Maryland State Police, Hagerstown City Police and the Washington County Sheriff's Department said traffic went smoothly over the weekend.
"There weren't any significant problems," said State Police Cpl. J.R. Pyles. "We had a heavy police presence in an effort to be proactive rather than reactive."
More than 30,000 people gathered at the Antietam National Battlefield in Sharpsburg on Saturday for its annual concert and fireworks display, according to sheriff's Deputy Joseph Keller, who helped direct traffic.
The flow of vehicles was heavy but orderly, he said.
"It went quite well," he said. Maryland State Police also helped out at the event.
Keller, who was stationed at Lappans Crossroads, said traffic took about two hours to disperse at that site after the fireworks ended.
Congestion on Franklin County, Pa., roads ranged from moderate to heavy at various times over the weekend, according to the Pennsylvania State Police at Chambersburg. That agency reported five traffic accidents between Friday and midday Sunday.
On Saturday, a Port Royal, Pa., man was cited for driving under the influence after losing control of his car on Pa. 997, state police said.
William Harlon III, 19, was driving north about 4 p.m. when his car traveled off the east side of the road, hit an embankment and overturned, police said.
Police said the driver failed sobriety tests and was taken to Chambersburg Hospital, where tests indicated a blood-alcohol content in excess of the legal limit.
Harlon's passenger was taken to Chambersburg Hospital with injuries to his hands. He was discharged Saturday, a hospital supervisor said.
A Chambersburg man was cited after a two-vehicle accident on the Anthony Highway in Guilford Township, Pa., Saturday morning, police said.
Joshua M. Pisle, 19, of 3111 Anthony Highway, was driving south on Pa. 997 when he made a left turn across the highway, colliding with a 1988 Jeep Cherokee, police said.
Pisle was cited for an illegal turn, police said.
The Jeep, driven by Douglas Hinkle, 3419 Anthony Highway, Chambersburg, hit the passenger side of Pisle's 1986 GMC Jimmy, police said.
Both cars stopped in the grass on the east berm in the 7:33 a.m. accident.
Ryan D. Hinkle, 13, 3419 Anthony Highway, Chambersburg, who was riding in the Jeep, received minor injuries, police said.
A two-car accident on Pa. 30 at Hawbaker Drive in Franklin County, Pa., damaged two cars Saturday evening, police said.
Police said vehicles driven by William E. Harnish, of 14144 Fairview Road, Clear Spring, and
Robert Zemanski, of 7929 Main St., Bedford, Pa., collided at 5:40 p.m.
There were no injuries.
Harnish's 1990 Ford F-150 pickup truck and Zemanski's 1987 Ford Escort sedan were towed from the scene.
A damaged oil and grease seal on a 1995 tractor trailer caught fire on Pa. 16 on Saturday afternoon.
Robert Dulac, 42, of Brandenburg, Ky., was uninjured in the 1:15 p.m. accident.
The fire was extinguished without damage to the truck's cargo, state police said.
In another Franklin County accident, a Chambersburg man was charged Sunday with careless driving after a crash on Crottlestown Road. Police said the driver fell asleep and his car left the north berm, hitting a concrete bridge.
Michael A. Sweger, 22, 3836 Letterkenny Road, Chambersburg, was uninjured in the 12:40 a.m. accident, police said.
A passenger, Jason Michael Belluscio, 68 S. Federal St., Chambersburg, received minor injuries, police said.