Oil trains sit idle on the BNSF Railway's tracks in Chicago's Pilsen neighborhood. David Schaper/NPR hide caption

itoggle caption David Schaper/NPR

Former House Speaker Dennis Hastert this week pleaded not guilty to breaking banking laws and lying about the money to the FBI. The federal judge in the case will preside over it after the parties declined his offer to recuse himself. Christian K. Lee/AP hide caption

itoggle caption Christian K. Lee/AP

Despite Congress mandating all railroads be equipped with a Positive Train Control system by the end of the year, Chicago's Metra system isn't expected to reach that goal until 2019. Most commuter trains won't meet the deadline. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

Officials attend the launch of a Positive Train Control system for Los Angeles' Metrolink commuter trains in February 2014 at Los Angeles Union Station. Congress mandated the technology after a Metrolink engineer ran a red light while he was texting and crashed head-on with a freight train in 2008. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP