“Do Not Hump” With one of CSX’s eight autonomous track assessment cars (ATACs), CSXT 994374 (a/k/a ATAC 5) on the head end, followed by a very healthy cut of Tropicana® reefers, CSXT 977 and CSXT 3137 bring priority intermodal I032 (Jacksonville, FL to North Bergen, NJ) across the Susquehanna River (and Garrett Island) on the B&O bridge that opened for business on January 6, 1910.