T M A The Alpha70K Truck Mounted Attenuator meets NCHRP 350, Test Level 2 for use in work zones with design speeds up to 70km/h. The system features a lightweight aluminium cartridge that withstands harsh weather conditions and corrosive elements. The system's resilient Durashell™ nose withstands nuisance hits up to 8km/h with no damage to the unit. This TMA is ideal for slow moving and stationery operations to reduce the severity of rear-end collisions for motorists!