A Recent Central Bucks West High School graduate has died of injuries suffered early Saturday morning on the Pennsylvania Turnpike in King of Prussia. State Police say 18-year-old Michaela Petro of New Britain Township and 18-year-old Jeffrey Lacey of Lansdale were standing outside their car after it ran into a concrete barrier when a tractor-trailer struck the car, which in turn struck them.  Petro was a Montgomery County Community College student who was preparing to transfer to Temple.  Lacey, a recent North Penn High School graduate, remains hospitalized.