A 70-year-old woman traveling to a family gathering in Ocean City was among five people killed in traffic accidents in Maryland over the weekend. Dorothy Dixon, 70, of Camp Springs, was killed yesterday after a car crossed the center line of Md. 32 in Clarksville and struck the mini-van in which she was riding, Howard County police said. The woman was pronounced dead at the Shock-Trauma Unit in Baltimore. The accident occurred about a mile north of Md. 108 when a northbound Toyota Corolla driven by James Hanley Dorrance, 35, of the 13000 block of Old National Pike in Mount Airy, crossed the center line of Md. 32 and struck the southbound Dodge Caravan about 4:20 p.m., Howard County police said. Dorrance was pronounced dead at the scene, police said. Dixon's daughter, Deborah Greene, 33, of the 7000 block of Limestone Lane in Middletown, who was driving the van, and Greene's children, Christopher, 6, and Jimmy, 9 months, were injured, police said. All were listed yesterday in stable condition at Johns Hopkins Hospital. Police said the accident was under investigation. A Calvert County woman died after she was thrown from a motorcycle that was struck by a car that ran a stop sign in St. Leonard yesterday, State Police said. Olie Mae Trexler, 36, of St. Leonard, was pronounced dead at Prince George's General Hospital at 6:17 p.m. yesterday. She was a passenger on a motorcycle that was southbound on Md. 235 about 5 p.m. and was struck by a van on eastbound Md. 247 that failed to stop at the intersection, police said. Ervin E. Trexler, 46, of St. Leonard, the operator of the motorcycle, was listed yesterday in stable condition at the hospital, police said. The relationship of the Trexlers was not immediately known. Pending the outcome of an investigation, no charges have been filed against the driver of the van, Burton B. Raley of Lexington Park in St. Mary's County, police said. A 27-year-old Georgia man was killed after he lost control of his car about 4:53 a.m. yesterday in the 6300 block of Windsor Mill Road, Baltimore County police said. Van Porter of Norcross, Ga., was westbound at a high rate of speed when he lost control of the car, which swerved off the left side of the road, struck a curb and several other fixed objects, flipped over and slid into an eastbound 1990 Plymouth, police said. Porter, who was thrown part way out of the car by the impact, was killed instantly, police said. In Baltimore, John Vereen, 50, of the 1400 block of Wilmer Court, was killed when he was run over by a car while lying in the middle of Pennsylvania Avenue on Saturday, police said. No charges have been filed against the driver.