average train speed 2013 average train speed is calculated by dividing train miles by hours operated on our main lines between terminals . lower volume levels , ongoing network management initiatives , and productivity improvements contributed to 16% ( 16 % ) and 8% ( 8 % ) improvements in average train speed in 2009 and 2008 , respectively . average terminal dwell time 2013 average terminal dwell time is the average time that a rail car spends at our terminals