Ong Ghim Ping Raymond

Dr ONG Ghim Ping Raymond is the Dean’s Chair Associate Professor and Deputy Head (Research and Enterprise) in the Department of Civil and Environmental Engineering at the National University of Singapore (NUS). He is concurrently the Director (Operations) at the Coastal Protection and Flood Resilience Institute (CFI) Singapore at NUS. Dr Ong graduated with a B.Eng (Civil) (First Class Honours) with a minor in Business from the National University of Singapore in 2003 and obtained his PhD in Civil Engineering from the National University of Singapore in 2007. Prior to his current appointment, he worked as a postdoctoral research associate in the School of Civil Engineering at Purdue University from 2007 to 2008, a visiting assistant professor at the same university in 2009, and then a lecturer (from 2010 to 2014) and assistant professor (2014-2020) in the Department of Civil and Environmental Engineering at the National University of Singapore.

Dr Ong’s research interests include sustainable pavements for a circular economy, and multimodal transport infrastructures and operations, with emphasis on future mega-transport infrastructures/operations (such as car-lite/car-free towns, next generation seaports and airports). He has authored or co-authored over 120 peer-reviewed journal articles as well as over 140 international conference papers/ presentations in these research areas. He is also actively involved in translational research grants/projects related to the engineering development of critical mega-infrastructures (including Tuas mega-port, Changi East Development, and Woodlands Checkpoint) and transport and urban policies in Singapore.

Dr Ong is currently serving in various scientific committees in the American Society of Civil Engineers, the American Society of Testing and Materials, the Eastern Asian Society of Transportation Studies, and the World Transport Convention (China). Nationally, he is currently serving as the Vice Chairman of the Singapore Road Safety Council (SRSC), the Vice-President of the Pavement Engineering Society (Singapore), and in several technical and standards committees in Singapore. Dr Ong is also serving in editorial roles in several peer-reviewed international journals. He has received several scientific awards in recognition of his achievements in transportation research, including the Alfred Nobel Prize (ASCE), the Hanjin Prize (IAME), the inaugural Takeuchi Yoshio Award (OCDI), the inaugural iSMARTi Early Career Award, the iSMARTi Achievement Award, and the NUS College of Design and Engineering Researcher Award. His research expertise and achievements have also led him to serve as a consultant to agencies and companies such as Changi Airport Group, Defence Science and Technology Agency, Arup Singapore, Surbana Jurong Infrastructures Pte Ltd, Global Maritime and Port Services Pte Ltd, and the Korean Maritime Institute. He is also a Chartered Engineer (Singapore) in railway and transportation engineering, and in road traffic design.

Dr Ong is also passionate about sharing his thoughts on current and future issues related to his research expertise with the public. He has frequently appeared in mainstream print or internet media (such as Straits Times, Lianhe Zaobao, The New Paper, Today Online) and live or pre-recorded TV interviews (such as Channel NewsAsia, Channel 8 info-ed programs and news, and Suria info-ed programs) speaking on issues on transport infrastructure and operations, active mobility, and car-lite/car-free initiatives.

Positions Held

• 2025-2027. Dean’s Chair, College of Design and Engineering, National University of Singapore.
• 2021-present. Associate Professor, Department of Civil and Environmental Engineering, National University of Singapore.
• 2023-present. Deputy Head (Research and Enterprise), Department of Civil and Environmental Engineering, National University of Singapore.
• 2023-present. Director (Operations), Coastal Protection and Flood Resilience Institute (CFI), Singapore, National University of Singapore.
• 2021-2023. Associate Head (Research), Department of Civil and Environmental Engineering, National University of Singapore.
• 2020-2023. Graduate Research Program Manager, Department of Civil and Environmental Engineering, National University of Singapore.
• 2014-2020. Assistant Professor, Department of Civil and Environmental Engineering, National University of Singapore.
• 2010-2014. Lecturer, Department of Civil and Environmental Engineering, National University of Singapore.
• 2009-2010. Visiting Assistant Professor, School of Civil Engineering, Purdue University.
• 2007-2008. Postdoctoral Research Associate, School of Civil Engineering, Purdue University.

Academic Qualifications

• B.Eng (Civil) (First Class Honours) with a minor in Business, National University of Singapore, Singapore, 2003.
• PhD, National University of Singapore, Singapore, 2007.

Professional Qualifications

• Chartered Engineer (CEng) in railway and transportation engineering, Singapore.
• Chartered Engineer (CEng) in road traffic design, Singapore.

