Hill & Smith Inc.
ConstructionOhio, United States51-200 Employees
Hill & Smith Inc. is a mid-sized construction-focused manufacturer based in Columbus, Ohio. It produces transportation safety products, including the MASH-compliant Smart Cushion impact attenuator, the portable steel barrier Zoneguard, and work zone safety equipment such as Smart Work Zone Systems, message boards, arrow boards, and traffic controls. These products are designed to advance work zone safety, ITS, and roadside safety across the United States. In September 2025, Hill & Smith announced a merger of its trailer business with National Signal Inc., based in La Mirada, California. The announcement described the merger as part of the company's ongoing growth strategy.