WASHINGTON, DC — Winter storms continued to have an impact on rail freight traffic during the week ended January 27 as car loadings, intermodal volume and ton-miles were all down in comparison with the corresponding week last year, the Association of American Railroads (AAR) reports. Intermodal volume totaled 229,178 trailers or containers, down 0.5 percent from last year, with container volume up 3.7 percent but trailer volume down 13.0 percent. Carload freight, which doesn't include the intermodal data, totaled 320,170 cars for the week , down 5.2 percent from the comparable week last year. Loadings were down 4.4 percent in the West and 6.3 percent in the East. Total volume was estimated at 32.5 billion ton-miles, off 4.1 percent from last year. Cumulative volume for the first four weeks of 2007 totaled 1,235,173 carloads, down 6.6 percent from 2006; 879,500 trailers or containers, off 1.5 percent; and total volume of an estimated 125.3 billion ton-miles, down 5.4 percent from last year.