Proving Ground - Straight Line Wet Grip

Testing on the wet grip basalt surface.


  • Tyre tread pattern and compound development
  • Braking systems (ABS)
  • Traction control (ASR)
  • Aquaplaning
  • Vehicle appraisal and demonstration
  • Driver training
  • Type approval
  • Glass plate photography

Facility Description

  • 800m approach road
  • Six noise-generating areas
  • Six braking surfaces of varying friction levels from 0.10 to 0.75 nominal
  • Braking surfaces contained within 200m length
  • Ability to carry out split-µ tests
  • Variable-level aquaplaning trough

Test Surface Details
Surface Length & Width Typical µ (wet) Watering
Smooth Concrete 100m x 4m 0.40 Spray & Weir
Bridport (with Quartzite) 100m x 4m 0.40 Spray & Weir
Sand Asphalt - 2 Lanes 100m x 4m 0.40 Spray & Weir
Smooth Asphalt 100m x 4m 0.75 Spray
Basalt Tiles 200m x 7m 0.30 Spray
Ceramic Tiles 100m x 3m 0.10 Spray
Aquaplaning (smooth concrete) 66m x 4m   Spray & Direct