* T.L. Adams And Associates - Providing forensic consulting engineering and investigation services for civil, structural, geotechnical, electectrical and mechanical engineering disciplines.
* Traffic Planning and Design, Inc . - Provides transportation engineering and related environmental services to state, municipal, and private clients.
* Traffic Solutions - Philippines supplier and installer for traffic and road equipment, devices and materials; controller VMS, thermoplastic road markings, studs and signs.
* Transmetrics, Inc. - Provides professional civil engineering, transportation planning, and construction management services to public and public sector clients.
* Tutor-Saliba Corporation - Civil engineering services, focusing on public works projects.
* Ulteig Engineers and Land Surveyors - Complete planning, design, construction management services for mechanical, electrical, civil, structural, municipal, and transportation engineering services. Land surveying services include GPS.
* Urban Engineers, Inc. - Provides planning, design, and construction management services for highways, transit, bridges, airports, and more.
* USI Consultants, Inc. - Transportation and civil engineering, surveys, and construction inspection.
