The SS90™ HD is a heavy duty, truck mounted attenuator (TMA) for use on stationary or moving shadow support vehicles. It is tested to NCHRP Report 350 Test Level 3. Additionally, it is further tested to the UK TD 49 (110 km/h) standard. The unit is comprised of two lightweight aluminum cartridges contained in a potentially reusable galvanized support frame.* The SS90™ HD is designed to help absorb rear-end impacts at speeds up to 62 mph (100 km/h) when impacted within NCHRP Report 350 crash test standards.
*After an impact, the product must be inspected and evaluated per the direction of the specifying roadway authority. The ultimate decision on reusability rests with the specifying roadway authority and/or state DOT.