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American Planning  Association  - Washington Chapter 2009 Conference – Vancouver, Washington Transportation Connectivity
What is RDI? ,[object Object]
RDI is a superior and meaningful measure of transportation connectivity.,[object Object]
The RDI can be measured separately for motorized and non-motorized travel, taking into account non-motorized shortcuts, such as paths that connect cul-de-sacs, and barriers such as highways and streets that lack sidewalks.
A high RDI may indicate that streets are well connected with good sidewalks and blocks are likely relatively small so that people can travel more directly to destinations.
A low RDI may indicate that the street network has many unconnected dead-ends and blocks are large so people must travel farther to reach destinations.,[object Object]
 Growth Management
 Non-Motorized Concurrency and Quality of Service,[object Object],[object Object],[object Object],[object Object]
 Concurrency Program Refinements
 VMT and GHG per Capita Reduction
 Multi-Modal Level-of-Service (LOS)
 Street Connectivity Policies,[object Object]
Evaluating the benefits and effects of proposed pathways and sidewalk improvements is also impractical without software.
Existing proxy measures are inherently flawed and do not provide the accuracy and validity of an RDI analysis.  ,[object Object],[object Object],[object Object]
New Shared-Use Paths Shared-Use Path Connections Average RDI Score: 14 % improvement Fair / Good .66

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APA Washington RDI Presentation

  • 1. American Planning Association - Washington Chapter 2009 Conference – Vancouver, Washington Transportation Connectivity
  • 2.
  • 3.
  • 4. The RDI can be measured separately for motorized and non-motorized travel, taking into account non-motorized shortcuts, such as paths that connect cul-de-sacs, and barriers such as highways and streets that lack sidewalks.
  • 5. A high RDI may indicate that streets are well connected with good sidewalks and blocks are likely relatively small so that people can travel more directly to destinations.
  • 6.
  • 8.
  • 10. VMT and GHG per Capita Reduction
  • 12.
  • 13. Evaluating the benefits and effects of proposed pathways and sidewalk improvements is also impractical without software.
  • 14.
  • 15. New Shared-Use Paths Shared-Use Path Connections Average RDI Score: 14 % improvement Fair / Good .66
  • 16. RDI – “Before & After” Delta Shared-Use Path Connections
  • 17.