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Welcome . Highway Engineering Code No. (CM 304). Lec . 3. Dr.Khaled ali. Geometric Design. CEE 320 Steve Muench. Outline. Concepts Vertical Alignment Fundamentals Crest Vertical Curves Sag Vertical Curves Examples Horizontal Alignment Fundamentals Superelevation

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Welcome

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  1. Welcome Highway Engineering Code No. (CM 304) Lec. 3 Dr.Khaledali

  2. Geometric Design CEE 320Steve Muench

  3. Outline • Concepts • Vertical Alignment • Fundamentals • Crest Vertical Curves • Sag Vertical Curves • Examples • Horizontal Alignment • Fundamentals • Superelevation • Other Non-Testable Stuff

  4. Concepts • Alignment is a 3D problem broken down into two 2D problems • Horizontal Alignment (plan view) • Vertical Alignment (profile view) • Stationing • Along horizontal alignment • 12+00 = 1,200 ft. Piilani Highway on Maui

  5. Stationing Horizontal Alignment Vertical Alignment

  6. Sight Distances • Definition • Sight Distance is the length of a road visible to a driver clear of objects while driving a vehicle. • The Sight Distances can be split up into the following two broad categories: • Stopping Sight Distance (Non-passing or Non-overtaking Sight Distance); and • Passing or Overtaking Sight Distance.

  7. Measurement of stopping sight distance.

  8. Measurement of full overtaking sight distance

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