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Andre (Yeow Chern) Tok

  • UGSRBEng, Civil EngineeringNational University of Singapore19982002
  • MS studentMS, Civil EngineeringDepartment of Civil and Environmental EngineeringSamueli School of EngineeringUC Irvine20022004
  • GSRITS-IrvineUC Irvine20042008
  • PhD studentPhD, Civil and Environmental EngineeringDepartment of Civil and Environmental EngineeringSamueli School of EngineeringUC Irvine20042008
    Dissertation
    Commercial vehicle classification system using advanced inductive loop technology
    Advisor
    Stephen Ritchie
  • PostdocITS-IrvineUC Irvine20082013
  • Assistant Project ScientistITS-IrvineUC Irvine20132019
  • Testbeds ManagerITS-IrvineUC Irvine2016
  • Associate Project ScientistITS-IrvineUC Irvine2019

As Testbeds Manager, Dr. Tok is responsible for maintaining the physical and virtual infrastructure for the Institute’s transportation Testbeds, which include the Freight Mobility Living Laboratory (FML2) and the Irvine Connected Vehicle Testbed. In addition to these responsibilities, Dr. Tok conducts research and provides administrative support at the Institute, including assisting with the development of grant proposals. His research interest is in the area of advanced traffic detection and freight transportation modeling. He has played a major role in the development of the California Statewide Freight Forecasting Model, and is a lead researcher on several research projects, including the aforementioned FML2 system. His current research includes developing new technologies to improve truck surveillance and freight transportation data and conducting a pilot study to estimate truck travel in the State of California.

Record last updated: March 20, 2025.

Areas of Expertise

Freight, Logistics, & Supply Chain Infrastructure Delivery, Operations, & Resilience Intelligent Transportation Systems, Emerging Technologies, & Big Data

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Related Information

ITS Affiliations

Recent Projects

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California Locomotive Surveillance System Maintenance, Expansion, and Analysis

In Progress | Feb 2025—Feb 2030

Research Team:

Stephen Ritchie (lead), Andre (Yeow Chern) Tok

Department(s):

Civil and Environmental Engineering

Freight logistics and optimization Integrating freight and passenger systems Vehicles and infrastructure

Complete | Jan 2024—Dec 2024

Research Team:

Stephen Ritchie (lead), Andre (Yeow Chern) Tok, Mingqi Yao

Department(s):

Civil and Environmental Engineering

Increasing Transportation Efficiency and Resiliency through MODeling Assets and Logistics (INTERMODAL) Integrated Intermodal Freight Models and Tools for Efficiency and Resiliency

In Progress | Dec 2023—Jun 2026

Research Team:

Stephen Ritchie (lead), Andre (Yeow Chern) Tok, Chenyu Yuan, Mingqi Yao

Department(s):

Civil and Environmental Engineering

Recent Research Products

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published journal article | Jul 2025

Infrastructure-based sensor fusion for acquiring gross vehicle weight rating classifications
Transportation Research Interdisciplinary Perspectives

published journal article | Jan 2025

Adaptive Self-Learning Framework for Resilient Vehicle Classification Through the Integration of Inductive Loops and LiDAR Sensors
IEEE Open Journal of Intelligent Transportation Systems

conference paper | Jan 2025

Advancing Gross Vehicle Weight Rating Classification Through the Integration of Inductive Loop and Side Fire Camera System
Proceedings, 104th Annual Meeting of the Transportation Research Board

Events

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Past Sep 8, 2008 @ 10:00am PhD Defense

PhD Defense: Commercial Vehicle Classification System using Advanced Inductive Loop Technology

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Publications

Note: Publications listed below are generally limited to those associated activity during Andre (Yeow Chern) Tok's affiliation with ITS-Irvine. The list may be incomplete. For a more comprehensive list, please visit their Google Scholar profile or consult other data sources in their Related Information.

