The SST® is a trailer mounted attenuator used to absorb rear-end impacts during stationary and mobile operations. The system utilizes anti-rotational dampeners to minimize horizontal movement during impacts and requires a minimum support vehicle weight of 9,220 lbs. (4,500 kg). The durable steel frame and crushable aluminum cartridges absorb vehicles traveling up to 100km/hr making it NCHRP Report 350 Test Level 3 compliant. 

In stock

Features & Benefits

  • Heavy duty Torflex® axle and wheels
  • Arrow board mounting systems available
  • Tested to NCHRP Report 350 TL-3 (impact speeds up to 100km/hr)
  • Trailer system for more efficient deployment and truck fleet utilization
  • Anti-rotational dampeners are designed to help minimize rotation during impact
  • Designed to help minimize damage from low-speed nuisance hits up to 10 km/hr


  • 2,606 lbs. (1,182 kg)
  • 18’ 11” (L) x 7’ 9″ (W) x 3’ 9″ (H)
  • 9,920 lbs. (4,500 kg) minimum support vehicle weight

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