phone: (972) 225-1660     Fax: (972) 225-6662
The Revolutionary STI TTMA-100 is taking the nation by storm!

Overhead view of small car impact

GSI Highway Products is the exclusive distributor of the Gregory Industries (formerly STI) trailer truck mounted attenuator, the TTMA-100, for Texas and Oklahoma with the ability to sell in markets across the United States, Mexico, and the Middle East.

Competitively priced!
Can be equipped with an arrow board or VMS.

Contact us

Today for a free, no oblligation quote!

Payton Leftwich, Inside Sales Representative
(972) 619-6685
(972) 251-0883 (mobile)
payton@gsihighway.com

Boyd Milby, Outside Sales
(972)-619-6674
469-394-5776 (cell)
boyd@gsihighway.com

State Approval Letters
Oklahoma
Texas
Arkansas only needs NCHRP 350 TL3 approval.

Crash Test Videos for the TTMA-100

Click link. Streaming Windows Media (WMV) format. Sizes up to 4M.


Supporting Documents and Manuals for the TTMA-100


Research / Helps


In the News - TMAs