Safety Inspections of Highway Structures & Bridges and Support Structures for TCDs, Virginia Department of Transportation – Northern Virginia District: CST, as a subconsultant, is performing the safety inspections, analysis (load ratings), and repair recommendations for various types of highway bridge structures (including culverts, trusses, and other major structures), and various types of ancillary structures (including, but not limited to, overhead sign structures, traffic signal supports, dynamic message sign (DMS) structures, lighting and camera poles, and luminaires) located in the Northern VA District.