The U.S. National Transportation Safety Board has released a preliminary report into last month's accident involving a Bulk Carriers' transport truck from P.E.I.

In the report, the NTSB said the driver of the truck was distracted by sounds and lights behind him and was looking in his driver-side mirror just before the crash. The NTSB said when the driver looked forward again, he saw traffic was stopped.

The report outlines how 24-year-old Morgan Lake's car plunged eight metres off the Bay Bridge into Chesapeake Bay after it was hit by the truck.

Lake managed to escape the sinking car and swam to a bridge pier. She suffered minor injuries. There were no other injuries in the accident, according to the NTSB.

The NTSB said the 29-year-old truck driver tried to avoid the crash by moving his vehicle to the left, into a lane travelling in the same direction, but wasn't successful.

The report goes on to say the driver had only been working for Bulk Carriers for three months and was on his first solo run to the United States without a more experienced driver accommpanying him.

This is just a preliminary report. No charges have been laid.

The NTSB said the investigation is continuing and more information may be added or changed to the findings.

Bulk Carriers has declined to comment until the investigation is complete.