North America
1. ADDCO
ADDCO, Inc., is a diverse enterprise comprised of the Traffic Control Group and the Industrial Products Group. Founded in 1953 and based in St. Paul, ADDCO is a recognized worldwide leader in traffic management products and systems, including portable dynamic message signs, portable traffic signals, the BRICK® modular message sign system, the Smart Zone® portable traffic management system, and fully integrated intelligent transportation systems using VTOC software.
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