Question

Grade elevation refers to

A. Using bridges and tunnels to direct traffic over and under other travel lanes
B. Giving extra credit in driver's education classes
C. Adding gravel to the shoulders of roads
D. Raising the suspension of a vehicle

Answer 1

Grade elevation refers to raising the suspension of a vehicle.

Step-by-step explanation:

Elevation refers to moving an object to a greater height without acceleration. In the context of roads, grade elevation is the process of raising the height of a road or a section of a road. This can be done to improve drainage, increase the clearance for tunnels, or provide better visibility for drivers. Hence, the correct answer is (D) Raising the suspension of a vehicle.