Honours & Awards

Research

• Dean’s Chair, College of Design and Engineering, National University of Singapore, 2025-2027.
• College of Design and Engineering (CDE) Researcher Award, National University of Singapore, 2025.
• Best Presentation Award, 3rd International Symposium on Pavement Functional Design and Management (PFDM), 2025.
• Achievement Award. International Society of Maintenance and Rehabilitation of Transport Infrastructures (iSMARTi), 2023.
• Best Paper Award for Methodological Development, 14th Eastern Asia Society for Transportation Studies (EASTS) Conference, 2021.
• Early Career Award. International Society of Maintenance and Rehabilitation of Transport Infrastructures (iSMARTi), 2019. (Inaugural winner)
• Best Presentation Award, 11^th Asia Pacific Conference on Transportation and Environment, 2018.
• OCDI Takeuchi Yoshio Award for Logistic Research, Overseas Coastal Area Development Institute, Japan, 2014. (Inaugural winner)
• Best Paper Award for Technological Innovation, 10th International Conference of the Eastern Asia Society for Transportation Studies (EASTS), 2013.
• Best Paper Award, 8th International Conference of Road and Airfield Pavement Technology, 2013.
• First Prize, Next Generation Container Port Challenge, Maritime and Port Authority of Singapore & Singapore Maritime Institute, 2013.
• Hanjin Prize, International Association of Maritime Economists, 2012.
• Best Paper Award, 7th International Conference of Maintenance and Rehabilitation of Pavements and Technological Control, 2012.
• Alfred Nobel Prize, American Society of Civil Engineers, 2009.
• Best Paper Award, 6th International Conference of Maintenance and Rehabilitation of Pavements and Technological Control, 2009.

Student Research Award (supervised or co-supervised by A/Prof Ong)

• Best Presenter Award (by Zhou Wei), 8th International Symposium on Multimodal Transportation, Guangzhou, China, 2025. (sole supervisor)
• Best Presentation Runner-Up Award (by Bai Qiaowen), 14th Asia Pacific Conference on Transportation and the Environment, Hangzhou, China, 2025. (sole supervisor)
• Best Student Paper Award (by Zhou Wei), 7th International Symposium on Multimodal Transportation, China, 2024. (sole supervisor)
• Best Poster Award (by He Meibo), 5th International Water Association Resource Recovery Conference (IWARRC 2023), Shenzhen, China, 2023. (sole supervisor)
• Best Student Paper Award (by Cai Yutong), 4th International Symposium on Multimodal Transportation, China, 2021. (co-supervisor with Prof Meng Qiang)
• Outstanding Presentation Award (by Zhou Yu), 2nd Next Generation Transportation Systems Conference (NGTS-2), USA, 2020. (co-supervisor with Prof Meng Qiang)
• Best Student Poster Award (by Hua Wen), 8^th International Association of Chinese Infrastructure Professionals (IACIP) Workshop, USA, 2018. (sole supervisor)
• NUS Faculty of Engineering 31^st Innovation and Research Award – Certificate of Merit (by Lim Jun Han and Xu Weiyuan Sherman), 2017. (sole supervisor)

Teaching

• College of Design and Engineering Teaching Excellence Award, 2026.
• Faculty of Engineering Teaching Honour List, 2018.
• Faculty of Engineering Teaching Commendation, 2015, 2016, and 2017.

Service

• IES Active Volunteer Award, Institution of Engineers Singapore, 2025.
• Quality and Standards Commendation Award, Singapore Standards Council, 2022.
• Singapore Accreditation Council Assessor Award (Distinguished), 2020.
• Singapore Accreditation Council Assessor Award (Gold), 2017.
• Certificate of Appreciation. International Society of Maintenance and Rehabilitation of Transport Infrastructures (iSMARTi), 2017.
• ASCE Journal of Transportation Engineering Outstanding Reviewer, 2015.
• Singapore Accreditation Council Assessor Award (Silver), 2015
• Singapore Accreditation Council Assessor Award (Bronze), 2014.
• Certificate of Appreciation. Institution of Engineers Singapore, 2013.
• ASCE Journal of Transportation Engineering Outstanding Reviewer. 2011.

Others

• NUS President Graduate Fellowship, 2005-2006.
• Singapore Structural Steel Society Book Prize, 2003.

