A Waldorf woman who was critically injured in a collision with a Charles County sheriff's corporal in Hughesville appeared to be recovering, authorities said.

Julie H. Whiston, 29, was seriously injured Wednesday morning when she drove her Dodge Intrepid across the northbound lanes of Route 5 at Gallant Green Road, said Kristen Adkins, spokeswoman for the Charles County Sheriff's Office.

At 8:49 a.m., after stopping at a stop sign, Whiston pulled into the path of a northbound police cruiser driven by Cpl. Robert Kuhnow, 32, Adkins said.

After the collision, Whiston was flown to the Maryland Shock Trauma Center in Baltimore in critical condition. Kuhnow, who has been with the sheriff's office since 1996, was flown to Prince George's Hospital Center. He was released and is in good condition, Adkins said. As of Friday, Whiston's condition was stable, Adkins said.

The accident took place on a narrow and often crowded stretch of the highway long considered dangerous by Charles County commuters and law enforcement agencies. The Hughesville bypass, a $52.6 million project scheduled to open in summer 2007, is expected to alleviate congestion along this roadway.

When finished, the bypass will run east of Route 5 from Nubian Place across Route 231 and connect back with Route 5 at Herbert Road, said David Buck, spokesman for the State Highway Administration. From just north of Gallant Green Road south to Deborah Drive, Route 5 will be widened to include a 35-foot median and 10-foot wide shoulders, Buck said. A modified T-intersection will be built at Gallant Green Road with protected left-turn lanes for cars turning onto Route 5.