Accessibility of Proposed Bay AreaRail Transit Extensions:  An Evaluation of Opportunitiesfor Transit-Oriented Development...
Presentation Outline Study Background/Purpose Methodology Accessibility Results Policy Implications
Study Background Series of proposed actions in  MTC 2035 Transportation Plan Study focuses on extensions to  the intra-r...
Study Purpose Determine how accessible these extensions/stations  along extensions are   Accessibility serves as surroga...
Why Study Accessibility and TOD? Shift the paradigm from Automobility Planning to  Accessibility Planning (Cervero, 2000)...
Methodology Calculate an accessibility index   Compare relative accessibility of stations   Explore accessibility chang...
Alternative Network C                    A                    B   Configurations Accessibility compared  from present to ...
Systemwide Accessibility Increases  A                  B                   C 568.10             669.50             673.31 ...
Increases by Sub-Regional Area Type                                   Central City   Central City   Inner Ring     Outer R...
Accessibility         Average Accessibility Index by Network Configurationof New Lines                            A       ...
Share of Accessibility Generation                                                             Share of Growth             ...
Surrounding     Land Use Surrounding land use  can either support or  be obstacle to TOD Right: Agglomerated  map of Gen...
Implications: SiteTOD Opportunities One possible  interpretation:   (Index A + Index B +    Index C) * (1 - % Low    Den...
Implications: Prioritization of Extensions1. BART-Silicon Valley     Will receive 50 percent of                          ...
Conclusions Accessibility is just one, but a very important, factor  for TOD. Sites with highest potential are within cl...
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LTC, Jack R. Widmeyer Transportation Research Conference, Going to San Bernardino A Symposium on Intermodal Transit Stations and Transit-Oriented Design, 11/06/2009, Kevin Fang

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Kevin Fang; California Polytechnic State University

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LTC, Jack R. Widmeyer Transportation Research Conference, Going to San Bernardino A Symposium on Intermodal Transit Stations and Transit-Oriented Design, 11/06/2009, Kevin Fang

  1. 1. Accessibility of Proposed Bay AreaRail Transit Extensions: An Evaluation of Opportunitiesfor Transit-Oriented Development Kevin Fang California Polytechnic State University Presentation to theJack R. Widmeyer Transportation Research Conference California State University – San Bernardino November 6, 2009
  2. 2. Presentation Outline Study Background/Purpose Methodology Accessibility Results Policy Implications
  3. 3. Study Background Series of proposed actions in MTC 2035 Transportation Plan Study focuses on extensions to the intra-region commuter and heavy rail network BART to Silicon Valley eBART Caltrain to Downtown SF Dumbarton Rail
  4. 4. Study Purpose Determine how accessible these extensions/stations along extensions are Accessibility serves as surrogate for opportunities for transit-oriented development See how extensions enhance the overall accessibility of the entire regionwide network
  5. 5. Why Study Accessibility and TOD? Shift the paradigm from Automobility Planning to Accessibility Planning (Cervero, 2000) Issues with the current auto-oriented transportation and land use Environmental Economic Preferential Social Subsidization of public transportation Take advantage of investments when they are made
  6. 6. Methodology Calculate an accessibility index Compare relative accessibility of stations Explore accessibility changes with network expansion Index based off generalized gravity model Size of Attraction Accessibility = Distance Jobs surrogate as Size of Attraction Time based friction factor for Distance component
  7. 7. Alternative Network C A B Configurations Accessibility compared from present to future through analysis of 3 Alternative Network Configurations A – Current Network: Trunk and Branch B – Future Network #1: Loop and Branches C – Future Network #2: Loop, Cross-Link, and Branches Source: ESRI Shaded Relief Basemap, MTC
  8. 8. Systemwide Accessibility Increases A B C 568.10 669.50 673.31 +17.8% +0.6%---------- +18.5%--
  9. 9. Increases by Sub-Regional Area Type Central City Central City Inner Ring Outer Ring CBD Non-CBD Suburb Suburbs A BShare of Growth 37.5% 32.7% 25.9% 4.0% B C 0.9% 2.0% 96.4% 0.7% A C 36.1% 31.6% 28.4% 3.8%  Accessibility growth favors central cities/inner suburbs
  10. 10. Accessibility Average Accessibility Index by Network Configurationof New Lines A B C New stations on average 7.64 7.44 7.24 less accessible Average Accessibility Index and Ranks (out of 93) – Alt. C than existing stations eBART BART-Silicon Valley Index .52 Index 6.66 BART to Silicon Rank 84.9 Rank 39.3 Valley on Caltrain-Downtown. SF Dumbarton Rail average rank Index 2.62 Index .80 in upper half Rank 64 Rank 79.7 of stations
  11. 11. Share of Accessibility Generation Share of Growth Share of Accessibility Generation Attributable To Line Full Existing A Build C A C BART 90.56% 77.06% 4.20% eBART -- 0.49% 3.16% BART-Silicon Valley -- 9.35% 59.82% Caltrain 9.44% 10.99% 19.36% Caltrain-Downtown SF -- 1.94% 12.41% Dumbarton Rail -- 0.16% 1.04% Caltrain-Downtown SF station is not particularly accessible to other stations, but shows value as a large activity center accessible to nearby stations
  12. 12. Surrounding Land Use Surrounding land use can either support or be obstacle to TOD Right: Agglomerated map of General Plan Land Use Designations Surrounding Areas That Are Low Generalized Land Uses in Density Residential (1/2 Mile) the San Francisco Bay Area Source: ESRI Shaded Relief Basemap, MTC, ABAG
  13. 13. Implications: SiteTOD Opportunities One possible interpretation: (Index A + Index B + Index C) * (1 - % Low Density Residential) Source: ESRI Shaded Relief Basemap, MTC
  14. 14. Implications: Prioritization of Extensions1. BART-Silicon Valley  Will receive 50 percent of new systemwide accessibility  Jobs along line make it almost as important as entire Caltrain system in generating accessibility at other stations2. Caltrain-Downtown SF  1 station will generate 2 percent of systemwide accessibility3a. Dumbarton Rail  Lacks major job centers along/near line  Connectivity provides limited travel time benefits to major job centers3b. eBART  Lacks major job centers along/near line
  15. 15. Conclusions Accessibility is just one, but a very important, factor for TOD. Sites with highest potential are within close proximity to major activity centers Connectivity promotes accessibility if provide time savings to major activity centers Society can change outcome of outlying, less assessable stations with plans to transform stations with low showing into major activity centers, e.g. Pleasanton, Walnut Creek, etc

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