As if Boston didn't have enough problems with its infamous “Big Dig” construction project, one of the most expensive constructions since Egypt's Great Pyramid at Giza. According to a recent posting at, Massachusetts' top highway official says all lighting fixtures in the Big Dig tunnels must be replaced at a cost of $54 million because of problems with corrosion and be replaced with LED lighting fixtures. said one of the eight-foot lighting fixtures fell from the ceiling of the Thomas P. (“Tip”) O'Neil Tunnel in Feb., 2011, and since that time engineers have “temporarily shored up the 8-foot light fixtures in the 7.5 mile tunnel system with plastic ties.” The fixtures were manufactured by NuArt Lighting, which was acquired in 2006 by National Signal Corp.