Journal Articles

  1. Guoliang Feng, Yiqiao Li, Andre Y.C. Tok and Stephen G. Ritchie (2025) “Infrastructure-based sensor fusion for acquiring gross vehicle weight rating classifications”, Transportation Research Interdisciplinary Perspectives, 32, p. 101535. Available at: 10.1016/j.trip.2025.101535. [ITS-Irvine record]
  2. Yiqiao Li, Andre Y. C. Tok and Stephen G. Ritchie (2025) “Adaptive Self-Learning Framework for Resilient Vehicle Classification Through the Integration of Inductive Loops and LiDAR Sensors”, IEEE Open Journal of Intelligent Transportation Systems, 6, pp. 768–780. Available at: 10.1109/OJITS.2025.3575808. [ITS-Irvine record]
  3. Yiqiao Li, Andre Y. C. Tok, Guoliang Feng and Stephen G. Ritchie (2024) “Real-time truck characterization system: A pilot implementation of the Freight Mobility Living Laboratory (FML2)”, Transportation Research Interdisciplinary Perspectives, 27, p. 101212. Available at: 10.1016/j.trip.2024.101212. [ITS-Irvine record]
  4. Yiqiao Li, Andre Y. C. Tok, Zhe Sun, Stephen G. Ritchie and Koti Reddy Allu (2023) “LiDAR Vehicle Point Cloud Reconstruction Framework for Axle-Based Classification”, IEEE Sensors Journal, 23(11), pp. 11168–11180. Available at: 10.1109/JSEN.2023.3235301. [ITS-Irvine record]
  5. Yingji Xia, Zhe Sun, Andre Tok and Stephen Ritchie (2022) “A dense background representation method for traffic surveillance based on roadside LiDAR”, Optics and Lasers in Engineering, 152, p. 106982. Available at: 10.1016/j.optlaseng.2022.106982. [ITS-Irvine record]
  6. Yiqiao Li, Andre Tok and Stephen G. Ritchie (2022) “Deep Ensemble Neural Network Approach for Federal Highway Administration Axle-Based Vehicle Classification Using Advanced Single Inductive Loops”, Transportation Research Record, 2676(3), pp. 1–16. Available at: 10.1177/03611981211049142. [ITS-Irvine record]
  7. Yiqiao Li, Koti Reddy Allu, Zhe Sun, Andre Y. C. Tok, Guoliang Feng and Stephen G. Ritchie (2021) “Truck body type classification using a deep representation learning ensemble on 3D point sets”, Transportation Research Part C: Emerging Technologies, 133, p. 103461. Available at: 10.1016/j.trc.2021.103461. [ITS-Irvine record]
  8. Jaeyoung Jung, Andre Tok and Stephen G. Ritchie (2021) “Determining optimal sensor locations under uncertainty for a truck activity monitoring system on California freeways”, Journal of Intelligent Transportation Systems, 25(3), pp. 221–234. Available at: 10.1080/15472450.2019.1579094. [ITS-Irvine record]
  9. Kyung (Kate) Hyun, Suman Kumar Mitra, Kyungsoo Jeong and Andre Tok (2021) “Understanding the effects of vehicle platoons on crash type and severity”, Accident Analysis & Prevention, 149, p. 105858. Available at: 10.1016/j.aap.2020.105858. [ITS-Irvine record]
  10. Kyung (Kate) Hyun, Kyungsoo Jeong, Andre Tok and Stephen G. Ritchie (2019) “Assessing crash risk considering vehicle interactions with trucks using point detector data”, Accident Analysis & Prevention, 130, pp. 75–83. Available at: 10.1016/j.aap.2018.03.002. [ITS-Irvine record]
  11. Yiqiao Li, Andre Y.C. Tok and Stephen G. Ritchie (2019) “Individual truck speed estimation from advanced single inductive loops”, Transportation Research Record, 2673(5), pp. 272–284. Available at: 10.1177/0361198119841289. [ITS-Irvine record]
  12. Kyung (Kate) Hyun, Andre Tok and Stephen G. Ritchie (2017) “Long distance truck tracking from advanced point detectors using a selective weighted Bayesian model”, Transportation Research Part C: Emerging Technologies, 82, pp. 24–42. Available at: 10.1016/j.trc.2017.06.004. [ITS-Irvine record]
  13. Andre Tok, Kyung (Kate) Hyun, Sarah Hernandez, Kyungsoo Jeong, Yue (Ethan) Sun, Craig Rindt and Stephen G. Ritchie (2017) “Truck activity monitoring system for freight transportation analysis”, Transportation Research Record, 2610(1), pp. 97–107. Available at: 10.3141/2610-11. [ITS-Irvine record]
  14. Sarah V. Hernandez, Andre Tok and Stephen G. Ritchie (2016) “Integration of Weigh-in-Motion (WIM) and inductive signature data for truck body classification”, Transportation Research Part C: Emerging Technologies, 68, pp. 1–21. Available at: 10.1016/j.trc.2016.03.003. [ITS-Irvine record]
  15. Kyungsoo Jeong, Andre Tok, Stephen G. Ritchie and Junhyeong Park (2016) “California vehicle inventory and use survey: Pilot study insights”, Transportation Research Record, 2547(1), pp. 32–40. Available at: 10.3141/2547-06. [ITS-Irvine record]
  16. Paulos Ashebir Lakew and Yeow Chern Andre Tok (2015) “Determinants of air cargo traffic in California”, Transportation Research Part A: Policy and Practice, 80, pp. 134–150. Available at: 10.1016/j.tra.2015.07.005. [ITS-Irvine record]
  17. Kyung (Kate) Hyun, Sarah Hernandez, Andre Tok and Stephen G. Ritchie (2015) “Truck body configuration volume and weight distribution. Estimation by Using Weigh-in-Motion Data”, Transportation Research Record, 2478(1), pp. 103–112. Available at: 10.3141/2478-12. [ITS-Irvine record]
  18. Andre Y.C. Tok, Miyuan Zhao, Joseph Y.J. Chow, Stephen Ritchie and Dmitri Arkhipov (2011) “Online data repository for statewide freight planning and analysis”, Transportation Research Record, 2246(1), pp. 121–129. Available at: 10.3141/2246-15. [ITS-Irvine record]
  19. Shin-Ting Jeng, Yeow Chern Andre Tok and Stephen G. Ritchie (2010) “Freeway corridor performance measurement based on vehicle reidentification”, IEEE Trans. Intell. Transport. Syst., 11(3), pp. 639–646. Available at: 10.1109/tits.2010.2049105. [ITS-Irvine record]

