One man was killed and three other persons including a fireman, were injured early yesterday when a tractor trailer collided with a parked car and exploded in flames on the Capital Beltway near Rte. 214 in Large, Maryland state, police reported.

Police said the accident occurred when the tractor trailer plowed into the rear of a 127 Bers Electra owned by R. D. Person, 38, of Jersey City, N.D. According to police, person had parked his car on the shoulder of the road next to the right hand lane with the car putting three feet into the lane.

The tractor-trailer jacknifed after the collision skidded 106 feet down the [WORDS ILLEGIBLE] an embankment and then explode into flames, police said.

The truck's passenger, Cleon Allison, of Jamaica, N.Y., managed to escape with minor injuries, but the driver, was trapped and burned to death, police said.

The driver's name was withheld until next-of-kin could be notified.

Firemen fought the blaze for nearly an hour and police were forced to close the Beltway to all southbound traffic for more than four hours, creating a three-mile traffic backup. It was not until 1 p.m. that all four lanes were reopened.

A Prince George's County volunteer fireman, William Cayhill, 23, of the Kentland Fire Dept., was taken to Prince George's General Hospital where he was treated for first degree burns to his hands and face, according to fire officials.

Person's wife, Eula, 32, was also treated there for minor injuries, police said. Person was not in the car at the time of accident. Police said he had gotten out to "stretch his legs." He was charged with stopping in the travel portion of a highway and released.

In a unrelated accident, a Falls Church man, Steven William, 18, was killed Friday night in a two-car accident on the Rte. 50, three miles east of Cambridge, Md.

William was killed when his car crashed into the rear of a tractor-trailer while the tractor-trailer was trying to make a left turn. His passenger, Greg Dunn, 20, also of Falls Church was in fair condition yesterday at Dorchester General Hospital.