Service Unexcelled

Based in San Antonio, we serve the U.S. through a direct terminal and Partner network in both LTL and Truckload services. We also perform through LTL and TL service between the United States and Mexico.

We have diversified from our roots as a South Texas LTL carrier to provide a flexible service product that incorporates technology with a variety of transportation services. Our goal is to provide solutions that fit customer requirements. Current mix of business includes a variety of manufacturing, retail, medical and distribution accounts along with a number of Tier I and II automotive suppliers.

How We Were Started


In 1930, Roy Gilbert Sr. started Gilbert Truck Line in Cotulla, TX


In 1930, Roy Gilbert Sr. started Gilbert Truck Line in Cotulla, TX

How We Were Started

In 1930, Roy Gilbert Sr. started Gilbert Truck Line in Cotulla, TX
Authority was secured to serve Laredo and the Mexican border. Through the 1940's, the fleet grew to about 50 pieces of equipment.
Southwestern Motor Transport Inc. is purchased
Service between Mexico, Canada and the United States with over 350 tractors

Our Technology

Internet Capabilities Tracing and Tracking Document Retrieval Rate Retrieval Transit Times Full EDI API capabilities Customized Reporting Optical imaging system City Dispatching System ELD compliant and Satellite tracking of over-the- road units and trailers.

Our Financial Strength

SMT is an asset based, 4a1 D&B rated, Debt Free, Privately held Corporation We have reinvested in our company for 93 years and will continue to do so.

Why Choose SMT?

93 Years Experience in LTL and TL movements.

98.5% Company wide on-time service standard

Low claim ratio less than .50%

Communication/Proven Relationships

We service all industries: Medical, Retail, Automotive, Chemical, Manufacturing, Food etc.

Our Transportation Services

Currently, we serve most of the U.S.A. in truckload and LTL. We also perform thru service between
Mexico, Canada, and the United States with over 350 tractors.


Present day operation that includes multi-state LTL coverage and network partners.

View LTL


From border to border with six thru-trailer entry ports into Mexico and thru-trailer service

View Truckload


Wing Express Delivery gives our customers an option for their expedited ground & air deliveries

View Wing


Consolidation and distribution services have been a great help to many customers

View Distribution

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Customer testimonials

A few of the nice things our customers have to say about SMT

Hands down, SMT is the best intra-tx carrier in our arsenal and it is always a pleasure working with them.
SMT's service, transit time, and pricing is accurate and consistent. The ability to speak directly to their dispatchers or managers provides a sense of reliability.
They allowed us to pick up our freight at the dock. It was fast and convenient. Everything was in great shape and the employees were so nice!

Contact us anytime: 210-661-6791   |  Custserv@smtl.com