Conference Papers

  1. Guoliang Feng, Yiqiao Li, Andre Tok and Stephen G. Ritchie (2025) “Advancing Gross Vehicle Weight Rating Classification Through the Integration of Inductive Loop and Side Fire Camera System”, in Proceedings, 104th Annual Meeting of the Transportation Research Board. Washington, D.C.. [ITS-Irvine record]
  2. Yiqiao Li, Andre Tok and Stephen G. Ritchie (2024) “A Deep Learning Approach for Drayage Truck Identification Using Inductive Loops”, in 2024 Forum for Innovative Sustainable Transportation Systems (FISTS). 2024 Forum for Innovative Sustainable Transportation Systems (FISTS), pp. 1–6. Available at: 10.1109/FISTS60717.2024.10485535. [ITS-Irvine record]
  3. Yiqiao Li, Andre Tok, Guoliang Feng and Stephen G. Ritchie (2023) “Real-time Truck Characterization System: A Pilot Implementation of the Freight Mobility Living Laboratory (FML2)”. 102nd Transportation Research Board Annual Meeting 2023. [ITS-Irvine record]
  4. Guoliang Feng, Yiqiao Li, Andre Tok and Stephen G. Ritchie (2023) “An Investigation of Classification by Gross Vehicle Weight Rating Categories using Advanced Single Inductive Loops”, in 102nd Annual Meeting of the Transportation Research Board, Washington, D.C.. [ITS-Irvine record]
  5. Yiqiao Li, Andre Tok, Zhe Sun, Stephen G. Ritchie and Koti Reddy Allu (2022) “LiDAR Vehicle Point Cloud Reconstruction Framework for Axle-Based Classification”. 101st Annual Meeting of the Transportation Research Board. [ITS-Irvine record]
  6. Yiqiao Li, Andre Tok and Stephen Ritchie (2022) “A Self-Learning Framework for Vehicle Classification System through the Integration of Advanced Inductive Loops and Multi-array LiDAR Sensors”. 101st Annual Meeting of the Transportation Research Board. [ITS-Irvine record]
  7. Andre Tok (2021) “Characterizing Freight Trucks using Advanced Technology-Based Methods”. 100th Transportation Research Board (TRB) Annual Meeting, Washington, DC. [ITS-Irvine record]
  8. Yiqiao Li, Andre Tok and Stephen Ritchie (2021) “A Deep Ensemble Neural Network Approach for FHWA Axle-based Vehicle Classification using Advanced Single Inductive Loops”. 100th Annual Meeting of the Transportation Research Board (TRB). Available at: https://escholarship.org/uc/item/4sf4v88g (Accessed: October 11, 2023). [ITS-Irvine record]
  9. Yiqiao Li, Koti R Allu, Zhe Sun, Andre Tok, Guoliang Feng and Stephen G. Ritchie (2021) “An Ensemble Approach to Truck Body Type Classification using Deep Representation Learning on 3D Point Sets”. 100th Transportation Research Board (TRB) Annual Meeting, Washington, DC. [ITS-Irvine record]
  10. Junhyeong Park, Craig Rindt, Andre Tok and Stephen G. Ritchie (2019) “Investigation of the operational characteristics of vocational natural gas vehicles in southern California and their influence on nitrogen oxide emission productions by road type”, in Proceedings of the 98th annual meeting of the transportation research board, p. 8p. [ITS-Irvine record]
  11. Jaeyoung Jung, Andre Tok and Stephen G. Ritchie (2018) “Determining optimal sensor locations under uncertainty for advanced truck surveillance on California freeways”, in Proceedings of the 97th annual meeting of the transportation research board, p. 6p. [ITS-Irvine record]
