A 24-year-old Alexandria man caused two accidents Wednesday night as he drove east in the westbound lanes of I-66, police said yesterday.

The driver, Steven D. Hill, was listed in serious condition yesterday at the intensive care unit of Arlington Hospital. Hill caused the driver of one car to crash into the median strip to avoid his car and then hit another car head on, Arlington police spokesman Tom Bell said.

Robert Hill, Steven's father, said yesterday he did not know his son was upset when he left his home at 2706 Mosby St. However, he said Steven has been hospitalized about nine times in the last several years because of emotional stress.

"He had just left home, but didn't say where he was going," said Robert Hill. "I feel bad about it. I hate what happened and how it happened. I feel bad about the girl who was hurt."

Police said the first accident occurred when 27-year-old Dawneen Payne of Arlington, in an attempt to avoid Hill's car, swerved and smashed her car into a concrete median wall near the Glebe Road exit. Payne was not injured, according to Arlington police.

Hill continued driving toward Washington and about a quarter-mile further along collided with a car driven by Daria Gacki, 19, of New Jersey. Gacki was taken to Arlington Hospital, where she was listed in fair condition yesterday.

Bell said traffic "was tied up for some time" after the accidents, which occurred about 7:30 p.m. Traffic at that time is usually moderate, he added. Bell said Hill was driving at a "high rate of speed." Hill was charged yesterday with reckless driving and hit and run, Bell said.

Police were unable to say whether any of those involved in the accidents was wearing a seat belt.