Report: 61,000 U.S. bridges 'structurally deficient'
Wednesday, April 1, 2015 - 11:00
in Physics & Chemistry
Amy R. ConnollyWASHINGTON, April 1 (UPI) -- Some 61,000 United States bridges are structurally deficient and in need of "significant repair," the American Road & Transportation Builders Association said.