Around here we have a wide variety. Sometimes they do nothing. Sometimes they don't change the main traffic pattern at all, but won't ever display "walk" unle

Around here we have a wide variety. Sometimes they do nothing. Sometimes they don't change the main traffic pattern at all, but won't ever display "walk" unless you press them. Sometimes they change the traffic pattern. Sometimes behavior changes at different times of day. Sometimes they're legit broken - at one intersection, a button I used only worked maybe 30% of the time, unless you were holding it down at the exact moment the cycle changed, then it worked 100% of the time.