  12. Kyung (Kate) Hyun, Kyungsoo Jeong, Andre Tok and Stephen G. Ritchie (2017) “Assessing crash risks considering vehicle interactions with trucks using point detector data”, in Proceedings of the 96th annual meeting of the transportation research board, p. 17p. [ITS-Irvine record]
  13. Kyung (Kate) Hyun, Andre Tok and Stephen G. Ritchie (2016) “Long-distance truck tracking from advanced point detectors using selective weighted Bayesian model”, in Proceedings of the 95th annual meeting of the transportation research board, p. 23p. [ITS-Irvine record]
  14. Sarah Hernandez, Andre Tok and Stephen G. Ritchie (2015) “Multiple-classifier systems for truck body classification at WIM sites with inductive signature data”, in Proceedings of the 94th annual meeting of the transportation research board, p. 21p. [ITS-Irvine record]
  15. Sarah Hernandez, Andre Tok and Stephen G Ritchie (2014) “Integration of weigh-in-motion and inductive signature technology for advanced truck monitoring”, in 93rd annual meeting of the transportation research board, washington, DC. [ITS-Irvine record]
  16. Hang Liu, Yeow Chern Andre Tok and Stephen G. Ritchie (2011) “Development of a real-time on-road emissions estimation and monitoring system”, in 2011 14th international IEEE conference on intelligent transportation systems (ITSC). IEEE / IEEE, pp. 1821–1826. Available at: 10.1109/itsc.2011.6083006. [ITS-Irvine record]
  17. Yeow Chern Andre Tok and Stephen G. Ritchie (2010) “Vector classification of commercial vehicles using a high-fidelity inductive loop detection system”, in Proceedings of the 89th annual meeting of the transportation research board, p. 22p. [ITS-Irvine record]
  18. Andre Tok, Sarah Vavrik Hernandez and Stephen G. Ritchie (2009) “Accurate individual vehicle speeds from single inductive loop signatures”, in Proceedings of the 88th annual meeting of the transportation research board, p. 22p. [ITS-Irvine record]
  19. Andre Tok, Shin-Ting Jeng, Hang Liu and Stephen G. Ritchie (2008) “Design and initial implementation of an inductive signature-based real-time traffic performance measurement system”, in 2008 11th international IEEE conference on intelligent transportation systems. IEEE / IEEE, pp. 216–221. Available at: 10.1109/itsc.2008.4732703. [ITS-Irvine record]
  20. Yeow Chern Andre Tok, Stephen G. Ritchie and Shin-Ting Jeng (2007) “Understanding commercial vehicle travel through new high-fidelity inductive sensors”, in Proceedings of the 86th annual meeting of the transportation research board, p. 22p. [ITS-Irvine record]
  21. Shin-Ting Jeng, Stephen G. Ritchie and Yeow Chern Tok (2007) “Freeway corridor performance measurement based on vehicle reidentification”, in Proceedings of the 86th annual meeting of the transportation research board, p. 23p. [ITS-Irvine record]

Theses and Dissertations

  1. Yeow Chern Andre Tok (2008) Commercial vehicle classification system using advanced inductive loop technology. Ph.D.. University of California, Irvine. Available at: https://uci.primo.exlibrisgroup.com/permalink/01CDL_IRV_INST/1go3t9q/alma991035092965004701 (Accessed: October 14, 2023). [ITS-Irvine record]

