A Rational Theory of Tire-Pavement Friction

Table 6

Summary of friction test results from the four tests reporting values of their associated sliding friction index.

#	Pavement type	Test condition	, lbf	Sliding friction index
1	Asphalt	Dry	140	0.60
2	Asphalt	Wet	220	0.60
3	Concrete	Dry	200	0.58
4	Concrete	Wet	60	0.58