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VIRGINIABEACH--The medical examiner said a woman who died after her car went off the Chesapeake Bay Bridge-Tunnel on Tuesday died from drowning with blunt force contributing.

The police investigation is continuing, however, into the death of Jean Calcagno.

Police say her body was recovered from her 2007 Toyota Avalon around 5:40 p.m. Tuesday.

The Coast Guard initially said they believed two people were in the vehicle when it ran off of the bridge-tunnel Tuesday morning near the 8-mile post. However, there is currently no indication that there was more than one person in the vehicle.

The Coast Guard, Va. Beach Police's dive team and Marine patrol, a fire boat from Va. Beach Fire and Rescue and the tunnel's inspection team searched for the vehicle all day, Lt. Mike Patterson with the Coast Guard told WVEC.com.

CBBTspokeswoman Debbie Cooley told WVEC.com the vehicle went off the southbound span around 8:20 a.m., forcing crews to close the southbound lanes until about 10:15 a.m. Northbound traffic was never affected, she noted.

Patterson said that the Coast Guard crews from Station Cape Charles and an HH-60 Jayhawk from Air Station Elizabeth City were involved in the search.

Six Virginia Marine Police officers on three boats helped in the search and rescue as well, said spokesman John Bull.

Crofton Corporation divers found the vehicle on the third dive.

It's unclear what caused the vehicle to go off the span. Investigators don't think she was speeding.

'No skid marks or indication the individual hit their brakes,' said Chief Edward Spencer, ofCBBT police.

It is unknown what caused Calcagno to make an abrupt lane change that turned fatal.

'It wasn't any defect with the facility that caused this,' said Spencer.

CBBTcouldn't say how much speed the guard rail could withstand. VDOT said their rails are built according to Federal standards.

Chief Spencer said one factor could be that the car hit the curb before it went through the guard rail.

'I think we're a very safe facility and some things you can't prevent,' he said.

Associated Press contributed to this report.

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