December 7, 2015, 10am PST
At critical points, Dallas' streetcar system runs without overhead cables. Two batteries underneath the car store enough power to propel the train across a mile-long bridge.
October 1, 2008, 10am PDT
Federal legislation that would require and partially fund Positive Train Control technology, which, had it been installed by Metrolink, would have prevented the Sept. 12 crash, is held up in the Senate by a fiscal hawk wary of funding Amtrak.