1.   A British Rail spokesman said they had an eye-witness who confirmed the warning signals were working properly.

2.   And after a quick review showed that the signals were working properly, some speculated that Darden had gone through a red light.

3.   And, did the yellow signal itself work properly?

4.   The officials said they had not determined whether the signals were working at the time of the crash.

5.   For example, an image signal or data signal can be sent through a line on which a voice signal is also working.

6.   He said a preliminary investigation showed no signs that the brakes had been applied and found the track signals had worked properly.

7.   Switching and stop-and-go signals were working properly, railways officials said.

8.   They claimed the crew members lost their bearings in heavy fog and collided with a second train because the signal was not working.