Highway pavement and Rolling Resistance

Introduction:
Rolling resistance is the force that opposes the motion of a vehicle's wheels. It is the force that must be overcome to move a vehicle along a road surface. Rolling resistance is a crucial factor to consider when designing highway pavement.

Answer:
The surface of highway pavement should be designed to allow "no rolling resistance." This means that the pavement should be designed to minimize rolling resistance as much as possible.

Reasons:

1. Fuel Efficiency:
Rolling resistance affects fuel efficiency. The higher the rolling resistance, the more energy is required to move a vehicle along a road surface. This means that a vehicle with high rolling resistance will require more fuel to travel the same distance as a vehicle with low rolling resistance.

2. Safety:
High rolling resistance can reduce the safety of a road surface. When a vehicle's wheels encounter high rolling resistance, it can cause the wheels to skid or slip. This can reduce the driver's ability to control the vehicle, increasing the risk of an accident.

3. Maintenance Cost:
High rolling resistance can also increase the maintenance cost of a road surface. When a road surface has high rolling resistance, it can cause the tires to wear out faster. This means that the road surface will need to be repaired or resurfaced more frequently, increasing maintenance costs.

Conclusion:
In conclusion, the surface of highway pavement should be designed to minimize rolling resistance. This will improve fuel efficiency, safety, and reduce maintenance costs.