Tsiouvaras Simmons Holderness has a broad variety of experience with high-speed transportation facility design, with experience in mainline freeway geometric design, interchange design, and regional highway design.  We provide the range of design services including:

•  Alternatives development and analysis,
•  Design of safety improvements,
•  Grading and modeling design
•  3D models and drive-through simulations
•  Utility Coordination and design
•  Preliminary and final design,
•  Construction phasing design
•  Final construction bid documents.