'Bridge in a backpack' gets important approval

The "bridge in a backpack," a composites bridge developed by the University of Maine, received a key approval from a national transportation nonprofit that could advance efforts to expand its commercialization. U.S. Sen. Susan Collins, a member of the Senate Transportation Appropriations Committee, in a press release Friday said that the American Association of State Highway and Transportation officials approved the technology, "[signifying] the potential growth of this revolutionary ...