When standing at a crosswalk, you might press the button to cross and wonder if that button actually does anything. As it turns out, it's complicated.
The Family Handyman on MSN

Do Crosswalk Buttons Really Do Anything?

Crosswalk buttons are a common sight at intersections, but does pushing them actually do anything to speed up the light cycle ...
The audio enhancement feature at public crosswalks is normally meant to assist the visually impaired by providing ...
At some point, almost everyone has stood at a crosswalk, pressed the button once, decided it didn't register, and pressed it six more times in rapid succession. This is a remarkably universal human ...