CONRAIL CREWS had reports of signal problems at a Paulsboro, N.J., railroad bridge weeks before a train derailment Friday and were studying the problem the day before the crash and resulting chemical leak, federal investigators said Sunday.
Seventy people went to a hospital following the derailment. More than 100 people are expected to remain out of their homes this week while crews try to remove the hazardous material, vinyl chloride, from a ruptured tanker.
The National Transportation Safety Board cannot examine the scene until the chemicals are removed. But the agency this weekend began reviewing records with a focus on both the signal problems reported recently and a 2009 train derailment on the same bridge.