I Figured That's What They Were There For

Here's What Those Bumps In The Sidewalk Are For

The next time you walk down a sidewalk and come to a street crossing, you may notice some strange bumps and patterns in the concrete. I always thought these were for water drainage or extra traction. I was wrong! The real reason is much more complex and fascinating.

In short, it’s to help people with disabilities get around a little easier.

(Jalopnik.com)