Our Experts

Journal Articles

1. Farzana Khatun and Jean-Daniel Saphores (2025) “Free transit for students to regain ridership: Users and boarding characteristics of LA Metro's GoPass program”, Journal of Transport Geography, 129, p. 104442. Available at: 10.1016/j.jtrangeo.2025.104442. [ITS-Irvine record]
2. Farzana Khatun and Jean-Daniel Saphores (2025) “Driver’s Licenses for Undocumented Immigrants and Bus Ridership in Orange County, California”, Transportation Research Record, 2679(6), pp. 409–425. Available at: 10.1177/03611981251318344. [ITS-Irvine record]
3. Md Rabiul Islam and Jean-Daniel M. Saphores (2025) “WILL COVID-19 jump-start telecommuting? Evidence from California”, Transportation, 52(1), pp. 349–380. Available at: 10.1007/s11116-023-10424-x. [ITS-Irvine record]
4. Monica Ramirez-Ibarra and Jean-Daniel M. Saphores (2024) “Lane Management Strategies in a Connected Environment: Analysis of Freight Corridor Scenarios for I-710 in Southern California”, Transportation Research Record: Journal of the Transportation Research Board, 2678(2), pp. 620–634. Available at: 10.1177/03611981231175903. [ITS-Irvine record]
5. Lu Xu and Jean-Daniel Saphores (2024) “Does <i>e</i>-shopping impact household travel? Evidence from the 2017 U.S. NHTS”, Journal of Transport Geography, 115, p. 103827. Available at: 10.1016/j.jtrangeo.2024.103827. [ITS-Irvine record]
6. Yunwen Feng, Jean-Daniel Saphores, Hilary Nixon and Monica Ramirez-Ibarra (2024) “Battery Electric Vehicles: Travel Characteristics of Early Adopters”, Sustainability, 16(10), p. 4263. Available at: 10.3390/su16104263. [ITS-Irvine record]
7. Farzana Khatun and Jean-Daniel Saphores (2023) “Covid-19, intentions to change modes, and how they materialized - Results from a random survey of Californians”, Transportation Research Part A: Policy and Practice, 178, p. 103882. Available at: 10.1016/j.tra.2023.103882. [ITS-Irvine record]
8. Arash Ghaffar, Michael Hyland and Jean-Daniel Saphores (2023) “Meta-analysis of shared micromobility ridership determinants”, Transportation Research Part D: Transport and Environment, 121, p. 103847. Available at: 10.1016/j.trd.2023.103847. [ITS-Irvine record]
9. Monica Ramirez-Ibarra and Jean-Daniel M. Saphores (2023) “1,000 HP electric drayage trucks as a substitute for new freeway lanes construction”, Transportation Research Part A: Policy and Practice, 171, p. 103646. Available at: 10.1016/j.tra.2023.103646. [ITS-Irvine record]
10. Monica Ramirez-Ibarra and Jean-Daniel M. Saphores (2023) “Health and equity impacts from electrifying drayage trucks”, Transportation Research Part D: Transport and Environment, 116, p. 103616. Available at: 10.1016/j.trd.2023.103616. [ITS-Irvine record]
11. Lu Xu and Jean-Daniel Saphores (2022) “Grocery shopping in California and COVID-19: Transportation, environmental justice, and policy implications”, Transportation Research Part D: Transport and Environment, 113, p. 103537. Available at: 10.1016/j.trd.2022.103537. [ITS-Irvine record]
12. Md Rabiul Islam and Jean-Daniel M. Saphores (2022) “An L.A. story: The impact of housing costs on commuting”, Journal of Transport Geography, 98(C). Available at: 10.1016/j.jtrangeo.2021.103266. [ITS-Irvine record]
13. Farzana Khatun and Jean-Daniel M. Saphores (2022) “Best frenemies? A characterization of TNC and transit users”, Journal of Public Transportation, 24, p. 100029. Available at: 10.1016/j.jpubtr.2022.100029. [ITS-Irvine record]
14. Jean-Daniel Saphores and Lu Xu (2021) “E-shopping changes and the state of E-grocery shopping in the US - Evidence from national travel and time use surveys”, Research in Transportation Economics, 87, p. 100864. Available at: 10.1016/j.retrec.2020.100864. [ITS-Irvine record]
15. Suman K. Mitra and Jean-Daniel M. Saphores (2020) “How do they get by without cars? An analysis of travel characteristics of carless households in California”, Transportation, 47(6), pp. 2837–2858. Available at: 10.1007/s11116-019-09994-6. [ITS-Irvine record]
16. D. B. Howard, R. Soria, J. Thé, R. Schaeffer and J. -D. Saphores (2020) “The energy-climate-health nexus in energy planning: A case study in Brazil”, Renewable and Sustainable Energy Reviews, 132, p. 110016. Available at: 10.1016/j.rser.2020.110016. [ITS-Irvine record]
17. Jean-Daniel Saphores and Suman K. Mitra (2019) “Carless in california: What the carless can tell us about shifting behaviors and improving mobility”, Transfers Magazine, (4), p. 6p. Available at: https://transfersmagazine.org/wp-content/uploads/sites/13/2019/11/Nov2019_Transfers_Saphores.pdf. [ITS-Irvine record]
18. Suman K. Mitra and Jean-Daniel M. Saphores (2019) “Why do they live so far from work? Determinants of long-distance commuting in California”, Journal of Transport Geography, 80, p. 102489. Available at: 10.1016/j.jtrangeo.2019.102489. [ITS-Irvine record]
19. Farzana Khatun and Jean-Daniel Saphores (2019) “DON'T HOP in the bus GUS – an analysis of recent trends in octa (Orange county transit authority) bus ridership (2nd highest scoring doctoral abstract award sponsored by the transport & health science group)”, Journal of Transport & Health, 14, p. 100784. Available at: 10.1016/j.jth.2019.100784. [ITS-Irvine record]
20. Daniel B. Howard, Jesse Thé, Rafael Soria, Neal Fann, Roberto Schaeffer and Jean-Daniel M. Saphores (2019) “Health benefits and control costs of tightening particulate matter emissions standards for coal power plants - The case of Northeast Brazil”, Environment International, 124, pp. 420–430. Available at: 10.1016/j.envint.2019.01.029. [ITS-Irvine record]
