about 10 sec
Okay, you're talking about the delay when the light turns red for one direction and then turns green for another direction. My guess would be that it would be to ensure that the intersection is clear before another direction of travel is given the green.
They are four different bands of light.
The duration of After Four is 1800.0 seconds.
The duration of Four Sons is 1.67 hours.
The duration of My Four Children is 3180.0 seconds.
The duration of Four in a Jeep is 1.58 hours.
The duration of Four on the Floor is 1560.0 seconds.
The duration of Four Daughters is 1.5 hours.
The duration of Four Rooms is 1.7 hours.
The duration of Four's a Crowd is 1.53 hours.
The duration of Four of the Apocalypse is 1.73 hours.