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Walkability R Bloodworth


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This presentation on Walkability is for a upcoming seminar/charrette hosted by the Town of Collierville, Tn. There is a particular focus on block design as one of the key components of a wlakable neighborhood.

Published in: Education, Business, Technology

Walkability R Bloodworth

  1. 1. Walkability It’s a Human Issue! Collierville, TN Seminar. Bloodworth
  2. 2. Why it matters. 22 out of 100 26 out of 100
  3. 3. DPZ
  4. 6. 1250 Ft Chickasaw Gardens
  5. 7. Permeability
  6. 8. The Structure of a Sponge: Many, many connections
  7. 10. Poor permeability increases the distance traveled.
  8. 11. It’s all about the Block
  9. 12. Top 10 Walkability Factors <ul><li>10. Street Trees </li></ul><ul><li>9. Lower Volumes </li></ul><ul><li>8. Sidewalks </li></ul><ul><li>7. Narrow Streets </li></ul><ul><li>6. Interconnected Streets </li></ul><ul><li>5. On Street Parking </li></ul><ul><li>4. Lower Traffic Speeds </li></ul><ul><li>3. Mixed Land Use </li></ul><ul><li>2. Buildings Fronting St. </li></ul><ul><li>1. Small Block Size! </li></ul>Rick Hall, P.E. Plus Density, Vibrancy and Eyes on the Street
  10. 13. 1000 Ft Portland 250
  11. 15. 1700 2850 Ft
  12. 16. 700 2000 Ft 2250 Ft Peabody Vinton
  13. 17. 4580 Ft 5050 Ft 3300 Ft 2250 Ft 2250 Ft 1250 Ft
  14. 18. 4580 Ft 5050 Ft 3300 Ft 2250 Ft 2250 Ft 1250 Ft
  15. 19. 1380 Ft 1380 Ft 1350 Ft 1350 Ft 1550 Ft 1350 Ft 1200 Ft 450 350
  16. 20. 810 ft Average Block Perimeter
  17. 22. Block Perimeter Poundbury Block Perimeter 600-700 Radius
  18. 23. NA ? 4500 2500 2000 1600
  19. 24. Fine Grain It’s a Human Issue!
  20. 28. Block Face Block length (in feet) Excellent: 250-400 Good: 400-500 Acceptable: 500-600 Fair: 600-800 Poor: more than 800 – TND Design Rating Standards, Version 1.5 (2005)
  21. 29. Safe It’s a Human Issue!
  22. 31. Street Capacity <ul><li>4-lane arterial @ 45mph = 2400 vph </li></ul><ul><li>Two 2-lane streets @ 30mph = 3600 vph </li></ul>Credit: Tim Jackson
  23. 35. Interesting It’s a Human Issue!
  24. 38. Mixture How do you like your Pizza?
  25. 43. Downtown Collierville 68 out of 100 Pizza Supreme!
  26. 48. Measuring Walkability
  27. 49. What Makes a Neighborhood Walkable <ul><li>A center: Walkable neighborhoods have a discernable center, whether it's a shopping district, a main street, or a public space. </li></ul><ul><li>Density: The neighborhood is compact enough for local businesses to flourish and for public transportation to run frequently. </li></ul><ul><li>Mixed income, mixed use: Housing is provided for everyone who works in the neighborhood: young and old, singles and families, rich and poor. Businesses and residences are located near each other. </li></ul><ul><li>Parks and public space: There are plenty of public places to gather and play. </li></ul><ul><li>On street parallel parking. The car acts as a buffer of protection. </li></ul><ul><li>Pedestrian-centric design: Buildings are placed close to the street to cater to foot traffic, with parking lots relegated to the back. </li></ul><ul><li>Nearby schools and workplaces: Schools and workplaces are close enough that most residents can walk from their homes. </li></ul><ul><li>Streets are skinny, speeds slow. </li></ul>
  28. 51. <ul><li>Average Block Perimeter. </li></ul><ul><li>Average Block Face. </li></ul><ul><li>Blocks per Sq Mile </li></ul><ul><li>Number of intersections per Sq Mile </li></ul><ul><li>Number of uses within Walk Distance </li></ul><ul><li>Implied vehicular speeds. </li></ul><ul><li>Quality of frontages and fit-up. </li></ul><ul><li>Residential and worker density </li></ul>Measures
  29. 52. Walk Score <ul><li>Your Walk Score is a number between 0 and 100. Here are general guidelines for interpreting your score: </li></ul><ul><li>90–100 = Walkers' Paradise: Most errands can be accomplished on foot and many people get by without owning a car. </li></ul><ul><li>70–89 = Very Walkable: It's possible to get by without owning a car. </li></ul><ul><li>50–69 = Somewhat Walkable: Some stores and amenities are within walking distance, but many everyday trips still require a bike, public transportation, or car. </li></ul><ul><li>25–49 = Car-Dependent: Only a few destinations are within easy walking range. For most errands, driving or public transportation is a must. </li></ul><ul><li>0–24 = Car-Dependent (Driving Only): Virtually no neighborhood destinations within walking range. You can walk from your house to your car! </li></ul>
  30. 53. RDI Example: Pre Neighborhood Connector Route Directness Index can better illustrate “before-and-after” Plan improvements Existing Shared-Use Path Route Directness Index Crow Flight Walk Distance RDI / = Transpogroup 1850 ft 1850 ft RDI: .20 .20 375 ft 375 ft
  31. 54. RDI Example: Post Neighborhood Connector Route Directness Index can better illustrate “before-and-after” Plan improvements Existing Shared-Use Path Route Directness Index Crow Flight Walk Distance RDI = New Neighborhood Connectors / Transpogroup 375 ft 375 ft RDI: .83 .83 450 ft 450 ft
  32. 55. The Regional Picture Putting it all together
  33. 58. Australian Urban Model; Evan Jones
  34. 59. Credits: Movement for Israeli Urbanism and the J. Blaustein Institutes for Desert Research MICHAEL MEHAFFY, SERGIO PORTA, NIKOS SALINGAROS, YODAN ROFE
  35. 60. Walkability It’s a Human Issue!
  36. 61. Additional Slides For discussion if needed
  37. 63. Block Perimeter Block Perimeter (in feet) Excellent: 1000-1600 Good: 1600-2000 Acceptable: 2000-2400 Fair: 2400-3200 Poor: more than 3200 How long will it take to walk the perimeter of the block?
  38. 64. Streets Designed for Everyone <ul><li>Complete Streets are roads are designed for everyone who uses them, including bicyclists, pedestrians of all ages and abilities, and people getting on and off transit vehicles. These streets are: </li></ul><ul><li>Accessible: There are wheelchair ramps, plenty of benches with shade, sidewalks on all streets, etc. </li></ul><ul><li>Well-connected: Streets form a connected grid that improves traffic by providing many routes to any destination. </li></ul><ul><li>Built for the right speed: Lanes are narrow or traffic calming is in place to control speed. </li></ul><ul><li>Comfortable: Pedestrian medians at intersections, count-down crosswalk timers, bicycle lanes, protected bus shelters, etc. make the street work better for those outside of a car. </li></ul>