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Clear Zone

Clear Zone. RDG Chapter 3. What is a Clear Zone?. Clear Zone. Clear Zone: A “Clearer” Definition.

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Clear Zone

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  1. Clear Zone RDG Chapter 3

  2. What is a Clear Zone?

  3. Clear Zone Clear Zone: A “Clearer” Definition A traversable area that starts at the edge of the traffic lane, includes the shoulder, and extends laterally a sufficient distance to allow a driver to stop or return to the road before encountering a hazard or overturning Shoulder Traffic Lane

  4. Clear Zone Influence Factors • Roadway Design Speed • Traffic Volume • Embankment slope • Horizontal Curvature of the roadway

  5. Minimum Clear Zone Distances

  6. 4 1 1 3 Slopes and the Clear Zone

  7. Steepness Categories of Slopes • Recoverable - 1:4 or Flatter ** • Non-Recoverable: 1:3 to 1:4 ** • Critical: Steeper than 1:3 **Traversable

  8. 4 1 Recoverable (Traversable)

  9. 4 1 1 3 Non-Recoverable (Traversable)

  10. 1 3 Critical (Not Traversable)

  11. Horizontal Curves and the Clear Zone

  12. Table 3.2 Horizontal Curve Adjustments

  13. Figure 3.6 Figure 3.6: VEE DITCHES

  14. Clear Zone Case Studies

  15. Country road

  16. Pavement markings

  17. Add edge lines

  18. Geometric and roadside inconsistency

  19. Don’t surprise the driver Maintain ConsistencyIn Roadway Design Don't Surprise The Driver!!

  20. Optimum design

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