Books and Book Chapters

  1. Yiqiao Li, Andre Tok, Guoliang Feng and Stephen G. Ritchie (2023) “Understanding and Modeling the Impacts of COVID-19 on Freight Trucking Activity”, 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. 113–128. Available at: https://doi.org/10.1007/978-3-031-00148-2_8 (Accessed: October 5, 2023). [ITS-Irvine record]

Technical Reports

  1. Stephen G. Ritchie, Andre Y.C. Tok, Tanjeeb Ahmed and Mingqi Yao (2024) Route-based Freight Activity Metrics along the California State Highway System through a Pilot Multi Sensor Fusion System. Final Report PSR-23-03 TO 073. PSR / ITS-Irvine. Available at: https://www.metrans.org/assets/research/route%20based%20freight%20activity%20metrics%20along%20the%20california%20state%20highway%20system%20through%20a%20pilot%20multi%20sensor%20fusion%20system.pdf. [ITS-Irvine record]
  2. Craig Rindt, Mingqi Yao, Naila Sharmeen, Andre Tok, Stephen G. Ritchie, Blake Lane, Kate Forrest, Mike MacKinnon, Scott Samuelsen, Bo Liu, Kanok Boriboonsomsin, Abdullah Fuad Un-Noor, Suman Mitra, Farzana Mehzabin Tuli and Vuban Chowdhury (2023) Low-Carbon Transportation Incentive Strategies Using Performance Evaluation Tools for Heavy-Duty Trucks and Off-Road Equipment. Draft Final Report. California Air Resources Board / Institute of Transportation Studies, UC Irvine. Available at: https://ww2.arb.ca.gov/sites/default/files/2024-01/IV.3%20-%2019rd026-dfr-rsc_final_2023_12_20_clean.pdf. [ITS-Irvine record]
  3. Stephen Ritchie, Andre Tok and Yiqiao Li (2023) Improved California Truck Traffic Census Reporting and Spatial Activity Measurement. Available at: http://escholarship.org/uc/item/0hg3x790. [ITS-Irvine record]
  4. Stephen G. Ritchie, Andre Tok, Yiqiao Li, Zhe Sun and Koti Reddy Allu (2023) Investigation of LiDAR Sensing Technology to Improve Freeway Traffic Monitoring. Research Report. ITS-Irvine. Available at: https://metrans.org/assets/research/psr%2021-34_ritchie_final%20report.pdf. [ITS-Irvine record]
  5. Stephen G. Ritchie, Andre Tok, Yiqiao Li, Jared Sun and Koti R Allu (2021) Investigation of Truck Data Collection using LiDAR Sensing Technology Along Rural Highways. PSR-19-51. Available at: https://metrans.org/assets/research/uci-19-51-ritchie_final-report.pdf (Accessed: October 11, 2023). [ITS-Irvine record]
  6. 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]
  7. Jaeyoung Jung, Andre Tok and Stephen G Ritchie (2018) Determining optimal sensor locations under uncertainty for advanced truck surveillance on California freeways. [ITS-Irvine record]
  8. Stephen G. Ritchie, Kyung Hyun and Andre Tok (2017) New Methods for Monitoring Spatial Truck Travel Patterns in California Using Exisiting Dectector Infrastructure. Research Report UC-ITS-2017-36. UC ITS / ITS-Irvine. Available at: https://doi.org/10.7922/g29p2zvj. [ITS-Irvine record]
  9. Stephen G. Ritchie and Andre Tok (2016) Development of a New Methodology to Characterize Truck Body Types along California Freeways. Research Report. ITS-Irvine. Available at: https://ww2.arb.ca.gov/sites/default/files/classic/research/apr/past/11-316.pdf. [ITS-Irvine record]
  10. Wei-bin Zhang, Jihua Huang, Andre Tok, Ching-Yao Chang and Stephen Ritchie (2014) The Requirements and Recommendations for Development of a California Weigh-in-Motion Test Facility. University of California, Berkeley / California Partners for Advanced Transit and Highways, p. 130p. [ITS-Irvine record]
  11. Andre Tok and Stephen G Ritchie (2014) Integration of weigh-in-motion and inductive signature technology for advanced truck monitoring. [ITS-Irvine record]
  12. Jaeyoung Jung, Andre Tok, Stephen G. Ritchie and Irvine University of California (2013) Optimal sensor locations for advanced truck surveillance on California freeways, p. 21p. [ITS-Irvine record]
  13. Stephen G. Ritchie, Andre Tok, Shin-Ting Jeng, Hang Liu, Sarah V. Hernandez and Jin Heoun Choi (2010) Online Freeway Corridor Deployment of Anonymous Vehicle Tracking for Real Time Traffic Performance. Research Report CA11-1226, UCI-0279. ITS-Irvine. Available at: https://dot.ca.gov/-/media/dot-media/programs/research-innovation-system-information/documents/f0017265-final-report-task-0686.pdf. [ITS-Irvine record]
  14. Stephen G. Ritchie, Shin-Ting Jeng, Andre Tok, Dmitri Arkhipov, Pedro Veiga De Camargo, Rex Chen, Joseph Y.J. Chow, Jae Young Jung, Fatemeh Ranaiefar and Miyuan Zhao (2010) Assessment and Development of Commodity Flow, Logistics, and Other Relevant Goods Movement Data Sources to Facilitate Statewide Freight Modeling. Research Report. ITS-Irvine. [ITS-Irvine record]
  15. Stephen G. Ritchie, Shin-Ting (Cindy) Jeng, Yeow Chern (Andre) Tok and Seri Park (2008) Corridor Deployment and Investigation of Anonymous Vehicle Tracking for Real-Time Traffic Performance Measurement. Final Report UCB-ITS-PRR-2008-23. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/7hx5k9vt. [ITS-Irvine record]
  16. Stephen G. Ritchie, Seri Park, Cheol Oh, Shin-Ting (Cindy) Jeng and Andre Tok (2005) Anonymous Vehicle Tracking for Real-Time Freeway and Arterial Street Performance Measurement. Final Report UCB-ITS-PRR-2005-9. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/50c6z6zh. [ITS-Irvine record]
  17. Steven Ritchie, Seri Park, Cheol Oh, Shin-Ting Jeng and Andre Tok (2005) Field Investigation of Advanced Vehicle Reidentification Techniques and Detector Technologies - Phase 2. Final Report UCB-ITS-PRR-2005-8. Institute of Transportation Studies, Irvine, p. 72p. Available at: https://escholarship.org/uc/item/3jq8609j. [ITS-Irvine record]

