Hazmat derailment near Philadelphia

[ngauger]

Standard operating procedure. If the dispatcher can't get the signal to line up the crew can be talked by after a visual inspection.

OK - I thought that was the reason.

But wow - What a result. If the signal is saying something is wrong and it turns out the signal is correct (something "was" wrong with the bridge) that's a shame for the crew. I'm glad it wasn't the engines that went into the creek.