Measuring Route-Level Accessibility: Applications to San Francisco Network
description
Transcript of Measuring Route-Level Accessibility: Applications to San Francisco Network
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 ConferenceMay 9, 2013
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
2
Route-level accessibility
Many paths One path
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
3
Creating a bicycle route choice model
Hood, Sall, Charlton: “A GPS-based bicycle route choice model for San Francisco, California”. Transportation Letters (2011) 3: (63-75).
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
4
Route-level accessibility from Ferry Building
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
5
If we build it … they will run away??
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
6
Routes are correlated with each other
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
7
It all comes down to the pathsize correction
Path utility Pathsize correction
Before After Before After
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
8
Valencia paradox
Before After
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
9
Bierlaire and Frejinger
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
10
Pathsize Penalty algorithm
Path 1 Path 3Path 2
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
11
Sensitivity testing, revisited
SAN FRANCISCO COUNTY TRANSPORTATION AUTHORITY
12
One path versus many
1 path 5 paths 10 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