1.   A bridge operator in a small shack electrically operates the bridge and its red and green signal lights.

2.   But the signal lights stayed yellow.

3.   By tampering with signal lights, the robbers halted a night mail train at an isolated spot in Buckinghamshire in southern England.

4.   GPS-guided signal lights are already built into many new tractors and manure spreaders.

5.   Its members were running trains over tracks, stopping, starting and stopping, as they measured distances and monitored signal lights.

6.   Not risking life and limb by daring signal lights is viewed as sissified and wimpish.

7.   Out front, authentic signal lights flash green by the wrought iron swings where passengers from the cross-country Greyhound nurse their caffeine.

8.   Some residents said the crossing at Liberty Church Road, which has no signal lights or mechanical crossing arms, was a tragedy waiting to happen.

9.   Intersections in Sacramento were jammed Monday as signal lights went dark.

10.   Signal lights went dark, rush-hour traffic jammed and police officers were dispatched to control intersections.