GSI HighProducts way is the exclusive Texas Distributor of the U-MAD Truck Mounted Attenuator from Barrier Systems, Inc.


The U-MAD TMA is an NCHRP-350 TL-2 and TL-3 approved TMA designed to absorb energy and prevent underride from errant vehicles, while protecting the tow truck and expensive equipment. After a design impact only the cartridge (see product info sheet below) needs replacing, offering excellent life cycle costs on the TMA.


Designed for performance, the U-MAD has passed all required and optional NCHRP-350 TL-2 and TL-3 tests with the arrow board installed.


The U-MAD is ideal for stationary applications such as guardrail or crash cushion repair where the TMA is operating as a barrier vehicle. It is also ideal for slow moving applications such as striping or sweeping where it is operating as a shadow vehicle.

Watch this video that shows the value of Truck Mounted Attenuators (TMA & TTMA) for workers, contractors, and drivers on the highway.

Features and Benefits:

  • Replace only the cartridge after a design impact

  • Passes all mandatory and optional NCHRP 350 TL-2 and TL-3 tests with an arrow/message board installed

  • Engineered to keep the impacting vehicle and support vehicle in the travel lane even after angle impacts

  • Light weight system

  • Multiple flexible mounting options

  • Optional cab-mounted controllers

Mounting Options:

  • Socket Hitch

  • Bolt On

  • Tailgate Mount for Dump Trucks

  • Quick-Connect

  • Extension

  • Flatbed Mount


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720 West Wintergreen
Hutchins, Texas 75141

Ship & Receiving

Mon thru Fri

7:30 AM to 4:00 PM

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(972) 225-6662​ fax

GSI is a leading producer and supplier of steel bridge rails, pedestrian rails, handrails, highway guardrail, traffic safety products, traffic control products, and attenuators to the highway, bridge, and utility construction markets.

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