A woman was killed early Monday when she was struck by two vehicles on the northbound service road of Interstate 35W near Seminary Drive, police said.The incident was reported at about 6 a.m., said Sgt. Rodney Bangs, supervisor of the Traffic Investigation Unit.The 54-year-old woman, whose name was unavailable at 8:15 a.m., may have walking to get roadside assistance for a stranded vehicle, Bangs said in an e-mail."She was struck by a delivery van driver who stated that he did not see her in the roadway," Bangs said.The woman was hit a second time by a Dodge pickup truck that was following behind the delivery van, Bangs said. She was pronounced dead at the scene, he added.Police declined to release her name because her family was not yet notified, but a vehicle that was registered to her was found nearby, Bangs said."Investigators believe that she may have been walking to seek help due to her vehicle breaking down," Bangs said. "Due to the circumstances criminal charges are not anticipated."