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PAVEMENT AND CURB MARKINGS Done by: Abdullah Eawada Mohammed Habboub

PAVEMENT AND CURB MARKINGS Done by: Abdullah Eawada Mohammed Habboub Presented to: Dr. Esam Almasri. Why Using Pavement Markings?. “ Pavement markings can enhance safety since centerlines have been shown to cut crash frequency by 29% compared to roads without them ”.

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PAVEMENT AND CURB MARKINGS Done by: Abdullah Eawada Mohammed Habboub

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  1. PAVEMENT AND CURB MARKINGS Done by: Abdullah EawadaMohammed Habboub Presented to: Dr. EsamAlmasri

  2. Why Using Pavement Markings?

  3. “Pavement markings can enhance safety since centerlines have been shown to cut crash frequency by 29% compared to roads without them” Wisconsin Transportation Bulletin • No. 9

  4. Limitation VS. Advantages

  5. Limitations: Obliterated by snow Not clearly visible when wet Not very durable under heavy traffic Need refreshment every year or more Advantages: conveying information to drivers without diverting their attention from the road. Inexpensive

  6. Markings Standards:

  7. Markings that must be visible at night shall be retroreflective • In any case, all markings on Interstate highways shall be retroreflective. • Markings must be clear

  8. Markings Colors:

  9. White

  10. Yellow

  11. Red: • Raised pavement markings

  12. Blue

  13. Purple : For toll plaza

  14. Markings Categories: • Longitudinal • Transverse

  15. Longitudinal Lines: • Yellow • White

  16. Yellow Lines: • Center Line • No-Passing Zone • Other

  17. Yellow Center Line Pavement Markings Warrants • It used to delineate the separation of traffic lanes that have opposite directions of travel on a roadway

  18. Yellow center Line could be: • A normal broken yellow line … crossing the center line markings is permitted. • A broken line is formed of segments and gaps, usually in the ratio of 1:3.

  19. Yellow center Line could be: • One-direction no-passing zone … crossing the center line markings for passing with care is permitted for the traffic traveling adjacent to the broken line, but is prohibited for traffic traveling adjacent to the solid

  20. Yellow center Line could be: • Two-direction no-passing zone… crossing the center line markings for passing is prohibited for traffic traveling in either directions.

  21. Yellow center Line should be placed in: • Urban arterials and collectors that is: • 20 feet or more in width and • ADT of 6,000 vehicles per day or greater. • All rural arterials and collectors that is: • 18 feet or more in width and • ADT of 3,000 vehicles per day or greater. • All two-way streets or highways that have three or more lanes.

  22. Other Yellow Line Type: • If reversible lanes :consist of a normal broken double yellow line to delineate the edge of a lane in which the direction of travel is reversed from time to time.

  23. White Lines:

  24. White normal broken line • Used on all roadways that are intended to operate with two or more adjacent traffic lanes in the same direction of travel

  25. White dotted line • Used to separate a through lane that is : • A deceleration or acceleration lane. • A through lane that becomes a mandatory exit or turn lane. • They have noticeably shorter segments: for example, a 2’ line and a 2’ to 6’ gap.

  26. Dotted Deceleration • Parallel • Tapered

  27. Dotted deceleration • Parallel with multilane

  28. Dotted Acceleration • Parallel • Tapered

  29. Dotted Acceleration • Tapered

  30. Wide dotted white lane line • It is used: • As a lane drop marking in advance of lane drops at exit ramps to distinguish a lane drop from a normal exit ramp.

  31. Lane drop as a single lane exit ramp

  32. Lane drop as a Multi- lane exit ramp

  33. Two-Lane drop at an exit ramp

  34. Wide dotted white lane line • It is used: • In advance of freeway route splits with dedicated lanes

  35. Rout split with dedicated lanes

  36. Wide dotted white lane line • It is used: • To separate a through lane that continues beyond an interchange from an adjacent. • Or An Auxiliary lane between an entrance ramp and an exit ramp

  37. Cloverleaf interchange

  38. Wide dotted white lane line • It is used: • As a lane drop marking in advance of lane drops at intersections to distinguish a lane drop from an intersection through lane

  39. Lane drop at intersection

  40. Wide dotted white lane line • It is used: • To separate a through lane that continues beyond an intersection from an adjacent auxiliary lane between two intersections

  41. Auxiliary lane between intersections

  42. Through Intersections Markings • White • Yellow

  43. Wide dotted white lane line • It may be used: • Through intersections. Where greater restriction is required, solid lane lines or channelizing lines should be extended into or continued through intersections or major driveways.

  44. Lane-Reduction Transition Markings • White • Yellow

  45. Lane-Reduction Transition Markings • Used to guide traffic through transition areas where the number of through lanes is reduced

  46. Approach Markings for Obstructions • White • Yellow

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