Abstract
This paper reports the results of a stated preference survey of regular transit users’ willingness to ride and concerns about driverless buses in the Philadelphia region. As automated technologies advance, driverless buses may offer significant efficiency, safety, and operational improvements over traditional bus services. However, unfamiliarity with automated vehicle technology may challenge its acceptance among the general public and slow the adoption of new technologies. Using a mixed logit modeling framework, this research examines which types of transit users are most willing to ride in driverless buses and whether having a transit employee on board to monitor the vehicle operations and/or provide customer service matters. Of the 891 surveyed members of University of Pennsylvania’s transit pass benefit program, two-thirds express a willingness to ride in a driverless bus when a transit employee is on board to monitor vehicle operations and provide customer service. By contrast, only 13% would agree to ride a bus without an employee on board. Males and those in younger age groups (18–34) are more willing to ride in driverless buses than females and those in older age groups. Findings suggest that, so long as a transit employee is onboard, many transit passengers will willingly board early generation automated buses. An abrupt shift to buses without employees on board, by contrast, will likely alienate many transit users.
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Acknowledgements
This research was supported by a grant from the U.S. Department of Transportation’s Dwight David Eisenhower Transportation Fellowship Program. Technologies for Safe and Efficient Transportation, a U.S. Department of Transportation University Research Center, also supported this research.
Authors’ contribution
XD: Literature review support, modeling and statistical analysis, writing and editing. MD: Design and management of survey, literature review, writing and editing. EG: Research design support, development of modeling framework, writing and editing.
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Appendix
Appendix
Table with full list of predictor variables included in the final models
Variables | Model 1 | Model 2 | Model 3 |
|---|---|---|---|
Coefficients (SE) | Coefficients (SE) | Coefficients (SE) | |
Uncertain | |||
Male | 0.193 (0.135) | 0.875 (0.228)*** | 0.386 (0.215) |
Income $50,000–$99,999 | 0.272 (0.179) | 0.502 (0.265) | 0.304 (0.266) |
Income >$100,000 | 0.193 (0.186) | 0.575 (0.282)* | 0.170 (0.283) |
Age 35–44 | 0.293 (0.166) | 0.203 (0.259) | 0.436 (0.264) |
Age > 45 | −0.403 (0.151)** | −0.923 (0.242)*** | −0.718 (0.239)** |
Bus usage <2 days per week | 0.403 (0.123)** | 0.687 (0.196)*** | 0.655 (0.197)*** |
Transit usage < everyday | 0.179 (0.164) | 0.276 (0.242) | 0.366 (0.244) |
Employee monitoring operations and providing customer services | Not included | 1.781 (0.299)*** | 1.770 (0.298)*** |
Employee providing customer service but not necessarily monitoring operations | Not included | 2.774 (0.345)*** | 2.805 (0.343)*** |
Have heard of automated vehicle | Not included | Not included | 0.541 (0.237)* |
Concern about vehicle safety | Not included | Not included | −2.266 (0.393)*** |
Concern about lack of assistance for disabled passengers | Not included | Not included | −0.709 (0.206)*** |
Concern about access to information | Not included | Not included | −0.528 (0.205)** |
Intercept | −0.648 (0.170)*** | −2.336 (0.327)*** | −0.075 (0.435) |
Willing | |||
Male | 0.756 (0.126)*** | 2.173 (0.276)*** | 1.019 (0.260)*** |
Income $50,000–$99,999 | 0.186 (0.166) | 0.512 (0.330) | 0.228 (0.327) |
Income >$100,000 | 0.379 (0.171)* | 1.108 (0.351)** | 0.325 (0.347) |
Age 35–44 | −0.293 (0.161) | −0.886 (0.349)* | −0.451 (0.341) |
Age > 45 | −0.554 (0.140)*** | −1.595 (0.299)*** | −1.262 (0.291)*** |
Bus usage < 2 days per week | 0.200 (0.117) | 0.540 (0.250)* | 0.465 (0.247) |
Transit usage < Everyday | 0.053 (0.161) | 0.117 (0.314) | 0.425 (0.306) |
Employee monitoring operations and providing customer services | Not included | 4.860 (0.368)*** | 4.760 (0.365)*** |
Employee providing customer service but not necessarily monitoring operations | Not included | 4.451 (0.389)*** | 4.551 (0.388)*** |
Have heard of automated vehicle | Not included | Not included | 1.025 (0.308)*** |
Concern about vehicle safety | Not included | Not included | −5.914 (0.451)*** |
Concern about lack of assistance for disabled passengers | Not included | Not included | −0.812 (0.251)** |
Concern about access to information | Not included | Not included | −0.943 (0.255)*** |
Intercept | −0.173 (0.151) | −5.158 (0.454)*** | 0.246 (0.517) |
R 2 | 0.045 | 0.258 | 0.296 |
Log Likelihood | −2782 | −2161 | −2049 |
Significance levels | ‘***’0.001 | ‘**’0.01 | ‘*’0.05 |
Predicted responses from model 3 for all variables under different demographic characteristics, transit usage, and employee presence
Variables | Unwilling (%) | Uncertain (%) | Willing (%) |
|---|---|---|---|
All male | 33.1 | 26.0 | 40.9 |
All female | 37.3 | 27.8 | 34.9 |
All frequent bus riders | 38.6 | 24.4 | 36.9 |
All infrequent bus riders | 34.0 | 29.3 | 36.7 |
All frequent transit riders | 36.5 | 26.9 | 36.6 |
All infrequent transit riders | 33.6 | 28.6 | 37.8 |
All have heard of AV | 34.9 | 27.3 | 37.8 |
None has heard of AV | 40.1 | 27.1 | 32.8 |
All between age 18 and 34 | 33.6 | 25.3 | 41.1 |
All between age 35 and 44 | 31.9 | 33.6 | 34.5 |
All over age 45 | 40.2 | 24.6 | 35.2 |
Everyone has income below $50 K | 37.6 | 26.2 | 36.2 |
Everyone has income between $50 and 100 K | 35.4 | 28.4 | 36.1 |
Everyone has income over $100 K | 36.0 | 26.3 | 37.8 |
There is an employee onboard in all scenarios | 26.1 | 31.2 | 42.7 |
There is no employee onboard in any scenario | 54.3 | 23.7 | 22.0 |
There is no employee onboard to monitor and provide customer service in any scenarios | 21.6 | 20.9 | 57.5 |
Everyone is concerned about vehicle safety | 42.4 | 32.6 | 25.0 |
No one is concerned about vehicle safety | 40.4 | 30.0 | 29.6 |
Everyone is concerned about lack of assistance | 16.8 | 15.7 | 67.6 |
No one is concerned about lack of assistance | 38.7 | 25.6 | 35.7 |
Everyone is concerned about access to info | 33.1 | 28.9 | 38.0 |
Not concerned about access to info | 38.9 | 27.0 | 34.1 |
There is no employee onboard to monitor and provide customer service in any scenarios | 34.0 | 27.4 | 38.6 |
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Dong, X., DiScenna, M. & Guerra, E. Transit user perceptions of driverless buses. Transportation 46, 35–50 (2019). https://doi.org/10.1007/s11116-017-9786-y
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DOI: https://doi.org/10.1007/s11116-017-9786-y