Professional Activities

International

• Executive Vice President, International Society of Maintenance and Rehabilitation of Transportation Infrastructures (iSMARTi).
• Chair, Technical Committee on Economics and Finance, American Society of Civil Engineers (ASCE), Transportation and Development Institute (T&DI).
• Topic Group Chief (Highway Design and Maintenance), Eastern Asian Society for Transportation Studies (EASTS).
• Co-Chair, GL0102 Technical Committee on Functional Asphalt and Polymer-based Pavement, World Transport Convention, China Highway and Transport Society.
• Member, D04 Road and Paving Materials Committee and E17 Vehicle-Pavement Interaction Committee, American Society for Testing and Materials.
• Member, AT020 International Trade and Transportation Committee, Transportation Research Board of the National Academies.
• Former Member (serving three 3-year terms – maximum allowed as per TRB policy), AFD90 Surface Properties-Vehicle Interaction Committee and AV070 Airport/Aircraft Compatibility Committee, Transportation Research Board of the National Academies.

National

• Vice Chairman, Singapore Road Safety Council.
• Vice President, Pavement Engineering Society, Singapore.
• Member, Panel of Technical Advisors, Land Transport Authority, Singapore.
• Member, Council Committee for Laboratory – Engineering (CCL-E), Singapore Accreditation Council.
• Co-Chair (Outreach), Transportation Systems Sub-Committee, Railway and Transportation Technical Committee, Institution of Engineers Singapore.
• Co-convenor, TR68 Technical Reference on Autonomous Vehicles Part 5: Working Group on Human Vehicle Interface, Enterprise Singapore.
• Member, Technical Committee on Railway Systems and Technical Committee on Intelligent Transportation Systems, Singapore Standards Council.
• Member, National Mirror Working Group (NMWG) IEC TC9 on Electrical Equipment and Systems for Railway, Singapore Standards Council.
• Technical Assessor, Singapore Accreditation Council.

Editorial Board of Journals

• Associate Editor, Cleaner Materials.
• Associate Editor, International Journal of Transportation Science & Technology.
• Associate Editor, Asian Transport Studies.
• Associate Editor, Asia Journal of Civil Engineering
• Editorial Board Member, Transportation Research Part E: Transportation and Logistics Review
• Editorial Board Member, Scientific Reports.
• Editorial Board Member, Journal of Road Engineering.
• Guest Editor, Multimodal Transportation.
• Guest Associate Editor, Frontiers in Built Environment.
• Guest Editor, Asian Transport Studies (Vol. 4, No. 4, 2017 – Special Issue on “Advancement in Traffic Safety Studies: From Theory to Practice).

Recent Conferences (past three years)

• Co-Chair, 6th International Symposium on Multimodal Transportation, Singapore, 2026.
• Scientific Program Committee Member, 2nd International Conference on Sustainable Airport Pavement Management, Singapore, 2026.
• International Scientific Committee Member, 11th International Conference on Transportation and Logistics (TLOG-2024), Shenzhen, China, 2026.
• Chair, 4th International Competition for Intelligent Simulation of Transport Infrastructure (4th ICISTI), Singapore, 2025.
• Co-Chair, 5th International Symposium on Multimodal Transportation, Guangzhou, China, 2025.
• International Scientific Committee Member, 16th International Conference of Eastern Asia Society for Transportation Studies (EASTS), Surakarta, Indonesia, 2025.
• International Scientific Committee Member, 3rd International Symposium on Pavement Functional Design and Management (PFDM), Delft, Netherlands, 2025.
• Chair, 13th Asia Pacific Conference on Transportation and Environment, Singapore, 2024.
• International Scientific Committee Member, 10th International Conference on Transportation and Logistics (TLOG-2024), Colombo, Sri Lanka, 2024.

Teaching Areas

• Transportation engineering
• Design of land transport infrastructures
• Pavement design and rehabilitation
• Pavement management systems
• Transport infrastructure asset management
• Transportation planning
• Analysis and design of civil engineering experiments

Research Interests

• Pavement engineering
• Multimodal transport infrastructures and operations

Selected Publications

Recent Articles in Journals(past three years)

