Road Material Distribution: Why Does Sand and Gravel Collect on the Sides of Two-Lane Roads?

Where are sand and gravel most likely to collect on a paved two-lane road?

A. Near the center of the road

B. Near the sides of the road

C. In the left wheel track

Answer:

Sand and gravel typically collect on the sides of paved two-lane roads.

On a paved two-lane road, sand and gravel are most likely to collect near the sides of the road. This is due to natural processes and the design of the road. Because roads are usually slightly elevated in the center for drainage purposes, loose sand, gravel, and other debris tend to move towards the sides of the road when it rains or when vehicles drive by.

Additionally, sand and gravel can be transported by wind and kept in place by the vegetation or barriers often found at the sides of the road. Over time, this leads to the accumulation of loose material near the sides of the road.

In the context of driving, it's important to be aware of this phenomenon, especially when changing lanes or pulling off the road, as the loose sand and gravel can affect traction and vehicle control.

Understanding why sand and gravel collect on the sides of two-lane roads can help drivers anticipate road conditions and drive more safely. Stay informed and drive cautiously!