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Sideway-force Coefficient Routine Investigation Machine (Briefing)

The majority of surface dressing being carried out across Devon is due to the failing of

skid resistance which has been identified through SCRIM® ..... So what does that mean?:-

  1. Purpose:

  • The SCRIM® road survey helps measure the wet skidding resistance of a road surface. By assessing skid resistance, authorities can take proactive measures to reduce accident rates.

  • Skid resistance is particularly crucial during damp or wet conditions, as it affects vehicle traction and braking performance.

  1. Measurement Principle:

  • The SCRIM® machine uses the sideway force principle to measure skid resistance.

  • Here’s how it works:

  • A freely rotating wheel with a smooth rubber tire is mounted mid-machine in line with the nearside wheel track of the vehicle.

  • The wheel is angled at 20° to the direction of travel.

  • A controlled flow of water wets the road surface immediately in front of the test wheel.

  • As the vehicle moves forward, the test wheel slides along the surface, measuring the frictional forces.

  • The resulting data provides insights into the road’s skid resistance.

  1. Data Analysis and Reporting:

  1. PTS and SCRIM®:

In summary, SCRIM® plays a vital role in maintaining road safety by assessing skid resistance and informing maintenance decisions. 

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