If thousands of cars drive on the interstates (US) daily, how does the road not wear down so fast?

Question

Unsure of the proper flair, so engineering it is.

In: Engineering

Answer 1

Also, I haven’t seen anyone else mention the fact that the road wear caused by Passenger Vehicles is almost entirely negligible.

Semi-Trucks and larger vehicles cause ~95% of the road wear even though they only make up roughly 10% of the traffic.