Prosecutors also name two other lobbyists, charging the executives with multiple counts of bribery and conspiracy; defendants' attorneys claim their clients are innocent.
The contractor responsible for manufacturing defective concrete panels for the Silver Line Metro extension in northern Virginia was banned from bidding federal transportation projects for three years.
Vijay Associates, a federal and state subcontractor, padded hours on New York and Massachusetts transit and other projects, says U.S. Attorney in Boston.