1. Elements of Highway Design Highway Design SafetyEfficiency

2. Relating Highway Design to Safety

3. Relating Highway Design to Efficiency

4. The Tacoma Narrows

6. The Design Process Current efficiency Design constraints Create new design Determine cost of improved design Evaluate efficiency of new design If not acceptable  modify design

7. The Tacoma Narrows Design Concept Performance  congested speed Problem  not enough capacity Basic solution  add more lanes How many lanes? How much will it cost? How will we fund it?

8. Tacoma Narrows Toll Facility