Pavement engineering

1. Qu, Z., Yu, Q., Cardinaels, R., Ong, G. P. and Geng, G. (2023) “3D printing concrete containing thermal response gelatin: towards cold environment applications”, Cement and Concrete Research, 140, 105029.
2. Fu, G., Zhao Y., Ong, G. P., Wang, Y., and Lu, J. (2023) “Effect of transverse cracks on the backcalculated layer properties of asphalt pavements from non-destructive testing data”, Journal of Nondestructive Evaluation, 42, 69.
3. Yang, Y., Zhu, X., Jelagin, D., Guarin, A., and Ong, G. P. (2023) “Numerical analysis of hydroplaning and veer-off risk of dual-tire on a wet runway”, International Journal of Pavement Engineering, 24(1), 2229479.
4. Jitsangiam, P., Nusit, K., Teeratitayangkul, P., Ong, G. P., and Theinchai, C. (2023) “Development of a modified Marshall mix design for hot-mix asphalt concrete mixed with recycled plastic based on dry mixing processes”, Construction and Building Materials, 404, 133127.
5. Zhang, Z., Ong, G. P. and Goh, S. H. (2023) “An exploratory framework for accelerated pavement testing using geotechnical centrifuge modelling”, International Journal of Pavement Engineering, 24(1), 2263807.
6. Qu, Z.†, L. Pel, Ong, G. P., Geng, G. (2023) “Early age hydration and micro-structure evolution of fast setting cement”, Cement and Concrete Research, 174, 107343.
7. Lou, K.†, Xiao, P., Ong, G. P.*, Li, B., Kang, A., and Wu, Z. (2024) “Micromechanical behavior of the interface between single fiber and asphalt mastic based on the designed innovative pullout test”, Construction and Building Materials, 414, 134873.
8. Jagadeesh, A., Ong, G. P. and Su, Y. M. (2024) “Bridging field and laboratory permeabilities of pervious concrete mixtures using XRCT-based numerical modelling”, ASCE Journal of Materials in Civil Engineering, 36(4), 04024026.
9. Hao, G., He, M., Lim, S. M., Ong, G. P., Zulkati, A., and Kapilan, S. (2024) “Recycling of plastic waste in porous asphalt pavement: engineering, environmental, and economic implications”, Journal of Cleaner Production, 440, 140865.
10. Wong, D. Y. C., Khan, Q., Lu, Q., Ng, Y. C. H., Geng G., and Ong, G. P. (2024) “Maturity-based method of early strength characterization of rapid setting cements”, ASCE Journal of Materials in Civil Engineering, 36(9), 04024259.
11. Lim, S. M., He, M., Hao, G., Ng, T. C. A., and Ong, G. P. (2024) “Recyclability potential of waste plastic-modified asphalt concrete with consideration to its environmental impact”, Construction and Building Materials, 439, 137299.
12. Fu, G., Cao, D., Ong, G. P., Wang, J., and Sha, D. (2024) “A viscoelastic wave propagation approach for dynamic backcalculation of layer properties of asphalt pavements under an impact load”, Computers and Geotechnics, 176, 106752.
13. Bai, Q., Ong, G. P., Seet, J. S. S. and Wang, X. (2024) “Differential Public Support for Disposable Plastic Bag Charge in Singapore: Insights from Latent Class Segmentation”, Journal of Cleaner Production, 477, 143803.
14. Cai, J., Wu, D., Zhao, H., Ong, G. P., and Zhao, L. (2024) “Assessing braking performance on wet-road through water-depth estimation and vehicle-pavement dynamic simulation”, International Journal of Pavement Engineering, 25(1), 2421896.
15. Hao, G., Lim, S. M., He, M., Ong, G. P., Zulkati, A., Kapilan, S., and Tan, J. H. (2025) “Long-term performance of porous asphalt pavement incorporating recycled plastics”, Resources, Conservation and Recycling, 212, 107979.