21. Amrita Singh, Jean-Daniel Saphores and Tim Bruckner (2018) “A spatial hedonic analysis of the housing market around a large, failing desert lake: The case of the Salton Sea in California”, Journal of Environmental Planning and Management, 61(14), pp. 2549–2569. Available at: 10.1080/09640568.2017.1405799. [ITS-Irvine record]
22. Kathrin Kuhne, Suman K. Mitra and Jean-Daniel M. Saphores (2018) “Without a ride in car country – A comparison of carless households in Germany and California”, Transportation Research Part A: Policy and Practice, 109, pp. 24–40. Available at: 10.1016/j.tra.2018.01.021. [ITS-Irvine record]
23. Suman K. Mitra and Jean-Daniel M. Saphores (2017) “Carless in California: Green choice or misery?”, Journal of Transport Geography, 65, pp. 1–12. Available at: 10.1016/j.jtrangeo.2017.09.016. [ITS-Irvine record]
24. K.S. Nesamani, Jean-Daniel Saphores, Michael G. McNally and R. Jayakrishnan (2017) “Estimating impacts of emission specific characteristics on vehicle operation for quantifying air pollutant emissions and energy use”, Journal of Traffic and Transportation Engineering (English Edition), 4(3), pp. 215–229. Available at: 10.1016/j.jtte.2017.05.007. [ITS-Irvine record]
25. Suman K. Mitra and Jean-Daniel M. Saphores (2016) “The value of transportation accessibility in a least developed country city – The case of Rajshahi City, Bangladesh”, Transportation Research Part A: Policy and Practice, 89, pp. 184–200. Available at: 10.1016/j.tra.2016.05.002. [ITS-Irvine record]
26. K. Jo Min, Jean-Daniel Saphores and Valerie M. Thomas (2016) “Introduction: Special issue on engineering economics and sustainable systems”, The Engineering Economist, 61(3), pp. 161–162. Available at: 10.1080/0013791x.2016.1213342. [ITS-Irvine record]
27. Tammie Kuo and Jean-Daniel Saphores (2016) “Analysis of health impacts resulting from truck and rail emissions reductions in the San Pedro bay ports”, Journal of Transport & Health, 3(2), pp. S32–S33. Available at: 10.1016/j.jth.2016.05.078. [ITS-Irvine record]
28. Harya S. Dillon, Jean-Daniel Saphores and Marlon G. Boarnet (2015) “The impact of urban form and gasoline prices on vehicle usage: Evidence from the 2009 National Household Travel Survey”, Research in Transportation Economics, 52, pp. 23–33. Available at: 10.1016/j.retrec.2015.10.006. [ITS-Irvine record]
29. Tammie Kuo and Jean-Daniel Saphores (2015) “A06 San Pedro bay ports clean air analysis”, Journal of Transport & Health, 2(2), p. S8. Available at: 10.1016/j.jth.2015.04.494. [ITS-Irvine record]
30. Wei Li, Jean-Daniel M. Saphores and Thomas W. Gillespie (2015) “A comparison of the economic benefits of urban green spaces estimated with NDVI and with high-resolution land cover data”, Landscape Urban Plann., 133, pp. 105–117. Available at: 10.1016/j.landurbplan.2014.09.013. [ITS-Irvine record]
31. Jean-Daniel M. Saphores and Hilary Nixon (2014) “How effective are current household recycling policies? Results from a national survey of U.S. households”, Resources, Conservation and Recycling, 92, pp. 1–10. Available at: 10.1016/j.resconrec.2014.08.010. [ITS-Irvine record]
32. Hsin-Ping Hsu and Jean-Daniel Saphores (2013) “Impacts of parental gender and attitudes on children's school travel mode and parental chauffeuring behavior: Results for California based on the 2009 National Household Travel Survey”, Transportation, 41(3), pp. 543–565. Available at: 10.1007/s11116-013-9500-7. [ITS-Irvine record]
33. Natalia Milovantseva and Jean-Daniel Saphores (2013) “E-waste bans and U.S. households' preferences for disposing of their e-waste”, Journal of Environmental Management, 124, pp. 8–16. Available at: 10.1016/j.jenvman.2013.03.019. [ITS-Irvine record]
34. Stanley B. Grant, Tim D. Fletcher, David Feldman, Jean-Daniel Saphores, Perran L.M. Cook, Mike Stewardson, Kathleen Low, Kristal Burry and Andrew J. Hamilton (2013) “Adapting urban water systems to a changing climate: Lessons from the millennium drought in southeast Australia”, Environmental Science & Technology, 47(19), pp. 10727–10734. Available at: 10.1021/es400618z. [ITS-Irvine record]
35. Natalia Milovantseva and Jean-Daniel Saphores (2013) “Time bomb or hidden treasure? Characteristics of junk TVs and of the US households who store them”, Waste Management (Oxford), 33(3), pp. 519–529. Available at: 10.1016/j.wasman.2012.07.020. [ITS-Irvine record]
36. Carl W Lam, Seong-Rin Lim, Oladele A Ogunseitan, Andrew A Shapiro, Jean-Daniel M Saphores, Andrew Brock and Julie M Schoenung (2013) “Integrating toxicity reduction strategies for materials and components into product design: A case study on utility meters”, Integrated environmental assessment and management, 9(2), pp. 319–328. Available at: 10.1002/ieam.1384. [ITS-Irvine record]
37. Gunwoo Lee, Soyoung (Iris) You, Stephen G. Ritchie, Jean-Daniel Saphores, R. Jayakrishnan and Oladele Ogunseitan (2012) “Assessing air quality and health benefits of the Clean Truck Program in the Alameda corridor, CA”, Transportation Research Part A: Policy and Practice, 46(8), pp. 1177–1193. Available at: 10.1016/j.tra.2012.05.005. [ITS-Irvine record]
38. Jean-Daniel Saphores and Wei Li (2012) “Estimating the value of urban green areas: A hedonic pricing analysis of the single family housing market in Los Angeles, CA”, Landscape Urban Plann., 104(3-4), pp. 373–387. Available at: 10.1016/j.landurbplan.2011.11.012. [ITS-Irvine record]
