Founded in 1964, TTL is an engineering design firm focused on delivering integrated infrastructure solutions for public and private clients. From site and corridor selection to due diligence, design, and construction services, TTL is your trusted partner providing single-sourced custom solutions for complex infrastructure development. With more than 450 team members across the Southern United States, TTL provides a wide range of services including civil and geotechnical engineering; transportation design and CEI; environmental consulting and remediation; construction materials engineering and testing; and surveying, GIS, and mapping services.