A Newport News mother accused of leaving her 4-year-old son on the side of the Capital Beltway in Fairfax County and hitting him with her car as she drove off was ordered held without bond yesterday during a brief appearance in court.

Dressed in black shorts and a white T-shirt at her arraignment in Fairfax County's Juvenile and Domestic Relations Court, Channoah A. Green, 22, told Chief Judge Gayl B. Carr in a quiet voice that she was not employed and that she would need a court-appointed attorney. Green has been charged with felony child neglect and hit and run.

The boy, whose name has been withheld because of the criminal investigation, was found wandering on the shoulder of the interstate near the Lee Highway overpass by a motorist Tuesday night. The child gave authorities his name, age, phone number and mother's name and said that he had upset his mother because he was not sitting down in the car. He told police he had been bumped by the car when she drove away.

Green was arrested later that night after she was involved in a two-car collision on Interstate 95 north of Richmond. She was charged with reckless driving in that incident. While being treated at a nearby hospital, she told a state trooper that she had dropped off her child "up the road" from the crash site in Hanover County.

Police linked her with the boy found on the side of the Beltway. On Thursday, Green was transferred from the Hanover County jail to the Fairfax jail.

Police said that Green told them she had not slept in three days and was driving her 2002 Mitsubishi Lancer from New Jersey, where she and her son had been visiting the boy's father, to Newport News.

The preschooler was placed with Fairfax County Child Protective Services. Susan Alexander, program manager for the agency, said she could not comment on the specific case. But, she said, when a child is abandoned, authorities generally try to find relatives or someone who is close to the child to care for him for her.

Channoah A. Green told police that she had dropped off her child "up the road" from Hanover County, Va.