16. Lim, S. M., Ng, T. C. A., Amio, B. E. C., Kapilan, S., Ng, H. Y., and Ong, G. P. (2025) “Refining leaching protocols of waste plastic incorporated asphalt mixes for environmental impact assessment”, Journal of Cleaner Production, 487, 144610.
17. Yin, P., Ong, G. P., Pan, B., Li, Z., and Sha, D. (2025) “Effect of phosphogypsum whisker as a sustainability modifier on the performance of asphalt and its mixture: Insight from an organic coating method”, Journal of Materials in Civil Engineering, 37(3), 04024022.
18. Yang, X., Yan, J., Fan, Z., Wang, Y., Ong, G. P. and Wang, D. (2025) “Design of electromagnetic road markings for implementing 77 GHz millimetre-wave radar sensing”, IEEE Transaction on Intelligent Transportation System, 26(10), 17150-17160.
19. Singh, J., Jagadeesh, A. and Ong, G. P. (2025) “Mechanistic empirical homogenisation of British pendulum testers”, International Journal of Pavement Engineering, 26 (1), 2534669.
20. Han, Z., Ong, G. P. Li, M., Liu, L., and Sun, L. (2025) “An innovative stage mixing approach for emulsified asphalt cold recycled mixtures”, Construction and Building Materials, 494, 143431.
21. Sha, D., Huang, C., Wang, B., Pan, B.* and Ong, G. P. (2025) “Influence of thermal and ambient curing on the properties and the microstructural features of geopolymers from coal-based synthetic natural gas slag”, Journal of Testing and Evaluation, 53(6), 1564-1583.
22. Chen, Z., Zhang, H., Yang, X., Luo, Y., and Ong, G. P. (2025) “Comparing rheological and chromatographic molecular weight distributions in asphalt aging and rejuvenation assessment”, Construction and Building Materials, 504, 144662.
23. Yang, X., Ong, G. P., Chen, Z., Luo, Y., Zeng, H., and Zhang, H. (2025) “Cooling and mechanical performance of a novel cooling asphalt mixture incorporating radiative cooling material-coated aggregate”, Construction and Building Materials, 505, 144775.
24. Zeng, S., Ong, G. P., Xu, S., Liu, H., Liu, L., and Yu, J. (2026) “Eco-friendly asphalt: emission reduction and performance enhancement with a novel fume suppressant”, Transportation Research Part D: Transport and Environment, 152, 105193.
25. Meng, Y., Ouyang, J., Ong, G. P. and Ou, J. (2026) “Fracture behaviour of asphalt emulsion warm mix recycled asphalt mixtures incorporating high RAP contents and rejuvenator”, Journal of Materials in Civil Engineering, 38(4), 21864.
26. Xia, W., Zhu, Q., Ong, G. P. and Teng, W. (2026) “Soot-inhibition mechanism of composite flame retardant during porous asphalt mixture combustion in a tunnel fire”, Construction and Building Materials, 514, 145527.
27. Hao, G., Ong, G. P. and He, M. (2026) “Asphalt emissions during pavement construction: A comprehensive review on analytical metrics, methods and influencing factors”, Transportation Research Record, 2680(3), 262-285.
28. Fu, G., Qiu, W., Han, Z., Wang, Z., and Ong, G. P. (2026) “Consistency and accuracy of static and dynamic backcalculation for airport rigid pavements: A laboratory validation”, International Journal of Pavement Engineering, 27(1), 2658665.
29. Yu, M., Li, L., He, Y., Jin, D., Yang, J., Yang L., and Ong, G. P. (2026) “Performance and durability investigation of an innovative high friction surface prepared with the bauxite chamotte aggregates”, Surface and Interfaces, 95, 109648.

