Newpave Asphalt

Pavement Testing

Road Roughness Surveys ( Naasra / Iri Testing ) - Laser Profilometer

New construction, area wide treatments as well as rehabilitation programmes typically require a roughness (NAASRA) measurement, post-sealing. This is to ensure that the pavement surface complies with contract specification, providing a smooth ride.

Our ROMDAS Roughness Profiler is designed for this purpose which consists of two-point lasers, positioned over the wheel paths. These lasers provide either left, right or both wheel path and lane IRI as well as NAASRA Count and raw longitudinal road profile data


Post-construction road roughness surveys
Network level surveys
Routine surveying for maintenance planning
Generally, whenever high accuracy roughness data is require


Measure high accuracy roughness (IRI) and NAASRA (can be customised to any interval over 1m)
High accuracy odometer
3 axis accelerometers
Easily coupled to include sub meter GPS accuracy, Video Logging and Transverse Profiler (rutting)
Single or dual wheel path configurations available
No need for expensive and dangerous traffic management when surveying at traffic speeds

Why Test?

At the Australian road safety research conference in 2012, an investigation into the benefits of road smoothing found a range of key findings. These include:

Road roughness has an increased negative impact on the risk of crashes, as the horizontal curvature increases .
Roughness had the greatest impact around corners at the apex of the curve.
Smoothing low volume rural roads is cost effective (for safety) when an existing injury crash density exceeds 0.5 reported injury crashes per year per km for straights and 1.8 for moderate curves.