2011 , effectively handling the 3% ( 3 % ) increase in carloads . maintenance activities and weather disruptions , combined with higher volume levels , led to a 4% ( 4 % ) decrease in average train speed in 2010 compared to a record set in 2009 . average terminal dwell time 2013 average terminal dwell time is the average time that a rail car spends at our terminals . lower average terminal dwell time improves asset utilization and service