Tighter regulation of U.S. ships carrying record exports of diesel and gasoline is coming amid the worst year for oil spills from barges since 2008. Coast Guard rules to be issued within the next 90 days would require commercial vessels nationwide to be equipped with Automatic Identification System, or AIS, technology, which uses transponders and electronic chart displays to alert pilots to neighboring ships, according to trade group American Waterways Operators. A pending inspection regulation would bring ships more in line with trains and trucks that carry similar cargo. Growing amounts of shale oil that’s made the U.S. the world’s biggest energy producer moves through inland waterways on ships almost twice as long and that carry 10 times the load of vessels plying the same routes in the 1960s. Export traffic on the Houston Ship Channel in 2013 rose 8.8 percent to a record 109.2 million metric tons. Towing […]