Pete Piringer, a county fire and rescue spokesman, says initial reports indicate that a car traveling south on the interstate crossed the median, struck a flatbed truck and caught fire.
Piringer says the truck driver and other motorists stopped and pulled a women from the burning car.
He says she had life-threatening injuries and was taken to a local hospital.
Piringer says the truck driver suffered no serious injuries.
The accident occurred about 1:15 p.m. All northbound lanes were closed, but the accident is now cleared and all lanes are open.
Maryland State Police are conducting an accident investigation.
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(Copyright 2006 by The Associated Press. All Rights Reserved.)