Highway/Interchange Design

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 a 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