11.   A couple more steps and I would have been forced into a decision, a decision that was mercifully taken out of my hands when the light turned green.

12.   According to procedures, when that light turns on, the craft is required to land immediately, Shaw said.

13.   After the light turned green and they started forward, Sharon remembers a car running the red light and clipping a vehicle near them.

14.   But the light turned red while they were in the intersection.

15.   Flip switches off and on to see if the lights they control turn on.

16.   Gratefully, the light turned green at that moment, and we all sped away.

17.   If the light turns green, we proceed.

18.   If the light turns red, it means that there is something wrong with the relay and that a worker should not install it.

19.   If there are no likely matches, a light turns green and the person can proceed to the terminal.

20.   Issuing obscenities on the street is as automatic a behavior in San Francisco as hitting the accelerator when the light turns yellow.