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Forging new generations of engineers

Forging new generations of engineers. Road Design. A Process for Road Layout. Road Design. Check the existing Topographical data. Road Design. Decide on the type of road and characteristics Freeway Arterial Collector Feeder. Road Design.

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Forging new generations of engineers

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  1. Forging new generations of engineers

  2. Road Design A Process for Road Layout

  3. Road Design • Check the existing Topographical data

  4. Road Design • Decide on the type of road and characteristics • Freeway • Arterial • Collector • Feeder

  5. Road Design Setting up a chart for survey data and control points

  6. Transit Line Road Design Setting up the 90° Intersection

  7. Road Design • Plan the Start of the Curve (PC)

  8. Road Design Add information to the chart

  9. Layout the Curve Road Design

  10. Road Design Curve information Knowns R=300’ ∆=33°34’ Now Calculate the Unknowns about the curve.

  11. Road Design To find the distance from P.C. to P.T. use the formula

  12. Road Design

  13. Road Design Convert 33°34’ to degrees 34’/60’=.567 33°34’ =33.567°

  14. Road Design Back to the Formula L=175.756’

  15. Road Design Finding the angle of the 100’ chord (D) Bisect the angle to create a Right Triangle Inverse SinX=9.594° D=2(9.594°) D=19.1881° D=19°11’

  16. Road Design Add information to the chart

  17. Road Design Continue laying out the road and points

  18. Road Design To create the vertical profile of the road, lines are dropped from the station points and an exaggerated vertical scale is created. Elevation data from existing station points are plotted to a graph.

  19. Road Design A line is plotted through the points. The line is then smoothed and parabolic transitions are added between slopes.

  20. Road Design Vertical information is transferred back to the control points.

  21. Freeway: A road with limited access that generally handles between 1,000-1,300 cars per hour per lane.

  22. Arterial: Roads that carry between 400 to 800 cars per lane per hour depending on businesses,  parking, signs, and control signals.

  23. Collectors: Local roads that can generally carry 100-250 cars per lane per hour.

  24. Feeder: Local streets, Cul-de-sacs, or loops that service neighborhoods.

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