Outright contraction here:

No sign in a pick up in growth from Q1 to Q2:



Looks like the very small pickup in the rate of growth has at least moderated:

Rail Week Ending 27 June 2015: Just Another Bad Month for Rail

(Econintersect) — Week 25 of 2015 shows same week and same month total rail traffic (from same week and month one year ago) contracted according to the Association of American Railroads (AAR) traffic data. Intermodal traffic expanded year-over-year, which accounts for half of movements – but weekly railcar counts continues in contraction. It should be noted that the level of contraction worsened from the previous week.