39. Jean-Daniel M. Saphores, Oladele A. Ogunseitan and Andrew A. Shapiro (2012) “Willingness to engage in a pro-environmental behavior: An analysis of e-waste recycling based on a national survey of U.S. households”, Resources, Conservation and Recycling, 60, pp. 49–63. Available at: 10.1016/j.resconrec.2011.12.003. [ITS-Irvine record]
40. Stephanie Pincetl, Thomas Gillespie, Diane E. Pataki, Sassan Saatchi and Jean-Daniel Saphores (2012) “Urban tree planting programs, function or fashion? Los Angeles and urban tree planting campaigns”, GeoJournal, 78(3), pp. 475–493. Available at: 10.1007/s10708-012-9446-x. [ITS-Irvine record]
41. Wei Li and Jean-Daniel Saphores (2012) “Assessing impacts of freeway truck traffic on residential property values. Southern California Case Study”, Transportation Research Record, 2288(1), pp. 48–56. Available at: 10.3141/2288-06. [ITS-Irvine record]
42. Wei Li and Jean-Daniel Saphores (2011) “A spatial hedonic analysis of the value of urban land cover in the multifamily housing market in Los angeles, CA”, Urban Studies, 49(12), pp. 2597–2615. Available at: 10.1177/0042098011429486. [ITS-Irvine record]
43. Mei-Ting Tsai, Jean-Daniel Saphores and Amelia Regan (2011) “Valuation of freight transportation contracts under uncertainty”, Transportation Research Part E: Logistics and Transportation Review, 47(6), pp. 920–932. Available at: 10.1016/j.tre.2011.03.005. [ITS-Irvine record]
44. Thomas Welch Gillespie, Stephanie Pincetl, Shea Brossard, Jenny Smith, Sassan Saatchi, Diane Pataki and Jean-Daniel Saphores (2011) “A time series of urban forestry in Los Angeles”, Urban ecosystems, 15(1), pp. 233–246. Available at: 10.1007/s11252-011-0183-6. [ITS-Irvine record]
45. Ajay Garde, Jean-Daniel Saphores, Richard Matthew and Kristen Day (2010) “Sustainable neighbourhood development: Missed opportunities in southern California”, Environment and planning. B, Planning & design, 37(3), pp. 387–407. Available at: 10.1068/b35098. [ITS-Irvine record]
46. Soyoung (Iris) You, Gunwoo Lee, Stephen G. Ritchie, Jean-Daniel Saphores, Mana Sangkapichai and Roberto Ayala (2010) “Air pollution impacts of shifting freight from truck to rail at California's San Pedro bay ports”, Transportation Research Record, 2162(1), pp. 25–34. Available at: 10.3141/2162-04. [ITS-Irvine record]
47. Ismael Aguilar-Benitez and Jean-Daniel Saphores (2009) “Public accountability and performance of two border water utilities”, Water policy : official journal of the World Water Council, 12(2), pp. 203–219. Available at: 10.2166/wp.2009.032. [ITS-Irvine record]
48. Mei-Ting Tsai, Amelia Regan and Jean-Daniel Saphores (2009) “Freight Transportation Derivatives Contracts: State of the Art and Future Developments”, Transportation Journal, 48(4), pp. 7–19. Available at: 10.2307/25702539. [ITS-Irvine record]
49. Hilary Nixon and Jean-Daniel M. Saphores (2009) “Information and the decision to recycle: Results from a survey of US households”, Journal of Environmental Planning and Management, 52(2), pp. 257–277. Available at: 10.1080/09640560802666610. [ITS-Irvine record]
50. Gunwoo Lee, Soyoung (Iris) You, Stephen G. Ritchie, Jean-Daniel Saphores, Mana Sangkapichai and R. Jayakrishnan (2009) “Environmental impacts of a major freight corridor. A Study of I-710 in California”, Transportation Research Record, 2123(1), pp. 119–128. Available at: 10.3141/2123-13. [ITS-Irvine record]
51. Mana Sangkapichai and Jean-Daniel Saphores (2008) “Why are Californians interested in hybrid cars?”, Journal of Environmental Planning and Management, 52(1), pp. 79–96. Available at: 10.1080/09640560802504670. [ITS-Irvine record]
52. Jean-Daniel M. Saphores (2008) “Environmental uncertainty and the timing of environmental policy”, Natural Resource Modeling, 17(2), pp. 163–190. Available at: 10.1111/j.1939-7445.2004.tb00132.x. [ITS-Irvine record]
53. Ajay Garde, Jean-Daniel Saphores, Richard Matthew and Kris Day (2008) “Missing opportunity for sustainable neighborhood development in southern ca.?”, ENERGY EFFICIENT AND ENVIRONMENTALLY COMPATIBLE CIVIL INFRASTRUCTURE SYSTEMS, p. 983. [ITS-Irvine record]
54. Hilary Nixon and Jean-Daniel Saphores (2007) “Impacts of motor vehicle operation on water quality in the US – Cleanup costs and policies”, Transportation Research Part D: Transport and Environment, 12(8), pp. 564–576. Available at: 10.1016/j.trd.2007.08.002. [ITS-Irvine record]
55. Jean-Daniel M. Saphores, Hilary Nixon, Oladele A. Ogunseitan and Andrew A. Shapiro (2007) “California households' willingness to pay for `green' electronics”, Journal of Environmental Planning and Management, 50(1), pp. 113–133. Available at: 10.1080/09640560601048549. [ITS-Irvine record]
56. Jean-Daniel M. Saphores and Marlon G. Boarnet (2006) “Uncertainty and the timing of an urban congestion relief investment.”, Journal of Urban Economics, 59(2), pp. 189–208. Available at: 10.1016/j.jue.2005.04.003. [ITS-Irvine record]
57. Jean-Daniel M. Saphores (2005) “The density of bounded diffusions”, Economics Letters, 86(1), pp. 87–93. Available at: 10.1016/j.econlet.2004.06.012. [ITS-Irvine record]
58. Jean-Daniel Saphores (2003) “Environment, land use and urban policy.”, Transportation Research Part A: Policy and Practice, 37(2), pp. 183–186. Available at: 10.1016/s0965-8564(02)00037-x. [ITS-Irvine record]
59. Arnim H. Meyburg, Jean-Daniel M. Saphores and Richard E. Schuler (1998) “The economic impacts of a divisible-load permit system for heavy vehicles”, Transportation Research Part A: Policy and Practice, 32(2), pp. 115–127. Available at: 10.1016/s0965-8564(97)88591-6. [ITS-Irvine record]

