SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY Measuring Route-Level Accessibility: Applications to San Francisco Network Jennifer Ziebarth, Neema Nasir,

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Presentation transcript:

SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY Measuring Route-Level Accessibility: Applications to San Francisco Network Jennifer Ziebarth, Neema Nasir, Elizabeth Sall, Lisa Zorn TRB Planning Applications Conference May 9, 2013

SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY2 Route-level accessibility Many paths One path

Creating a bicycle route choice model SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY3 Hood, Sall, Charlton: “A GPS-based bicycle route choice model for San Francisco, California”. Transportation Letters (2011) 3: (63-75).

Route-level accessibility from Ferry Building SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY4

If we build it … they will run away?? SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY5

Routes are correlated with each other SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY6

It all comes down to the pathsize correction SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY7 Path utilityPathsize correction BeforeAfterBeforeAfter

Valencia paradox SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY8 BeforeAfter

Bierlaire and Frejinger SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY9

Pathsize Penalty algorithm SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY10 Path 1Path 3Path 2

Sensitivity testing, revisited SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY11

One path versus many SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY12 1 path5 paths10 paths

SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY Thank you! Special thanks to: Elizabeth Sall, Lisa Zorn, Neema Nassir, Jeff Hood, John Bowman, Dan Tischler, Alireza Khani