U.S. News » Louisiana intends to use a federal transportation borrowing tool to construct $600 million in interstate projects that have been sought for decades to relieve traffic headaches, Gov. John Bel Edwards announced Friday. The biggest-ticket project is a $350 million widening of Interstate 10 from the Mississippi River Bridge to Interstate 12 in Baton Rouge, a daily chokepoint also considered one of Louisiana’s most dangerous stretches of roadway.