June 29, 2012 1:00 PM, EDT

Intermodal Traffic Rises 4.2% for Week

Bruce Harmon/Trans Pixs

U.S. intermodal traffic rose 4.2% for the week ended Saturday from a year ago, the Association of American Railroads said.

Container traffic rose 7.2% to 216,217 units, while trailers fell 9.6% to 33,101, the rail trade group said in its weekly report.

Railroad carloads excluding intermodal increased 1.4% to 288,730 units according to the AAR report.

Railroad volume is considered an important economic indicator. Intermodal traffic, which tends to be higher-valued merchandise than bulk commodities, uses trains for the long haul and trucks for the shorter distance at either end of the trip.