U.S. policy makers have been considering the viability of short sea shipping for more than 20 years as a means of taking traffic off of crowded U.S. highways and rail lines. In a study entitled “The Impact of Modifying the Jones Act on U.S. Coastal Shipping” just issued, the University of New Orleans associated authors conclude that coastal services “are uncompetitive with present truck and rail services” even if the U.S. build requirement of the Jones Act did not apply.