Metalith
- Offers blast mitigation barriers and K12-certified anti-ram vehicle barriers for use in perimeter security. Site includes blast mitigation and crash testing videos.
- http://www.themetalith.com/

Trinity Industries, Inc.
- Manufacturers of highway safety products, including crash cushions, guardrail end treatments and barrier systems. Detailed installation instructions online.
- http://www.highwayguardrail.com/

Hwycom, Inc.
- Producer of fiberglass breakaway sign supports and barricades . Includes a video of a crash test and data for test results at 20 and 60 mph.
- http://www.hwycom.com/

Hill and Smith
- Manufacture and supply highway safety systems, including safety barriers, and crash cushions. Features a range of product data and technical specifications.
- http://www.hill-smith.co.uk/

Border Barrier Systems Ltd.
- Manufacture moulded polyethylene delimitation barriers for traffic and pedestrians at road works and construction sites. Includes product applications and specifications.
- http://www.borderbarriers.co.uk/

Concrete Solutions Inc.
- Produce a cement based sound absorption barrier/wall panel . Includes product technical information and typical uses.
- http://www.soundsorb.com

Barrier Systems, Inc.
- Manufacturers of moveable barriers for protection in highway construction zones.
- http://www.barriersystemsinc.com

Bay Area Barricade Service, Inc.
- Offers traffic safety equipment to construction and municipal organizations.
- http://www.babsinc.com

Klemmfix
- Manufacturer of traffic barrier and control systems.
- http://www.klemmfix.com

Bryson Products, Inc.
- Highway guardrail systems manufacturer.
- http://www.guardrails.com