| TSRR Southbound Local Freight Train ( Columbia, Tn. to Florence, Al. Turn ) passing through Dunn, Tn. TSRR interchanges with CSXT in Columbia, Tn. & NS in Florence, Al. My experience with TSRR the few times Ive visited them, the northbound runs early in the morning to Columbia, Tn. to interchange with CSXT, then runs back south toward Mt. Pleasant in the afternoon, then heads to Lawrenceburg, Tn. where the 1st crew ties down, then a 2nd crew takes the train on to Florence, Al. from Lawrenceburg, Tn. to interchange with NS |