Welcome to SAI! We are a transportation-focused civil engineering and construction management firm specializing in bridge and highway design, structural inspection, traffic engineering, design management, and construction management and inspection.  A leader in the field of transportation design and construction management, SAI has provided government and private sector clients with innovative, accurate, and reliable design and consulting engineering services for nearly 60 years.

Project Spotlight:


SR 981 Section V10 – Kennametal & Arnold Palmer Regional Airport

Westmoreland County, Pennsylvania SAI was responsible for the design of a project to enhance safety and operational efficiency on SR 981 in Unity Township, Westmoreland County. Efforts included the design of lane and shoulder widening, and the design of a single-lane roundabout at the junction of SR 981 with Arnold Palmer Regional Airport Drive and relocated SR 2027. The project also entailed the addition of a center turn lane, drainage improvements, traffic control, stormwater management, erosion and sediment pollution control, ...