An Evaluation of Free-Floating Carsharing in Oakland
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AN EVALUATION OF FREE- FLOATING CARSHARING IN OAKLAND, CALIFORNIA ELLIOT MARTIN, PH.D. ALEXANDRA PAN SUSAN SHAHEEN, PH.D. UC BERKELEY TRANSPORTATION SUSTIANABILITY RESEARCH CENTER FINAL REPORT doi:10.7922/G2N014SJ JUNE 2020 Contents Acknowledgments ................................................................................................................... 6 Executive Summary ................................................................................................................. 7 Introduction .............................................................................................................................11 Shared Mobility Programs and Outreach in Low-Income Communities: Overview of Barriers to Usage and U.S.-Based Programs ........................................................................12 Barriers to Shared Mobility for Low-Income Communities ..............................................13 Spatial Barriers ................................................................................................................13 Financial Barriers .............................................................................................................14 Cultural Barriers ...............................................................................................................15 Operator-Specific Barriers ..............................................................................................16 Catalog of U.S.-Based Programs and Outreach ................................................................17 Summary of Insights from Previous Work .........................................................................25 Methodological Overview .......................................................................................................27 Survey Analysis Results ........................................................................................................30 Demographics .......................................................................................................................30 Adoption of GIG .....................................................................................................................33 Recent Trip Characteristics ...................................................................................................34 Day of week of most recent trip ..........................................................................................35 Monthly average mileage ...................................................................................................36 Trip Occupancy ..................................................................................................................36 Reason for selecting GIG ...................................................................................................41 Impact of GIG Car Share on Travel Behavior ........................................................................42 Impact of GIG Car Share on Vehicle Ownership ................................................................42 Impact of GIG Car Share on Miles Driven for Survey Respondents ...................................48 Impact of GIG Car Share on Total VMT Driven in Oakland ................................................49 Impact of GIG Car Share on Other Modes .........................................................................56 Summary and Discussion ......................................................................................................60 References ..............................................................................................................................62 Table of Figures Figure 1: Mode shift as a result of GIG ........................................................................................................ 9 Figure 2: Use of Public Transit and GIG Carsharing Together ................................................................... 10 Figure 3: HomeZone Growth of GIG .......................................................................................................... 28 Figure 4: Question Structure Evaluating Vehicles Shed ............................................................................ 29 Figure 5: Question Structure Evaluating Vehicles Suppressed ................................................................. 30 Figure 6: How pre-survey respondents heard about GIG ......................................................................... 33 Figure 7: Reasons why people joined GIG Car Share ................................................................................ 34 Figure 8: Outreach Events attended by Pre-survey respondents ............................................................. 34 Figure 9: Day of the week of most recent trip taken ................................................................................ 35 Figure 10: Monthly mileage estimates ...................................................................................................... 36 Figure 11: Number of travelers in most recent trip .................................................................................. 37 Figure 12: Purpose of most recent trip ...................................................................................................... 38 Figure 13: Miles driven on most recent trip .............................................................................................. 39 Figure 14: Most recent rental trip duration .............................................................................................. 40 Figure 15: Time of day when most recent trip was started ...................................................................... 41 Figure 16: Reasons for selecting GIG Car Share......................................................................................... 42 Figure 17: Current vehicle holdings of GIG survey respondents .............................................................. 43 Figure 18: Vehicles Shed Due to GIG Car Share ......................................................................................... 44 Figure 19: Vehicle Acquisition Plans before GIG Car Share ...................................................................... 46 Figure 20: Vehicle Purchase Plans within the Next 2 Years ...................................................................... 46 Figure 21: Vehicle holdings of respondents who suppressed vehicle purchase ...................................... 47 Figure 22: Contribution of Other Modes to Reduced Need to Acquire Vehicle ....................................... 48 Figure 23: Decrease in miles driven on personal vehicle(s) after joining GIG .......................................... 49 Figure 24: Frequency of use of other modes ............................................................................................. 57 Figure 25: Usage shift in modes as a result of GIG Car Share ................................................................... 58 Figure 26: Number of fewer trips taken on other modes due to GIG Car Share...................................... 58 Figure 27: Modes used in combination with GIG Car Share ..................................................................... 59 Figure 28: Impact of trips combining public transportation and GIG on usage of personal vehicles ..... 59 Table of Tables Table 1: Demographic Distributions ............................................................................................................ 8 Table 2: Shared Mobility Systems Programs Engaged in Low Income Outreach (1) ............................... 18 Table 3: Shared Mobility Systems Programs Engaged in Low Income Outreach (2) ............................... 19 Table 4: Shared Mobility Systems Programs Engaged in Low Income Outreach (3) ............................... 20 Table 5: Shared Mobility Systems Programs Engaged in Low Income Outreach (4) ............................... 21 Table 6: Shared Mobility Systems Programs Engaged in Low Income Outreach (5) ............................... 22 Table 7: Shared Mobility Systems Programs Engaged in Low Income Outreach (6) ............................... 23 Table 8: Shared Mobility Systems Programs Engaged in Low Income Outreach (7) ............................... 24 Table 9: Shared Mobility Systems Programs Engaged in Low Income Outreach (8) ............................... 25 Table 10: Demographic Distributions of Gender, Age, and Education ..................................................... 31 Table 11: Demographic Distributions of Income and Race/Ethnicity ...................................................... 32 Table 12: Estimated Miles Driven on Suppressed Vehicles ...................................................................... 52 Table 13: Summary of Estimated VMT Impacts under Baseline Assumptions ........................................ 54 Table 14: Sensitivity Analysis of Net Impacts by Personal Vehicle Suppression Miles ........................... 56 Acknowledgments The authors would like to thank a number of people who supported the development of this report. At the City of Oakland, we thank Michael Ford, Kerby Olsen, and Danielle Dai of the City of Oakland, as well as former staff members Sara Barz, Jaime Parks, and Michael Randolph. The authors would like to thank Jason Haight, Naila Ahmed, Dermot Hikisch, Hamza Khan, Sloane Morgan, and Tony Sifontes of AAA and GIG. Staff members at UC Berkeley also contributed to the development of this report, including Rachel Finson, Adam Stocker,