The VORTEQ® is a trailer mounted attenuator for use on stationary or moving shadow support vehicles with a minimum weight of 9,920 lbs (4,500 kg). 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 a lightweight tube-in-tube frame rail and a wheel/axle assembly. The VORTEQ® 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.