Periodic and ultra-precise monitoring of road conditions provides infrastructure operators with essential data for making decisions, which are needed for targeted and cost-effective maintenance planning. The AIT owns two mobile high-performance laboratories, called RoadSTARs, which are equipped with the very latest in sensor, positioning and camera technology, allowing key road surface characteristics and road layout parameters to be documented and evaluated in line with the highest standards of quality and precision. Measurements of all parameters are taken in a single run without compromising traffic flow at a standard measuring speed of 60 km/h.

Road conditions

  • High-quality, realistic skid resistance measurements in different braking conditions (blocked wheel, ABS, slip ratio of 18%, 25%, 50% and 75%)
  • Transverse evenness: rut depth, theoretical water depth in ruts covering a width of 3.30 m and a vehicle width of just 2.50 m
  • Longitudinal evenness: true elevation profile and calculation of different indices (IRI, PSD, LWI, wLP, etc.)
  • Macrotexture: Mean profile depth (MPD), estimated texture depth
  • Surface distress (potholes, fretting, etc.) and cracks from a width of 1 mm based on video footage independent of ambient light / shadow covering a width of 4 m

Road layout parameters

  • Curve radii and curvature
  • Crossfall
  • Slope

Road environment

  • Ultra-precise positioning of objects in road environment (route markers, road signs, road markings, etc.)
  • Ultra-precise 3D stereo imaging of objects in road environment (lane width, headroom, height of noise barriers, etc.)