Conference Papers

1. Shakib Kafashan and Jean-Daniel Saphores (2025) “Electrification of Off-Road Construction Vehicles: A Comparative Economic Analysis of Electric and Diesel Machinery”, in Proceedings, 104th Annual Meeting of the Transportation Research Board. Washington D.C.. [ITS-Irvine record]
2. Farzana Khatun and Jean-Daniel Saphores (2024) “Driver’s License for Undocumented Immigrants and Bus Ridership in Orange County, CA”. Transportation Research Board 103rd Annual Meeting. [ITS-Irvine record]
3. Md Islam and Jean-Daniel Saphores (2024) “Two Rode, But Not Together: Gender Commuting Trade-Offs in Two-Worker Households”. Transportation Research Board 103rd Annual Meeting. [ITS-Irvine record]
4. Bumsub Park and Jean-Daniel Saphores (2024) “Restaurant Food Consumption in the Time of the Pandemic - A California Case Study”. Transportation Research Board 103rd Annual Meeting. [ITS-Irvine record]
5. Farzana Khatun and Jean-Daniel Saphores (2023) “The Impact of Covid-19 on Transit, Walking/Biking, and TNC Use in California – How Will Californians Travel after the Pandemic?”. 102nd Transportation Research Board Annual Meeting 2023. [ITS-Irvine record]
6. Monica Ramirez-Ibarra and Jean-Daniel Saphores (2023) “Lane Management Strategies in A Connected Environment: Analysis of Freight Corridor Scenarios for I-170 in Southern California”, in 102nd Annual Meeting of the Transportation Research Board, Washington, D.C.. [ITS-Irvine record]
7. Md Rabiul Islam and Jean-Daniel Saphores (2022) “An L.A. Story: Impacts of Land Use and Housing Costs on Commuting”. 101st Annual Meeting of the Transportation Research Board. [ITS-Irvine record]
8. Bumsub Park and Jean-Daniel M. Saphores (2021) “What is the Optimal Fleet Size for Online Food Delivery Companies?– An Application to San Francisco”. Transportation Research Board 100th Annual Meeting. Available at: https://trid.trb.org/view/1759433 (Accessed: October 11, 2023). [ITS-Irvine record]
9. Farzana Khatun and Jean-Daniel Saphores (2021) “Best Frennemies? A Characterization of TNC and Transit Users Based on the 2017 NHTS”. 100th Transportation Research Board (TRB) Annual Meeting, Washington, DC. [ITS-Irvine record]
10. Lu Xu and Jean-Daniel Saphores (2021) “DOES ONLINE SHOPPING REDUCE TRAVEL? Evidence from the 2017 National Household Travel Survey”. 100th Transportation Research Board (TRB) Annual Meeting, Washington, DC. [ITS-Irvine record]
11. Suman K. Mitra and Jean-Daniel M. Saphores (2019) “How do they get by without cars in california?: Travel characteristics of voluntarily and involuntarily carless households”, in Proceedings of the 98th annual meeting of the transportation research board, p. 7p. [ITS-Irvine record]
12. Farzana Khatun and Jean-Daniel Saphores (2019) “DON'T HOP in the bus GUS–an analysis of recent trends in octa (Orange county transit authority) bus ridership (2nd highest scoring doctoral abstract award sponsored by the transport & health science group)”, in 5th international conference on transportation and health. ICTH. [ITS-Irvine record]
13. Kathrin Kuehne, Suman K. Mitra and Jean-Daniel M. Saphores (2018) “Carless in car heaven: A comparison of German and Californian households”, in Proceedings of the 97th annual meeting of the transportation research board, p. 18p. [ITS-Irvine record]
14. Ke Wang and Jean-Daniel M. Saphores (2018) “An approximate least-square Monte-Carlo algorithm for solving the multi-period continuous network design problem”, in Proceedings of the 97th annual meeting of the transportation research board, p. 18p. [ITS-Irvine record]
15. Harya S. Dillon and Jean-Daniel Saphores (2017) “Incentives to promote household ownership of alternative fuel vehicles: Effectiveness and unintended effects”, in Proceedings of the 96th annual meeting of the transportation research board, p. 17p. [ITS-Irvine record]
16. Ankoor Bhagat, Jean-Daniel Saphores and R. Jayakrishnan (2017) “Detecting changes in accident rates using a hierarchical Bayesian approach: An application to the I-710 and the implementation of the PierPASS program”, in Proceedings of the 96th annual meeting of the transportation research board, p. 18p. [ITS-Irvine record]
17. Suman K. Mitra and Jean-Daniel M. Saphores (2017) “Determinants of long-distance commuting: Evidence from the 2012 California household travel survey”, in Proceedings of the 96th annual meeting of the transportation research board, p. 19p. [ITS-Irvine record]
18. Suman K. Mitra and Jean-Daniel M. Saphores (2016) “Exploring the unnoticed: An analysis of voluntary and involuntary carless households in California”, in Proceedings of the 95th annual meeting of the transportation research board, p. 20p. [ITS-Irvine record]
19. Harya S. Dillon, Jean-Daniel Saphores and Marlon Boarnet (2016) “A SEM analysis of the impact of urban form and gasoline prices on vehicle use: An application to southern California”, in Proceedings of the 95th annual meeting of the transportation research board, p. 19p. [ITS-Irvine record]
20. Bill Tomlinson, Bonnie Nardi, Donald J. Patterson, Ankita Raturi, Debra Richardson, Jean-Daniel Saphores and Dan Stokols (2015) “Toward alternative decentralized infrastructures”, in Proceedings of the 2015 annual symposium on computing for development - DEV '15. ACM Press, pp. 33–40. Available at: 10.1145/2830629.2830648. [ITS-Irvine record]
