A teenager riding his bicycle has died after he was struck by a vehicle in Big Beaver borough yesterday afternoon. The incident occurred around 3:30 p.m. in the 7600 block of Big Beaver Boulevard (Route 18) near Old Wampum Road. According to state police, Jordon Bobin was crossing Route 18 when he was struck by a vehicle headed north. State police say the teenager was transported to Ellwood City Hospital and then flown to UPMC Presbyterian, where he was later pronounced. Police say the driver of the vehicle was unhurt. The 17-year-old victim was about to graduate from high school.