If an object just about to slide down from an incline plane (increase the angle slowly),
then the value for that angle will be the static friction between that object and the incline plane.
So normally, the value is between 0-1.
Friction coefficient of tires on the road : initial value is 0.8
Typical value of tires static coefficient kinetic coefficient
auto tires on dry concrete 1.0 0.7-0.8
auto tires on wet concrete 0.7 0.5
auto tires on icyconcrete 0.3 0.02