Multimodal transport infrastructures and operations

1. Cai Y., Meng, Q. and Ong, G. P. (2023) “Bicycle sharing station planning: From free-floating to geo-fencing”, Transportation Research Part C: Emerging Technologies, 147, 103990.
2. Zhou Y., Ong, G. P. and Meng, Q. (2023) “The road to electrification: Bus fleet replacement strategies”, Applied Energy, 337, 120903.
3. Zhou, Y., Meng, Q., Ong, G. P. and Cui, H. (2023) “Electric bus charging facility planning with uncertainties: Model formulation and algorithm design”, Transportation Research Part C: Emerging Technologies, 150, 104108.
4. Khoo, H. L. and Ong, G. P. (2023) “A study on mode shift model with active travel demand policies using Bayesian network modelling approach”, Travel Behaviour and Society, 33, 100635.
5. Cai Y., Ong, G. P. and Meng, Q. (2023) “Understanding bike-sharing as a commute mode in Singapore: An agent-based simulation approach”, Transportation Research Part D: Transport and Environment, 122, 103859.
6. Bai, Q. and Ong, G. P. (2023) “Similarity-based method for bus services assignment at a staggered bus stop”, Transportation Research Part E: Logistics and Transportation Review, 179, 103315.
7. Zhou, Y., Meng, Q., Ong, G. P. and Wang, H. (2024) “Electric bus charging scheduling on a bus network”, Transportation Research Part C: Emerging Technologies, 161, 104553.
8. Cai Y., Ong, G. P. and Meng, Q. (2024) “Sidewalk-based bicycle path network design incorporating equity in cycling time”, Computer Aided Civil and Infrastructure Engineering, 39(20), 3009-3184.
9. Zhang, Z., Chen, S, Yao, H., Ong, G. P., Ma, Y., and Qiao, F. (2024) “Recognition of Aggressive Driving Behavior under Abnormal Weather Based on Convolutional Neural Network and Transfer Learning”, Traffic Injury Prevention, 25(8), 1039-1047.
10. Liu, J., Chan, M. S., and Ong, G. P. (2024) “Modelling COVID-19 travel rebound with automated land use identification and mixed effect models”, Transportation Research Part A: Policy and Practice, 190, 104280.
11. Bai, Y., Tu, P. and Ong, G. P. (2025) “An extended intelligent driving model for autonomous and manual driven vehicles in a mixed traffic environment with consideration to roadside crossing”, International Journal of Transportation Science and Technology, 17, 375-391.
12. Zubair, M., Chen, S., Ma, Y., Ong, G. P. and Pang, Q. (2025) “Explore driving factors to energy consumption of electric vehicles based on structural equation modelling”, International Journal of Green Energy, 22(9), 1755-1765.
13. Liu, J.† and Ong, G. P. (2025) “Prediction of next-time traffic congestion with consideration of congestion propagation patterns and co-occurrence”, IEEE Transactions on Vehicular Technology, 74(11), 16978-16989.
14. Hussain, A., Chen, S., Shaikh, S., Ullah, I., and Ong, G. P. (2025) “Exploring the non-linear relationship between driving behavior and vehicle fuel consumption using long short-term memory”, International Journal of Sustainable Transportation, 19(12), 1073-1090.
15. Zhou, W., Ong, G. P., and Dai, F. (2025) “Understanding the role of perceived and physical environments in older adults’ physical activity: Toward more inclusive and resilient cities”, Sustainable Cities and Society, 134, 106954.
16. Bai, Q., Zhu, D. and Ong, G. P. (2026) “Emission performance of electric and hydrogen fuel cell buses: A simulation-based well-to-wheel comparative study under different operating conditions”, Energy, 345, 140169.
17. Cui, T., Ma, Y., Chen, S., Xing, G., Zhang, H., and Ong, G. P. (2026) “Identification and interpretation of aggressive driving behavior under time pressure”, Transportation Research Record, 2680(6), 406-420.
18. Zhang, J., Ma, Y., Xing, G., Xing, Y., Ong, G. P. and Chen, S.† (2026) “Effect of system operational transparency on driver trust and takeover behavior in a conditional automated driving environment”, Transportation Research Part F: Traffic Psychology and Behaviour, 121, 103683.

Recent Conference Papers/Presentations (past three years)

