through a site like that don't want that to happen >>> jeffrey is the general manager, the south-eastern peninsula authority. his office is 328 million to have train control. >> what it does is it can stop a train or limit the speed of a train. engineers have been testing technology designed to override engineers. >> if he attempts to go over speed or past the stopping point. it will stop the train. the national transportation safety board has been calling for the technology for more than four decades. for septemberer, it means covering 250 miles of track and transponders, and hauling it in to the warehouse, to install it in security systems. that federal deadline aimed at commuter rail lines like this. carrying hazardous materials is no longer binding. that's because of a move that sparks controversy. back in 2008 congress starts a bill to install positive train control. several minutes later, lawmakers here in washington extended the dead lines. >> reporter: congress gave the rail roads three more years. they lobbied lawmakers saying testing is needed. rail roads are dragging their feet because of costs.