backstop for train drivers facing a increasingly trem job. >> they're asked to be do more than ever before. he's asked to do the job of two to three people. >> jeff kline is the engineer of a commuter train in chicago that transports hundreds of people per day. >> what were you watching coming out? >> signals, crossing gates, pedestrians, pedometer. >> he's piloting a seven car train 100 miles through suburban chicago and he has to divide his attention between signals, sounds and safety. >> about how fast are we going? >> 60 miles an hour. >> and how long would it take to stop? >> a control stop like coming into a station, probably take about four-tenths of a mile. >> and that would take almost a full minute. and then there's the dead man