1 / 35

Draft Design Guidelines to Accommodate Peds and Bikes at Interchanges

Draft Design Guidelines to Accommodate Peds and Bikes at Interchanges. Meghan Mitman Fehr & Peers August 15, 2011. Background. Goals. Where does the Freeway end?. Leaving the Freeway, Entering a Neighborhood. Guiding Principles. On-Ramps.

merrill-donaldson
Download Presentation

Draft Design Guidelines to Accommodate Peds and Bikes at Interchanges

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Draft Design Guidelines to Accommodate Peds and Bikes at Interchanges Meghan Mitman Fehr & Peers August 15, 2011

  2. Background

  3. Goals

  4. Where does the Freeway end?

  5. Leaving the Freeway, Entering a Neighborhood

  6. Guiding Principles

  7. On-Ramps

  8. Ramp geometrics minimize speed for vehicles leaving the arterial Landscape buffer provided between sidewalk and bike lanes, including on the structure as feasible Crosswalk located in location with lowest speed and highest visibility Dashed bike lane begins before on ramp lane; optional exit ramp Directional curb ramps with truncated domes, high visibility striping provided for all crosswalks

  9. HOV Lane added downstream of crosswalk

  10. Bike weaving zone provided through long on-ramp

  11. Advance yield limit line provided on dual lane crossing (advance stop bar if signalized). Bicyclists have option to use crosswalk (with ramps). Raised (landscaped) buffer provided between bike lane and on-ramp lanes

  12. Off -Ramps

  13. Ramp geometrics minimize speed for vehicles leaving the freeway. Ramp is stop controlled.

  14. Optional bicycle exit ramp

  15. Bike lane crossing - detail

  16. In this configuration, ramps should be signalized. Bicycle detection and optional ramps accommodate bikes at the crosswalk.

  17. Advance yield limit line is provided across dual lane ramp. Advance stop bar if signalized.

  18. SPUIs

  19. Source: FHWA Possible ped crosswalks Vehicle phase 1 Vehicle phase 2 Vehicle phase 3 With most SPUIs there is never a phase when pedestrians can cross the urban arterial without conflict Solution: Two-step crossing (one step during vehicle phase 2 and the other during vehicle phase 3)

  20. Each stage is coordinated with the downstream signal in the same direction

  21. Source: FHWA Possible ped crosswalks Vehicle phase 1 Vehicle phase 2 Vehicle phase 3 Peds with vehicle phase 2 Peds with vehicle phase 3

  22. Skip Striping throughComplex Intersections

  23. Advance crosswalk controlled with a signal or HAWK beacon

  24. Determining Crosswalk Treatments

  25. Note: Spreadsheet should supplement engineering judgment and should be used in conjunction with treatment fact sheets per NCHRP Report 562. Credit: Fehr & Peers, April 2008. Version 1.02

  26. Thank You! • Meghan Mitman • 415-384-0300 • m.mitman@fehrandpeers.com

  27. Design Assumptions

  28. High Speeds, Poor Visibility

  29. Prefer Slow Speed, Right Angle Urban Designs

  30. Source: FHWA Old ramp alignment Positive example: reconfigured ramp terminus Flat angle = wide crossing & high-speed turns Tight angle = short crossing & slow speed turns Springfield OR

  31. Source: FHWA • Red line = old crosswalk • Green line = new crosswalk Springfield OR

  32. Savings in Land Area, Less Ped “Dead Zone”

  33. What you don’t see in this presentation… • Right turn lane adjacent to shared right-thru

More Related