Pavement engineering

1. Jagadeesh, A., Ong, G. P. and Su, Y. M. (2023) “Investigation of field non-Darcy permeability in pervious pavements using XRCT-based finite volume simulations”, 102nd Transportation Research Board Annual Meeting, 8-12 January 2023, Washington D.C, USA.
2. Khan, Q., Teh, Z. H. and Ong, G. P. (2023) “An investigation into the strength and stiffness performance of cement-treated aggregate as a base layer for airfield pavements”, ASCE International Airfield and Highway Pavements Conference, 14-17 July 2023, Austin, Texas, USA.
3. Hao, G., Lim, S. M., Ong, G. P., He, M., Kapilan, S., Zulkati, A., and Zhan, Z. (2023) “Recycling of plastic waste in porous asphalt pavement and its environmental impacts”, 13th International Conference on Road and Airfield Pavement Technology, 6-8 July 2023, Beijing, China.
4. Lim, S. M., Hao, G., Tan G. L., Zulkati, A., Kapilan, S., Zhan, Z., Nyunt, T. T. and Ong, G. P. (2023) “Investigation of long-term performance of waste plastics modified asphalt mixtures”, 2nd International Conference on Maintenance and Rehabilitation of Infrastructure Facilities (MAIREINFRA), 16-19 August 2023, Honolulu, Hawaii, USA.
5. Lim, S. M., Hao, G., Tan, G. L., Ong, G. P., Zulkati, A., and Zhan, Z. (2023) “Long-term performance of recycled waste plastics modified asphalt concrete”, Proceedings of 13th International Conference for Eastern Asian Society for Transportation Studies (EASTS), 4-7 September 2023, Shah Alam, Malaysia.
6. He, M., Shu, C., Hao, G., Lim, S. M., Ng, T. C. A., Ong, G. P., Huang, Z., Ng, H. Y., Kapilan S.,Zulkati, A. and Zhan, Z. (2023) “Recycle and reuse of plastics in asphalt pavement: Evaluating microplastic leachability”, 5th International Water Association (IWA) Resource Recovery Conference, 1-3 November 2023, Shenzhen, China. (Best poster presentation award)
7. Hao, G., Lim, S. M., Ong, G. P., Zulkati, A., and Zhan, Z. (2023) “Evaluation of long-term performance of asphalt mixture incorporating plastic wastes”, 27th International Conference of Hong Kong Society of Transportation Studies, 11-12 December 2023, Hong Kong.
8. Lim, S. M., Hao, G., He, M., and Ong, G. P. (2024) “Field study on performance and environmental impact of Singapore roads with recycled plastic waste”, ASCE International Conference on Transportation and Development, 15-18 June 2024, Atlanta, Georgia, USA.
9. Fu, G. and Ong, G. P. (2024) “Effects of longitudinal crack on the FWD data of asphalt pavement with granular base.” In: Pereira, P., Pais, J. (eds) Proceedings of the 10th International Conference on Maintenance and Rehabilitation of Pavements (MAIREPAV 2024). Lecture Notes in Civil Engineering, 523, 151-159. Springer, Cham.
10. Vontivillu, B. J., Khoo, L. I., and Ong, G. P. (2024) “Cement treated base at Singapore Changi Airport: From ideation to instrumented trials and implementation”, 1st International Conference on Sustainable Airport Pavement Management, 24-25 September 2024, Singapore.
11. Lim, T. Y. and Ong, G. P. (2024) “PCN to PCR: Changi’s challenges and methodology”, 1st International Conference on Sustainable Airport Pavement Management, 24-25 September 2024, Singapore.
12. Lim, S. M., He, M., Hao, G., and Ong, G. P. (2025) Laboratory evaluation of the recyclability potential of recycled plastic-modified asphalt concrete and its environmental impact. In: Rujikiatkamjorn, C., Xue, J., Indraratna, B. (eds) Proceedings of the 5th International Conference on Transportation Geotechnics (ICTG) 2024, Vol 7. ICTG 2024. Lecture Notes in Civil Engineering, 408, 331-342. Springer Singapore.
13. Lim, S. M., Singh, J., Chen, Z., and Ong, G. P. (2025) “Relationship between ambient conditions and surface pavement temperature in airport asphalt mixtures”, ASCE Pavement Conference 2025, 8-11 June 2025, Glendale, Arizona, USA.
14. Fu, G., Qiu, W., Han, Z., Wang, Z. and Ong, G. P. (2025) “A comparative study of static and dynamic backcalculation methods in the assessment of airport rigid pavements”, World Transport Convention 2025, 12 June 2025, Suzhou, China.
15. Li, B., Wang, Z. and Ong, G. P. (2025) “Vehicle-specific parameters estimation based on traffic surveillance camera”, World Transport Convention 2025, 12 June 2025, Suzhou, China.
16. Qiu, W., Fu, G., Wang, Z., and Ong, G. P. (2025) “Backcalculation of viscoelastic properties of asphalt pavement from FWD data using deep residual network”, World Transport Convention 2025, 12 June 2025, Suzhou, China.
17. Zhang, Y., Chen, Z., Lim, S. M. and Ong, G. P. (2025) “Compatibility and rheological properties of recycled plastic-modified asphalt: High temperature resistance and anti-aging performance”, World Transport Convention 2025, 12 June 2025, Suzhou, China.
18. Chen, Z. and Ong, G. P. (2025) “Comparison of different apparent molecular weight distributions in asphalt aging and rejuvenation assessment and their relationships to binder performance-related properties”, 14th International Conference on Road and Airfield Pavement Technology (ICPT), 16-18 July 2025, Chiang Mai, Thailand.
19. Singh, J. and Ong, G. P. (2025) “Finite element method-based prediction of British pendulum number using pavement texture data”, 14th International Conference on Road and Airfield Pavement Technology (ICPT), 16-18 July 2025, Chiang Mai, Thailand.
20. Lim, S. M., Chan, R. J. S., and Ong, G. P. (2025) “Effect of waste glass and recycled plastic on properties of dense asphalt concrete”, 14th International Conference on Road and Airfield Pavement Technology (ICPT), 16-18 July 2025, Chiang Mai, Thailand.
21. Qiu, W., Fu, G., Wang, Z. and Ong, G. P. (2025) “Backcalculation of viscoelastic properties of asphalt pavement from FWD data using deep residual network”, 14th International Conference on Road and Airfield Pavement Technology (ICPT), 16-18 July 2025, Chiang Mai, Thailand.
22. Ong, J. H. W. and Ong, G. P. (2025) “Assessment of cycling infrastructure condition through novel instrumented probe bicycles”, 14th International Conference on Road and Airfield Pavement Technology (ICPT), 16-18 July 2025, Chiang Mai, Thailand.