21. Ankoor Bhagat, Jean-Daniel Saphores and R. Jayakrishnan (2015) “Environmental and health impacts of shifting drayage truck operations to off-peak hours: An analysis of the PierPASS program in southern California”, in Proceedings of the 94th annual meeting of the transportation research board, p. 18p. Available at: https://trid.trb.org/view/1339096. [ITS-Irvine record]
22. Suman K. Mitra and Jean-Daniel M. Saphores (2015) “Transportation accessibility and multi-unit residential property rents - the case of rajshahi city, Bangladesh”, in Proceedings of the 94th annual meeting of the transportation research board, p. 22p. [ITS-Irvine record]
23. Ankoor Bhagat, Ke Wang, R. Jayakrishnan and Jean-Daniel Saphores (2015) “Schemes to expand origin-destination estimation results for microscopic simulation to an extended network”, in Proceedings of the 94th annual meeting of the transportation research board, p. 16p. [ITS-Irvine record]
24. Ankoor Bhagat, Jean-Daniel Saphores, R. Jayakrishnan and Jaeyoung Jung (2014) “An analysis of air pollution impacts from PierPASS in the alameda corridor, California”, in Proceedings of the 93rd annual meeting of the transportation research board, p. 17p. [ITS-Irvine record]
25. Ankoor Bhagat, J.D. Saphores, R. Jayakrishnan and J. Jung (2013) “An analysis of air pollution impacts from PierPASS in the alameda corridor, California”, in Proceedings of the 5th METRANS international urban freight conference (INUF), long beach, CA. [ITS-Irvine record]
26. Hsin-Ping Hsu and Jean-Daniel Saphores (2013) “Impacts of parental gender and attitudes on children's school travel mode and parental escort behavior”, in Proceedings of the 92nd annual meeting of the transportation research board, p. 22p. [ITS-Irvine record]
27. Jean-Daniel Saphores and Chung-Cheng Yeh (2012) “The impact of a new mass rapid transit system on residential property values - the case of kaohsiung, taiwan”, in . Mak, HY and Lo, HK (ed.) Transportation & logistics management. HONG KONG SOC TRANSPORTATION STUDIES LTD, pp. 89–96. [ITS-Irvine record]
28. Ankoor Bhagat, Jean-Daniel Saphores and R. Jayakrishnan (2012) “An analysis of the timing of truck and car accidents in a busy freight corridor”, in Proceedings of the 91st annual meeting of the transportation research board, p. 16p. [ITS-Irvine record]
29. Jean-Daniel Saphores and Chung-Cheng Yeh (2012) “Time on market and the impact of a mass rapid transit system on residential property values-The case of Kaohsiung, Taiwan”, in Proceedings of the 87th annual conference of the WEAI, San Francisco, CA. [ITS-Irvine record]
30. Jean-Daniel Saphores and Hilary Nixon (2012) “US household preferences for alternative-fuel vehicles: Results from a national survey”, in Proceedings of the 91st annual meeting of the transportation research board, p. 18p. [ITS-Irvine record]
31. Carl W. Lam, Seong-Rin Lim, Oladele A. Ogunseitan, Andrew A. Shapiro, Jean-Daniel M. Saphores, Andrew Brock and Julie M. Schoenung (2011) “Toxicity potential indicator analysis for alternatives recommendations in the RIO Tronics utility meter pulse products”, in Proceedings of the 2011 IEEE international symposium on sustainable systems and technology. IEEE. Available at: 10.1109/issst.2011.5936909. [ITS-Irvine record]
32. Lima Kopitch and Jean-Daniel Saphores (2011) “Assessing effectiveness of changeable message signs on secondary crashes”, in Proceedings of the 90th annual meeting of the transportation research board, p. 16p. [ITS-Irvine record]
33. Roberto Ayala and Jean-Daniel Saphores (2011) “Impact of state and local incentives on household ownership of hybrid electric vehicles: Results from 2009 national household travel survey”, in Proceedings of the 90th annual meeting of the transportation research board, p. 16p. [ITS-Irvine record]
34. Hilary Nixon and Jean-Daniel Saphores (2011) “Understanding household preferences for alternative-fuel vehicle technologies”, in ACSP 51st annual conference in minneapolis, minnesota. [ITS-Irvine record]
35. Roberto Ayala and Jean-Daniel Saphores (2011) “The effectiveness of state and local incentives on household ownership of hybrid electric vehicles: Results from the 2009 national household travel survey”, in Proceedings of the TRB workshop using national household travel survey data for transportation decision making, the keck center of the national academies, washington DC, june 6, 2011. [ITS-Irvine record]
36. Jean-Daniel Saphores and W. Li (2010) “Estimating the benefits of urban forests in Los Angeles – a spatial hedonic analysis of the multifamily housing market”, in 85th annual conference of the WEAI, Portland, OR. [ITS-Irvine record]
37. Gunwoo Lee, Mana Sangkapichai, Stephen G. Ritchie, Jean-Daniel Saphores, Oladele Ogunseitan, Roberto Ayala, R. Jayakrishnan and Rodolfo Torres (2010) “Assessing the environmental and health impacts of port-related freight movement in a major urban transportation corridor”, in Proceedings of the 89th annual meeting of the transportation research board, p. 15p. [ITS-Irvine record]
38. Roberto Ayala, Jean-Daniel Saphores, Stephen G. Ritchie, Gunwoo Lee and Mana Sangkapichai (2010) “A preliminary analysis of the environmental impacts of the clean truck program in the alameda corridor, California”, in Proceedings of the 89th annual meeting of the transportation research board, p. 16p. [ITS-Irvine record]
39. Mana Sangkapichai, Jean-Daniel Saphores, Oladele Ogunseitan, Stephen G. Ritchie and Gunwoo Lee (2010) “An analysis of health impacts from PM and NOx emissions resulting from train operations in the alameda corridor, California”, in Proceedings of the 89th annual meeting of the transportation research board, p. 19p. [ITS-Irvine record]
