Yes, it keeps them on the road.
That answer can never be answered because the number of cars on the road keeps growing.
The odometer
Deeper grooves improve traction for off road use but are noisy when on road use.
road
um... that's what road were made for... for cars to drive on. if you mean are cars aloud to drive anywhere else, no unless it's your property.
no because car c would crash into it
aprroximately 120,000 Cars were on the road in 1906 due to the records kept by the Car companies.
Momentum
crash
Tires or the road.
A busy road with many cars means traffic i would think that is the best awnser