Why do bridges have expansion joints?
A)They would buckle and crack otherwise.
B)to let water run off
C)to absorb vibrations due to traffic
D)for ease in construction

Question

Quizplus · Accepted Answer

Bridges undergo thermal expansion and contraction due to changes in temperature. If there were no expansion joints, the bridge would buckle and crack due to the forces resulting from this expansion and contraction. Expansion joints allow the bridge to expand and contract without causing damage. While choices B, C, and D may also be true to some extent, they do not directly address the primary purpose of expansion joints on bridges.

Why Do Bridges Have Expansion Joints