Trinity Alpha 70K TMA 7590, Product Description And Assembly Manual

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www.energyabsorption.com Revision B December 2013
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Definition -The BARRIER VEHICLE is the truck on which a TMA is mounted, while positioned
upstream (towards the direction that traffic is approaching) of a work zone.
The SHADOW VEHICLE is the truck on which a TMA is mounted, which is following behind a
moving operation such as striping, spraying, etc.
THE USE OF A TMA ON THE BACK OF A TRUCK IS INTENDED TO:
 Gradually decelerate the impacting vehicle
 Protect the occupants of the impacting vehicle
 Protect the barrier/shadow vehicle occupants
 Reduce damage to the barrier/shadow vehicle
If these impacts occur within NCHRP 350 criteria the TMA
WILL NOT:
 Affect the skid (roll ahead) distance of an impacted truck.
KEEP WORK CREWS CLEAR!
CONTROLLING SKID DISTANCE (ROLL AHEAD):

Skid distance is significantly increased and is less predictable for lighter
shadow/barrier vehicles
 Skid distance is reduced and is more consistent when heavier shadow/barrier
vehicles are used

Required Truck Weight: 12,000kg [26,460 lbs.] to 11350 kg [25,000 lbs.]
 Recommended Curb Weight: 9000 kg [19,845 lbs.]