Some are fast. In a place I used to live there was an very low traffic intersection on a road between my office and my home where the light was misprogrammed o

Some are fast. In a place I used to live there was an very low traffic intersection on a road between my office and my home where the light was misprogrammed or had a bad trigger and would consistently take many minutes before switching to one direction (the direction between my home and office). But hitting the crosswalk to cross the perpendicular road would make it turn green (and the always-green direction red) in seconds. I believe the button instantly set the light to yellow, so the only delay was the yellow time. So if my partner was with me she'd always hop out and hit the button. :P Of course, perhaps discouraging that behavior is a reason they aren't usually fast like that. :)