Policy Briefs

  1. Andre Tok, Stephen Ritchie and Craig Rindt (2019) New Tool from UC Irvine Could Save the State Millions while Providing Better Data on Truck Activity in California. Policy Brief. UC ITS. Available at: https://doi.org/10.7922/g21834r1. [ITS-Irvine record]
  2. Andre Tok, Stephen G. Ritchie and Craig Rindt (2019) New Tool from UC Irvine Could Save the State Millions while Providing Better Data on Truck Activity in California. Policy Brief. Available at: https://escholarship.org/uc/item/12w5z2c8 (Accessed: October 11, 2023). [ITS-Irvine record]

Working Papers

  1. Sarah Hernandez, Andre Tok and Stephen G. Ritchie (2022) Integration of Weigh-in-Motion and Inductive Signature Technology for Advanced Truck Monitoring. Working Paper UCI-ITS-WP-13-3. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/3tt6050j. [ITS-Irvine record]
  2. Yiqiao Li, Andre Tok, Zhe Sun, Stephen G. Ritchie and Koti Reddy Allu (2021) Vehicle Point Cloud Reconstruction Framework for FHWA axle-based Classification using Roadside LiDAR Sensor. Working Paper. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/2jf86859. [ITS-Irvine record]
  3. Paulos Ashebir Lakew and Yeow Chern Andre Tok (2014) Determinants of Air Cargo Traffic in California. Working Paper UCI-ITS-WP-13-7. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/13t1s772. [ITS-Irvine record]
  4. Sarah Hernandez, Andre Tok and Stephen G. Ritchie (2013) Density Estimation using Inductive Loop Signature based Vehicle Re-identification and Classification. Working Paper UCI-ITS-WP-13-4. Institute of Transportation Studies, Irvine. Available at: https://escholarship.org/uc/item/3x50n93f. [ITS-Irvine record]

Presentations

  1. Koti Reddy Allu, Montana Reinoehl, Siwei Hu, Andre Tok, Wenlong Jin, Jared Sun and Stephen G. Ritchie (2022) “Investigation to Develop Impaired Driving Detection System Using Lidar”. NSF AI Workshop, Gainesville, Florida, 15 December. [ITS-Irvine record]

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