Beyond the farther end of the bridge, the red signal changed to green.

All of them were recorded to have passed red signals.

The red alert signals went out entirely this time, and did not light up again.

A whistle would sound if the red signal came on.

"We got the red signal one night when I was on duty," he added.

Across the hall, he caught another glimmer of the red signal.

The first train had been stationary waiting for a red signal.

The train had stopped before a red signal which blocked the way.

Then his warning board flashed a red signal at him.

And now the red signal tells us that he finally woke up again.