Multimodal transport infrastructures and operation

1. Yan, B. and Ong, G. P. (2023) “Train schedule template management at sea-rail intermodal Container Terminals”, ASCE International Conference on Transportation and Development (ICTD), 14-17 June 2023, Austin, Texas, USA.
2. Ong, G. P. (2023) “Evolution of public bus and rail infrastructure financing in Singapore”, ASCE International Conference on Transportation and Development (ICTD), 14-17 June 2023, Austin, Texas, USA.
3. Ong, G. P. (2023) “Multimodal transport infrastructure and operations design for a liveable city: Case study of Singapore”, 13th International Conference for Eastern Asian Society for Transportation Studies (EASTS), 4-7 September 2023, Shah Alam, Malaysia.
4. Yan, B. and Ong, G. P. (2023) “Influence of subjective and objective factors on elderly mobility: A case study of Singapore”, 27th International Conference of Hong Kong Society of Transportation Studies, 11-12 December 2023, Hong Kong.
5. Zhou, W., Ong, G. P., Chadney, M., Rathore, S., Astari, F., Faizal, F., and Zhang, Y. (2024) “Electric vehicles (EVs) – The future of gas stations in Southeast Asian cities”, 103rd Transportation Research Board Annual Meeting, 7-11 January 2024, Washington D.C, USA.
6. Ong, G. P. (2024) “Converting a conventional bus fleet to an electric bus fleet: Economics, financing and implementation”, ASCE International Conference on Transportation and Development, 15-18 June 2024, Atlanta, Georgia, USA.
7. Zhou, W., Ong, G. P., Chadney, M., Rathore, S., Astari, F., Faizal, F. and Zhang, Y. (2024) “The future of petrol stations in an electric vehicle (EV) world – How can cities in Southeast Asia (SEA) analyse, re-evaluate and re-purpose their petrol station”, 13th Asia Pacific Conference on Transportation and the Environment, 8-10 July 2024, Singapore.
8. Zhou, W. and Ong, G. P. (2024) “Investigating the influencing factors of working from home during the COVID-19 pandemic”, 13th Asia Pacific Conference on Transportation and the Environment, 8-10 July 2024, Singapore.
9. Bai, Q. and Ong, G. P. (2024) “Assess the impact of cargo transhipment on the road network: Case study in Singapore”, 10th International Conference on Transportation and Logistics (T-LOG 2024), 5-7 August 2024, Colombo, Sri Lanka.
10. Zhou, W. and Ong, G. P. (2024) “Building level accessibility in a 20-minute city: A case study of Singapore”, 6th International Symposium on Multimodal Transportation, 27-29 September 2024, Nanjing, China. (Best student presentation award)
11. Zhou, W. and Ong, G. P. (2024) “Examining elderly activity in Singapore: The role of perceived and physical accessibility”, 28th International Conference of Hong Kong Society of Transportation Studies, 9-10 December 2024, Hong Kong.
12. Ong, G. P. (2025) “Road to electrification: Bus fleet replacement strategies”, ASCE International Conference on Transportation and Development (ICTD) 2025, 8-11 June 2025, Glendale, Arizona, USA.
13. Zhou, W. and Ong, G. P. (2025) “Building-level accessibility in a 20-minute town: A case study of Singapore”, ASCE International Conference on Transportation and Development (ICTD) 2025, 8-11 June 2025, Glendale, Arizona, USA.
14. Zhu, D., Bai, Q. and Ong, G. P. (2025) “Environment-economic comparison of electric and hydrogen fuel cell buses: Well-to-wheel driving cycle simulations”, 14th Asia Pacific Conference on Transportation and the Environment, 9-11 August 2025, Hangzhou, China.
15. Hu, B., Chen, S., Ma, Y., and Ong, G. P. (2026) “Identification and interpretation of driving behavior and vehicle dynamics for energy saving of electric vehicles based on XGBoost and SHAP”, 105th Transportation Research Board Annual Meeting, 11-15 January 2026, Washington DC, USA.