Atlantic Systems Inc. processes this information and redistributes the data in an easy to use format. Each week's report covers the seven day period ending the preceding Saturday. Railroads originate and also move traffic jointly with other originating carriers. The carrier totals shown in Railshare aggregate all traffic handled by individual carriers. Market shares are calculated as total handlings by carrier divided by total U.S. originated rail traffic.
Railshare graphs show four major breakdowns of rail traffic.