40. J. Saphores and W. Li (2009) “Estimating the benefits of urban forests - an application to the Los Angeles (CA) single family housing market”, in Proceedings of the 50th anniversary ACSP conference, in crystal city, virginia. [ITS-Irvine record]
41. J. Saphores, M. Sangkapichai, S. Ritchie, G. Lee, I. You and R. Ayala (2009) “An analysis of train emissions and their health impacts in California's alameda corridor”, in Proceedings of INFORMS, san diego, CA. [ITS-Irvine record]
42. J. Saphores (2009) “Building sustainability indicators for Los Angeles”, in Proceedings of CIC's 7 th annual conference, bellevue, washington. [ITS-Irvine record]
43. M. Sangkapichai, J-D Saphores, S. Ritchie, S. You and G. Lee (2009) “Estimating PM and NOx train emissions in the alameda corridor, California”, in Proceedings of the 88th meeting of the transportation research board, washington D.C. [ITS-Irvine record]
44. G. Lee, S. You, S.G. Ritchie, J. Saphores, M. Sangkapichai and R. Jayakrishnan (2009) “Environmental impacts of a major freight corridor: A study of the I-710 in California”, in Proceedings of the 89th annual meeting of the transportation research board, washington, DC. [ITS-Irvine record]
45. Mana Sangkapichai, Jean-Daniel Saphores, Stephen G. Ritchie, Soyoung You and Gunwoo Lee (2009) “Analysis of PM and NOx train emissions in the alameda corridor, California”, in Proceedings of the 88th annual meeting of the transportation research board, p. 19p. Available at: https://escholarship.org/uc/item/91v8j6hk. [ITS-Irvine record]
46. Matt Heling, Jean-Daniel Saphores and G. Scott Samuelsen (2009) “User characteristics and responses to shared-use station car program: Analysis of ZEV-NET in orange county, California”, in Proceedings of the 88th annual meeting of the transportation research board, p. 17p. [ITS-Irvine record]
47. Mei-Ting Tsai, Jean-Daniel Saphores and Amelia Regan (2009) “Freight transportation contracting under uncertainty”, in Proceedings of the 88th annual meeting of the transportation research board, p. 14p. [ITS-Irvine record]
48. Mei-Ting Tsai, Amelia Regan and Jean-Daniel Saphores (2008) “Freight transportation derivatives contracts: State of the art and future developments”, in Proceedings of the 87th annual meeting of the transportation research board, p. 15p. [ITS-Irvine record]
49. Hilary Nixon and Jean-Daniel Saphores (2007) “Impacts of motor vehicle operation on water quality: Clean-up costs and policies”, in Proceedings of the 11th world conference on transport research, berkeley, CA, p. 39p. [ITS-Irvine record]
50. Jean-Daniel Saphores (2007) “Population uncertainty and the timing of an urban transportation infrastructure investment”, in Proceedings of the 11th world conference on transport research, berkeley, CA, p. 30p. [ITS-Irvine record]
51. Hilary Nixon and Jean-Daniel Saphores (2002) “Used oil policies to protect the environment: An overview of Canadian experiences”, in Traffic and transportation studies (2002). American Society of Civil Engineers. Available at: 10.1061/40630(255)11. [ITS-Irvine record]

Books and Book Chapters

1. Jean-Daniel Saphores, Lu Xu and Bumsub Park (2023) “COVID-19 and Food Shopping: Results from California and Comparisons with China and South Korea”, in A. Loukaitou-Sideris, A.M. Bayen, G. Circellaand R. Jayakrishnan (eds.) Pandemic in the Metropolis: Transportation Impacts and Recovery. Cham: Springer International Publishing (Springer Tracts on Transportation and Traffic), pp. 95–111. Available at: https://doi.org/10.1007/978-3-031-00148-2_7 (Accessed: October 5, 2023). [ITS-Irvine record]
2. Jean Daniel Saphores, Sarah Chesebro, Thera Black and Stacey Bricka (2013) “Transportation research circular”. Transportation Research Board, p. 30p. [ITS-Irvine record]
3. Yanjie Ji, Wei Wang, Wei Deng and Jean-Daniel Saphores (2008) “A model of parking choice and behavior”, in Transportation and development innovative best practices 2008. American Society of Civil Engineers, pp. pp 395–400. Available at: https://doi.org/10.1061/40961(319)65. [ITS-Irvine record]

Technical Reports

1. Farzana Khatun and Jean-Daniel Saphores (2025) What Explains Trends in Orange County Transportation Authority Bus Ridership?. Research Report. UC ITS. Available at: https://doi.org/10.7922/g2kw5dds. [ITS-Irvine record]
2. Miguel Jaller, Anmol Pahwa, Jean-Daniel Saphores and Michael Hyland (2025) Benefits, Challenges, and Opportunities of Different Last-Mile Delivery Strategies. Research Report. UC ITS. Available at: https://doi.org/10.7922/g26971zw. [ITS-Irvine record]
3. Jean-Daniel Saphores and Farzana Khatun (2024) Enhancing Student Outcomes While Strengthening Transit: An Analysis of LA Metro’s GoPass Fareless Pilot Program. Final Report PSR 22-23 TO 068. PSR / ITS-Irvine. [ITS-Irvine record]
4. Jean-Daniel Saphores and Farzana Khatun (2022) Public Transportation, Transportation Network Companies (TNCs), and Active Modes. Research Report. ITS-Irvine. Available at: https://metrans.org/assets/research/psr-19-34_to-035_saphores_final-report.pdf. [ITS-Irvine record]
