The probable cause of a crash that pushed a young woman's car off the Chesapeake Bay Bridge was the failure to slow for traffic due to inattention by the P.E.I. driver of a transport truck, the U.S. National Transportation Safety Board has concluded.

The accident happened in July. The report highlights that the truck driver was looking in his side view mirror just before the crash, and also says his unfamiliarity with the area and lack of knowledge that traffic usually slows after exiting the toll plaza, heading into a lefthand curve, also probably contributed.

Morgan Lake's car fell eight metres into the water when it was struck by the truck. She escaped the sinking vehicle with minor injuries.                

The report says if the section of the bridge where the accident occurred is redone the barriers will be upgraded. In the short-term, new warning signs and digital speed readouts are being added to the bridge.