19 to green; 17 to red; 20 to green

Note the timers on the traffic signals. All the traffic lights had these large count-down timers to tell drivers how many seconds remained until the light changed.

This photo was taken at about noon on a "sunny" day according to Weather.com. It was not raining, just the usual smoggy air...it always looked like concrete dust and smelled like a combination of mildew and diesel exhaust.