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

She had expected him to return, telling her that the signal wouldn't work, or that the attempt was in vain.

The Culture must know; the Mind was certain its signal had worked and that it would be picked up somewhere.

The major difference is that British signals do not work on the principle of speed signalling.

The signals telling trains to stop or proceed may not have been working properly because of the work being done on them, officials said.

To help explain how these signals work, we should define some terms.

Of course, the signal wouldn't work if no one was looking.

The signal wasn't working, and he had yet to meet anyone else on the road.

With the jumper cable, the signal worked correctly until a second wire broke.

Other tasks included manning fixed coast watch stations and signals work.