Many North Carolina residents are asking questions about the state's train safety after an Amtrak train derailed last week in Philadelphia, killing eight people.
Paul Worley, NC Department of Transportation Rail Director, said the system that would control train speed and other safety factors through GPS is being fitted on trains and switches across the state.
"NCDOT is in the process of installing Positive Train Control on our North Carolina equipment by the end of 2015," Worley said.
Worley added that improvements are also taking place on some tracks and grade crossings.