1. Barrier Design Principles

2. Principle 1: Distance from Roadway Place Guardrail As Far From Traveled Way As Practical

3. Principle 2: 2 Minimum Clearance For Slope Locations 2 Measured From Back of Post Hinge Point

4. Reduce post spacing

5. Principle 3: Barrier to Hazard Distance Barrier to Hazard Distance Is Critical Element

6. TT hit pier

7. Principle 4: Terrain Effects Curbs Slopes

8. Curbs Not Recommended on High-Speed Roadways Or With Guardrail Unless Adequately Stiffened

9. Modified curb

10. Slopes Maximum slope of 1:10 or Flatter in Front of Barriers Vehicle will be airborne due to slope. The height of the rail and correlation to the height of the bumper is critical. Guardrail should not be installed on a slope steeper than 1:6

11. Recommended Barrier Placement on Slopes

12. Rail away from road