5. Austin L. Brown, Daniel Sperling, Bernadette Austin, J. R. DeShazo, Lew Fulton, Timothy Lipman, Colin W. Murphy, Jean Daniel Saphores, Gil Tal, Carolyn Abrams, Debapriya Chakraborty, Daniel Coffee, Sina Dabag, Adam Davis, Mark A. Delucchi, Kelly L. Fleming, Kate Forest, Juan Carlos Garcia Sanchez, Susan Handy, Michael Hyland, Alan Jenn, Seth Karten, Blake Lane, Michael Mackinnon, Elliot Martin, Marshall Miller, Monica Ramirez-Ibarra, Stephen Ritchie, Sara Schremmer, Joshua Segui, Susan Shaheen, Andre Tok, Aditya Voleti, Julie Witcover and Allison Yang (2021) Driving California’s Transportation Emissions to Zero. Available at: https://escholarship.org/uc/item/3np3p2t0 (Accessed: October 11, 2023). [ITS-Irvine record]
6. Jean-Daniel Saphores, Deep Shah and Farzana Khatun (2020) A Review of Reduced and Free Transit Fare Programs in California. Final Report UC-ITS-2019-55. Available at: https://escholarship.org/uc/item/74m7f3rx (Accessed: October 11, 2023). [ITS-Irvine record]
7. Suman K. Mitra and Jean-Daniel Saphores (2018) An Analysis of Travel Characteristics of Carless Households in California. Available at: https://escholarship.org/uc/item/4j54k2bv (Accessed: October 11, 2023). [ITS-Irvine record]
8. Pierre Auza, Daniel Chong and Jean-Daniel Saphores (2017) A Literature Review: Improving How Active Transportation Demand is Modeled and Evaluated. Available at: https://escholarship.org/uc/item/34b7d61h (Accessed: October 11, 2023). [ITS-Irvine record]
9. Jean-Daniel Saphores (2017) The effectiveness of state and local incentives on household ownership of alternative fuel vehicles - a SEM analysis. Final Report CA 16-2918. California. Dept. of Transportation / ITS-Irvine. Available at: https://dot.ca.gov/-/media/dot-media/programs/research-innovation-system-information/documents/f0016832-ca16-2918-finalreport-a11y.pdf. [ITS-Irvine record]
10. Ankoor Bhagat, Jean-Daniel Saphores and R Jayakrishnan (2017) Detecting changes in accident rates using a hierarchical Bayesian approach: An application to the I-710 and the implementation of the PierPASS program. [ITS-Irvine record]
11. Harya S Dillon and Jean-Daniel Saphores (2017) Incentives to promote household ownership of alternative fuel vehicles: Effectiveness and unintended effects. [ITS-Irvine record]
12. Craig Ross Rindt, Suman Kumar Mitra and Jean-Daniel Saphores (2016) Analyzing the 2012 California Household Travel Survey using R: Summary. Research Report. ITS-Irvine. Available at: https://drive.google.com/file/d/1B2aWB9AETBJaRknKsts484wK_YCuf2ZJ/view?usp=drive_link. [ITS-Irvine record]
13. Craig R. Rindt, Suman K. Mitra and Jean-Daniel Saphores (2016) Analyzing the 2012 California Household Travel Survey using R. Final Report. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/9n42t87s. [ITS-Irvine record]
14. Ankoor Bhagat, Ke Wang, R Jayakrishnan and Jean-Daniel Saphores (2015) Schemes to expand origin-destination estimation results for microscopic simulation to an extended network. [ITS-Irvine record]
15. Jean Daniel Saphores, Sarah Chesebro, Thera Black and Stacey Bricka (2013) Exploring new directions for the national household travel survey. Phase one report of activities. E-C178. Available at: https://onlinepubs.trb.org/onlinepubs/circulars/ec178.pdf. [ITS-Irvine record]
16. Jean-Daniel Saphores and Hilary Nixon (2012) US household preferences for alternative-fuel vehicles: Results from a national survey. [ITS-Irvine record]
17. Hilary Nixon and Jean-Daniel Saphores (2011) Understanding household preferences for alternative-fuel vehicle technologies, p. 130p. [ITS-Irvine record]
18. Qijian Gan, Jielin Sun, Wenlong Jin and Jean-Daniel Saphores (2011) Incorporating Vehicular Emissions into an Efficient Mesoscopic Traffic Model: An Application to the Alameda Corridor, CA. Final Report UCTC-FR-2011-02. Institute of Transportation Studies, UC Irvine: University of California Transportation Center. Available at: https://escholarship.org/uc/item/2w12n0c6. [ITS-Irvine record]
19. Hao Yang, Daji Yuan, Wen-Long Jin and Jean-Daniel Saphores (2010) Simulation evaluation of green driving strategies based on inter-vehicle communications. University of California Transportation Center, p. 23p. [ITS-Irvine record]
20. Gunwoo Lee, Soyoung (Iris) You, Mana Sangkapichai, Stephen G. Ritchie, Jean-Daniel M Saphores, Oladele Ogunseitan, Roberto Ayala, R. Jayakrishnan and Rodolfo Torres (2010) Assessing the Environmental and Health Impacts of Port-Related Freight Movement in a Major Urban Transportation Corridor. Final Report UCTC-FR-2010-08. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/9zb040jb. [ITS-Irvine record]

Policy Briefs

1. Susan Pike, Juan Matute, Monisha Reginald and Jean-Daniel Saphores (2025) Capacity Building is Key for Accelerating Open-loop Payments Adoption Among Transit Agencies. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2pn9404. [ITS-Irvine record]
2. Monica Ramirez-Ibarra and Jean-Daniel Saphores (2025) What are the Public Health and Environmental Implications of Drayage Truck Electrification Targets in California?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2b27sp7. [ITS-Irvine record]
3. Jean-Daniel Saphores and Md. Rabiul Islam (2024) An L.A. Story: The Impact of Housing Costs on Commuting. Policy Brief. UC ITS. Available at: https://escholarship.org/uc/item/82v6m81r. [ITS-Irvine record]
4. Jean-Daniel Saphores and Lu Xu (2024) Grocery Shopping in California and COVID-19: Transportation, Environmental Justice, and Policy Implications. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g29g5k53. [ITS-Irvine record]
5. Jean-Daniel Saphores and Monica Ramirez-Ibarra (2024) Transitioning to Electric Drayage Trucks May Help Avoid Adding New Freeway Lanes to Freight Corridors in Southern California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2f769wd. [ITS-Irvine record]
