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Road Design

Road Design. Susan Handy TTP Orientation Seminar October 2009. Topics. Network design Facility design. Network Design. What are the two main purposes of streets/roads/highways? What’s the main difference between streets vs. roads vs. highways?.

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Road Design

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  1. Road Design Susan Handy TTP Orientation Seminar October 2009

  2. Topics • Network design • Facility design

  3. Network Design • What are the two main purposes of streets/roads/highways? • What’s the main difference between streets vs. roads vs. highways?

  4. National Committee on Urban Transportation, 1958

  5. City of Sunnyvale, 1957

  6. ITE Street Layout Principles, 1984

  7. City of Austin, Comprehensive Plan, 1994

  8. Connectivity Measures

  9. Benefits of grid…? • More direct routes • Less distance • Less driving (?) • Less pollution, energy consumption, noise, etc. • More walking/biking • More exercise, less weight, better health, etc. • Better efficiency • Emergency response time • City services

  10. Source: Handy, Paterson, and Butler 2003

  11. Source: Handy, Paterson, and Butler 2003

  12. Source: http://www.fotosearch.com/photos-images/cul-de-sac.html

  13. Berkeley Diverters Source: http://www.ci.berkeley.ca.us/transportation/Bicycling/BB/BicycleBoulevardTreatments.html

  14. Village Homes, Davis Source: Google Maps

  15. Davis Greenbelt System

  16. Houten, Netherlands Source: Google Maps

  17. Source: Google Maps

  18. Facility Design • Responsibility for building: • City/County: local streets, collectors, arterials • State: highways, freeways • Influence on professional practice: • Institute of Transportation Engineers (ITE) • American Association of State Highway and Transportation Officials (AASHTO)

  19. http://www.ite.org/bookstore/RP-011C.pdf

  20. http://www.ite.org/bookstore/RP-011C.pdf

  21. http://www.ite.org/bookstore/RP-011C.pdf

  22. Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

  23. Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

  24. Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

  25. Source: http://www.ashland.or.us/Files/street%20standards_001.pdf

  26. Innovations/Trends • Traffic Calming • Skinny Streets • “Complete the Streets” • Context-Sensitive Design • Others…

  27. Traffic Calming "Traffic calming is the combination of mainly physical measures that reduce the negative effects of motor vehicle use, alter driver behavior and improve conditions for non-motorized street users." - ITE Subcommittee on Traffic Calming

  28. http://www.trafficcalming.org/measures2.html

  29. Roundabouts Traffic Circles http://www.trafficcalming.org/measures2.html

  30. Neckdowns Chicanes http://www.trafficcalming.org/measures2.html

  31. Narrow Street Scenarios 28’ 52-56’ 24’ 47-52’ 20’ 42-48’ http://darkwing.uoregon.edu/~cpw/projects/pdf/featured/tgm_2003/powerpoints/285,13,Narrow Street Scenarios

  32. Narrow Streets Canyon Rim Village, Medford http://darkwing.uoregon.edu/~cpw/projects/pdf/featured/tgm_2003/powerpoints/366,11,Narrow Streets

  33. Sustainable Streets…are rights of way designed and operated to create benefits relating to mobility, ecology and community that support a broad sustainability agenda... Marcy McInelly, SERA/Urbsworks

  34. Sustainable Street Design • Network design: alignment, sizing, connectivity • Allocation of right of way space • Component design: paving, landscape, lighting, furnishings • Sub-grade engineering and design Marcy McInelly, SERA/Urbsworks

  35. Beyond Street Design • Planning, Policy and Institutional Activities • Construction • Operations & Management • Maintenance, Restoration & Repair Marcy McInelly, SERA/Urbsworks

  36. Pillars of Sustainable Streets Movement Ecology Community Photo: Marcy McInelly, SERA/Urbsworks Marcy McInelly, SERA/Urbsworks

  37. Riverfront Parkway and Downtown Streets, Chattanooga, TN Roadway Modifications Image: City of Chattanooga and River City Company

  38. Riverfront Parkway, Chattanooga, TN “Before” Conditions Image: City of Chattanooga and River City Company

  39. Reconstructed Riverfront Parkway Image: City of Chattanooga

  40. http://www.completestreets.com/early.html

  41. https://bookstore.transportation.org/item_details.aspx?ID=110https://bookstore.transportation.org/item_details.aspx?ID=110

  42. “Context-Sensitive Design”

  43. Next up: Pavements

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