NEW : Official : No reason , based on schedule , that fatigue should have been a factor . `` I 've investigated many accidents and trains do different things , '' National Transportation Safety Board investigator Tim DePaepe said of the train climbing the escalator . Comment: Incident did prompt transit agency to look at train operator scheduling . 32 people were injured in last month 's incident at the end of Chicago 's Blue Line . A union official had said there were `` indications '' that the train operator `` dozed off ''
NEW : Official : No reason , based on schedule , that fatigue should have been a factor . Comment: Incident did prompt transit agency to look at train operator scheduling . 32 people were injured in last month 's incident at the end of Chicago 's Blue Line . A union official had said there were `` indications '' that the train operator `` dozed off ''