6. Md. Rabiul Islam and Jean-Daniel Saphores (2024) Did COVID-19 Fundamentally Reshape Telecommuting in California?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2z899rr. [ITS-Irvine record]
7. Jean-Daniel Saphores and Farzana Khatun (2024) Did Extending Driver Licenses to Individuals Without Legal Presence Affect Transit Ridership in Orange County?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2j101hr. [ITS-Irvine record]
8. Arash Ghaffar, Michael Hyland and Jean-Daniel Saphores (2023) What Drives Shared Micromobility Ridership?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2v40skk. [ITS-Irvine record]
9. Jean-Daniel Saphores (2022) Public Transportation, Transportation Network Companies (TNCs), and Active Modes. Policy Brief. ITS-Irvine. Available at: https://metrans.org/assets/research/psr-19-34_saphores_research-brief.pdf. [ITS-Irvine record]
10. Amelia Regan and Jean-Daniel Saphores (2020) Will COVID-19 Worsen California’s Truck Driver Shortage?. Policy Brief. Available at: https://escholarship.org/uc/item/0js6k8tc (Accessed: October 11, 2023). [ITS-Irvine record]
11. Amelia Regan and Jean-Daniel Saphores (2020) Will COVID-19 Worsen California’s Truck Driver Shortage?. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2x63k72. [ITS-Irvine record]
12. Jean-Daniel Saphores (2020) Travel Varies Greatly Between Voluntary Versus Involuntary Carless Households in California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g2bp015z. [ITS-Irvine record]
13. Jean-Daniel Saphores (2020) A Review of Reduced and Free Transit Fare Programs in California. Policy Brief UC-ITS-2019-55-pb. UC ITS. Available at: https://doi.org/10.7922/g2fj2f4s. [ITS-Irvine record]
14. Qijian Gan, Jielin Sun and Jean-Daniel Saphores (2011) Estimating emissions using an integrated traffic model. Policy Brief 2011-04. ITS-Irvine: University of California Transportation Center. [ITS-Irvine record]
15. Gunwoo Lee, Soyoung Iris You, Mana Sangkapichai, Stephen G Ritchie, Jean-Daniel Saphores, Oladele Ogunseitan, Roberto Ayala, R Jayakrishnan and Rodolfo Torres (2010) Health impacts of moving freight in and out of the ports of long beach and Los Angeles. Policy Brief UCTC POLICY BRIEF 2010-04. University of California Transportation Center. Available at: https://escholarship.org/uc/item/2fb6k6s6. [ITS-Irvine record]

Working Papers

1. Nesamani Kalandiyur, Jean-Daniel Saphores, Michael G. McNally and R. Jayakrishnan (2011) The influence of emissions specific characteristics on vehicle operation: A micro-simulation analysis. Working Paper UCI-ITS-WP-11-5. ITS-Irvine. Available at: https://escholarship.org/uc/item/4zj9t4nb. [ITS-Irvine record]
2. QI-JIAN GAN, JIELIN SUN, Wenlong Jin, Jean-Daniel Saphores (2011) Estimating Emissions Using an Integrated Traffic Model. Available at: https://escholarship.org/uc/item/5hp379p2. [ITS-Irvine record]
3. Gunwoo Lee, Soyoung Iris You, Stephen G. Ritchie, Jean-Daniel Saphores, Mana Sangkapichai and R. Jayakrishnan (2008) Environmental Impacts of a Major Freight Corridor: A study of the I-710 in California. Working Paper UCI-ITS-WP-08-3. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/20b7q5fn. [ITS-Irvine record]
4. Mei-Ting Tsai, Jean-Daniel Saphores and Amelia Regan (2008) Freight Transportation Contracting Under Uncertainty. Working Paper UCI-ITS-WP-08-2. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/2pn0h83w. [ITS-Irvine record]
5. Mana Sangkapichai, Jean-Daniel Saphores, Stephen G. Ritchie, Soyoung (Iris) You and Gunwoo Lee (2008) An Analysis of PM and NOx Train Emissions in the Alameda Corridor, CA.. Working Paper UCI-ITS-WP-08-4. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/00n2h30c. [ITS-Irvine record]
6. Matt G. Heling, Jean-Daniel Saphores and G. Scott Samuelsen (2008) User Characteristics and Reponses to a Shared-Use Station Car Program: An Analysis of ZEV•NET in Orange County, CA. Working Paper UCI-ITS-WP-08-1. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/8tw5f21p. [ITS-Irvine record]
7. Hilary Nixon, Jean-Daniel Saphores (2007) Impacts of Motor Vehicle Operation on Water Quality in the United States – Clean-up Costs and Policies. Available at: https://escholarship.org/uc/item/4bv8v8gj. [ITS-Irvine record]
8. Jean-Daniel M. Saphores (2006) Population Uncertainty and the Timing of an Urban Transportation Infrastructure Investment. Working Paper UCI-ITS-WP-06-1. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/3kg8g9z4. [ITS-Irvine record]
9. Jean-Daniel M. Saphores and Marlon G. Boarnet (2004) Uncertainty And The Timing Of An Urban Congestion Relief Investment. Working Paper UCI-ITS-WP-04-2. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/2x46m9pb. [ITS-Irvine record]
10. Hilary Nixon, Jean-Daniel Saphores (2003) A Preliminary Assessment. Available at: https://escholarship.org/uc/item/1j48d7sw. [ITS-Irvine record]
11. Hilary Nixon, Jean-Daniel Saphores (2003) A Premilinary Assessment. Available at: https://escholarship.org/uc/item/1t33c1jk. [ITS-Irvine record]
12. Hilary Nixon and Jean-Daniel Saphores (2001) Used Oil Policies to Protect the Environment: An Overview of Canadian Experiences. Working Paper UCI-ITS-WP-01-5, UCTC 666. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/8x15b0x7. [ITS-Irvine record]

Preprints

1. Hilary Nixon, Jean-Daniel Saphores (2003) An Overview of Canadian Experiences. Available at: https://escholarship.org/uc/item/79c9b9h6. [ITS-Irvine record]