Domestic container volume continued its steady performance in the second quarter of 2013 with 9 percent year-over-year gains, largely attributable to a strong big box segment, with total intermodal traffic rising by 2.4 percent for the quarter, reports industry trade association IANA. International volume was unable to build on its solid Q1 growth, falling 1.3 percent in Q2 after posting 3 percent gains in Q1. This decline can be attributed to surprisingly weak shipments in June, with loads falling 6 percent from a year ago.