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Context Based Design and the Fate of the Arterial

Context Based Design and the Fate of the Arterial. Norman W. Garrick Ellen Greenberg. Context Based Design and the Fate of the Arterial. Thanks to CNU’s Transportation Task Force Members. Context Based Design and the Fate of the Arterial.

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Context Based Design and the Fate of the Arterial

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  1. Context Based Design and the Fate of the Arterial Norman W. Garrick Ellen Greenberg

  2. Context Based Design and the Fate of the Arterial Thanks to CNU’s Transportation Task Force Members

  3. Context Based Design and the Fate of the Arterial Images graciously provided by Community Design & Architecture, Meyer Mohaddes, Inc., Kimley-Horn Associates and Duany Plater-Zyberk

  4. hinking Beyond the Pavemen Bringing New Urbanism into the Street Design Mainstream Connecting to the Context Sensitive Design Movement

  5. Context Sensitive Design Focused on cross section at single point or single link Beyond CSD CNU / ITE Project • Focus on place -- context broadly defined • Includes network design

  6. Beyond CSD Context Sensitive Design • Applies conventional functional classification system and distinction between urban and rural environments CNU / ITE Project • Greater complexity in both thoroughfares and contexts

  7. Beyond CSD Context Sensitive Design • Often does not address transportation functions CNU / ITE Project • Transportation functions integral to design process

  8. CNU Transportation Task Force Context Based Design A framework for thoroughfare design • Define context • Specify a complete palette of thoroughfare types • Define correspondence between context and thoroughfare type • Bring network into the process

  9. Defining ContextThe Context Zones (CZ) CZ 1 – Natural CZ 2 – Rural CZ 3 – Suburban CZ 4 – General Urban CZ 5 – Urban Center CZ 6 – Urban Core

  10. Defining ContextThe Context Zones (CZ) CZ 3 – Suburban CZ 4 – General Urban CZ 5 – Urban Center CZ 6 – Urban Core

  11. Frontage Thoroughfare Pattern Building Height Building Orientation Land Use Mix Open Space Types Characterizing Context Zones (CZ)

  12. Example: Context Zone 4 CZ-4 General Urban

  13. Thoroughfare Names Context Based Design Context Based Design Nomenclature relates to the thoroughfare’s function as a place Conventional Design Nomenclature focuses on thoroughfare traffic moving function

  14. The Thoroughfare Types FREEWAY EXPRESSWAY/PARKWAY HIGHWAY URBAN ARTERIAL MULTIWAY BOULEVARD AVENUE CONNECTOR STREET STREET ROAD YIELD STREET MEWS/COURT/WOONERF ALLEY PATH/PASSAGE

  15. The Thoroughfare Types FREEWAY EXPRESSWAY/PARKWAY HIGHWAY URBAN ARTERIAL MULTIWAY BOULEVARD AVENUE CONNECTOR STREET STREET ROAD YIELD STREET MEWS/COURT/WOONERF ALLEY PATH/PASSAGE

  16. Defining Thoroughfare Type Size Target Speed Intersection Spacing Transit Design Pedestrian Design Bike Design Parking Access Control Building Frontage

  17. Defining Thoroughfare TypeThe Major Urban Thoroughfares

  18. Defining Thoroughfare TypeThe Major Urban Thoroughfares

  19. Defining Thoroughfare TypeThe Major Urban Thoroughfares

  20. Context Based Names and Functional Classification

  21. Principles of Context Based Thoroughfare Design • Confine high speed thoroughfares to edges of urban zones • Limit speed in urban areas • Limit thoroughfare size in urban areas • Maintain a dense network

  22. Compatibility Context and Thoroughfare Type Consistency of thoroughfare types with context zone “y” – permitted “x” – not permitted “p” – permitted provisionally with special treatment or edge condition

  23. Context and Thoroughfare Type“the matrix”

  24. The Arterial in Context Based Design Preferred Types in CZ-3, 4, 5 Multiway Boulevards Avenues Connector Streets Restricted Use Urban Arterials Expressways Prohibited Freeways

  25. The Multiway Boulevard

  26. The Multiway Boulevard Fully support urban character and activities High Traffic Volume 6 lanes total, 2 on local access roadway Target Speed 35 mph (20 mph local access) Intersection spacing 1/4 mile (1/8 mile local access) Curb Parking on local access Multimodal accommodations Building frontage

  27. The Avenue

  28. The Avenue Fully support urban character and activities Relatively High Traffic Volume Preferably 2 or less lanes Target Speed <30 mph Intersection spacing 1/8 to 1/4 mile Curb Parking Multimodal accommodations Building frontage

  29. The Urban Arterial

  30. The Urban Arterial Primary function is vehicle movement Used as an edge or boundary High Traffic Volume Target Speed 40 –45 mph Intersection spacing ¼ to ½ mile No Parking Limited multimodal accommodation No building frontage

  31. Is there a role for the Urban Arterial in NU?

  32. The AvenueHow large? 4 lanes or 6 lanes?

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