of works included the onsite data collection along with development of suitable 3D models and data transfer. Data collection was to be undertaken such that regular highway traffic was not impeded at all and was ultimately done at speeds between 80 ? 100 km/h.
AUAV proposed and consequently designed a multi-camera vehicle rig system to provide a photogrammetry based model for TfNSW slope assessors to review. The photographs from all four cameras were captured synchronously and linked to a GNSS location capture. The photographs were then compiled into a photogrammetric model suitable for interrogation by the Clients qualified Slope Risk Assessor.
The methodology used increased the availability of quality data. For example, changes in issues could be reviewed with greater confidence as numerous photographs and 3D model checks can be made.