Why do sidewalks have blocks, instead of being solid?

Question

Why do sidewalks have blocks, instead of being solid?

In: 205

Answer 1

Because using pre made tiles and blocks is much easier and cheaper than bringing a cement truck to pour out a massive single piece of concrete to make a sidewalk, especially considering that sidewalks often have to follow the curvature of the road or the ground. Also there’s many utilities underneath sidewalks, like power lines and water drains, which need access points. You can have access points much more easily if you haven’t poured solid concrete over everything.