If you see a concrete wall with several drain holes through it on the side of a roadway, what is its purpose?
A) To collect rocks from rock falls
B) Support the base of the slope
C) Provide extra weight on the slope
D) Cushion the slope from potential collisions with cars

Question

Quizplus · Accepted Answer

The purpose of a concrete wall with several drain holes through it on the side of a roadway is to support the base of the slope. The drain holes allow any water to pass through the wall instead of buildup behind it, which can cause erosion and instability in the slope.

If You See a Concrete Wall with Several Drain Holes