Roadway friction tester and method

Details Roadway friction tester and method Roadway friction tester and method

2005-01-11

2005-01-11

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Tire, tread or roadway

C073S009000

Reexamination Certificate

active

06840098

ABSTRACT:
A method for measuring road surface friction of a road surface uses a vehicle that moves across the road surface. An auxiliary independent wheel is interposed between the vehicle and the road surface. The auxiliary wheel is freely rotatable by movement of the vehicle and is toed in (skewed) with respect to a direction of travel of the vehicle so as to create an axial force on the auxiliary wheel. The axial force on the auxiliary wheel is isolated and measured while the vehicle moves across the road surface. The measured axial force is correlated with the road surface friction.

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