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Dr Konstantinos Gkiotsalitis

Assistant Professor

PhD (NTUA), MSc (Imperial College London and UCL), MEng (NTUA)

Contact Details

Address: Office 119, NTUA Campus, Iroon Polytechniou 5, GR-15773 Athens, Greece.
Email: KGkiotsalitis@civil.ntua.gr
Phone: (+30) 210 772 1286
Scopus: https://www.scopus.com/authid/detail.uri?authorId=56404651600

Profile

Dr Konstantinos Gkiotsalitis is Assistant Professor and Director of the Railways and Transport Laboratory at the National Technical University of Athens. His research focuses on public transport planning, railway planning and operations, transport planning, fleet management and operations research. From 2012 until 2018 he was conducting transportation R&D at NEC Laboratories Europe (Heidelberg, Germany) with a specific focus on EU and APAC markets. From 2018 until 2022 he was appointed Assistant Professor to the University of Twente, The Netherlands.

He received his Ph.D. from the National Technical University of Athens on unveiling the mobility patterns of individuals and matching the transportation supply with the travel demand. He also received his bachelor’s degree in Civil Engineering from the National Technical University of Athens and his MSc in Transport and Sustainable Development from Imperial College London and University College London.

He has been involved in several EU and international projects on smart cities, urban mobility, public transport operations, logistics, railway engineering and shared mobility, and has several patent applications in the aforementioned areas. He serves as Editor at Transportation Research Part C: Emerging Technologies, Transportation Research Record, Journal of Public Transportation, npj Sustainable Mobility and Transport, and he is the Review Coordinator of the Transit Management and Performance committee (AP010) at the Transportation Research Board. He is the author of the book Public Transport Optimization, Springer Nature, and has co-authored more than 60 publications to peer-reviewed scientific journals.

Professional Experience
  • 2022-current: Assistant Professor, Department of Transportation Planning and Engineering, School of Civil Engineering, National Technical University of Athens.
  • 2018-2022: Assistant Professor, Transport Engineering and Management, Faculty of Engineering Technology, University of Twente.
  • 2015-2018: Research Scientist, Data Science Applications Group, NEC Laboratories Europe, Heidelberg, Germany.
  • 2012-2015: Research Associate, Intelligent Transport Systems Group, NEC Laboratories Europe, Heidelberg, Germany.
Education
  • PhD in the optimal selection of transport modes for leisure activities, National Technical University of Athens.
  • MSc in Transport and Sustainable Development, Imperial College London and University College London.
  • MEng (5-year diploma) in Civil Engineering, National Technical University of Athens.
Editorial
  • Handling Editor: Transportation Research Record
  • Editorial Board Member: Journal of Public Transportation
  • Editorial Board Member: npc Sustainable Mobility and Transport
  • Early Career Editorial Advisory Board Member: Transportation Research Part C: Emerging Technologies
  1. K. Gkiotsalitis (2023): “Public Transport Optimization”, Springer Nature, https://link.springer.com/book/10.1007/978-3-031-12444-0
  1. Chen, X., Chen, X., Ma, J., Gkiotsalitis, K., & Yu, L. (2025). Design of Flexible Transit with Multitype Stations Considering Spatiotemporal Heterogeneity. Journal of Transportation Engineering, Part A: Systems, 151(1), 04024089. https://doi.org/10.1061/JTEPBS.TEENG-854
  2. Theodoreskos, K., & Gkiotsalitis, K. (2024). Multi-Objective Routing and Categorization of Urban Network Segments for Cyclists. Appl. Sci. 2024, 14, 10664. https://doi.org/10.3390/app142210664
  3. Farahmand, Z. H., Gkiotsalitis, K., & Geurs, K. T. (2024). Optimal bus reassignment considering in-vehicle overcrowding. Transportation Research Interdisciplinary Perspectives, 28, 101260. https://doi.org/10.1016/j.trip.2024.101260
  4. Cortenbach, L.E., Gkiotsalitis, K., van Berkum, E.C., & Walraven, E. (2024). The dial-a-ride problem with meeting points: a problem formulation for shared demand responsive transit. Transportation Research Part C: Emerging Technologies. Volume 169, December 2024, 104869. https://doi.org/10.1016/j.trc.2024.104869
  5. Nisyrios, E., Amorim, M. R. S., Cantelmo, G., Gkiotsalitis, K., & Antoniou, C. (2024). Impact assessment of future fleet compositions in vehicle emissions in urban areas: A methodological framework and a case study. Case Studies on Transport Policy, 101285. https://doi.org/10.1016/j.cstp.2024.101285
  6. Liu, T., You, H., Gkiotsalitis, K., & Cats, O. (2024). Human-Machine collaborative decision-making approach to scheduling customized buses with flexible departure times. Transportation Research Part A: Policy and Practice, 187, 104184. https://doi.org/10.1016/j.tra.2024.104184
  7. de Weert, Y. R., Gkiotsalitis, K., & van Berkum, E. C. (2024). Improving the scheduling of railway maintenance projects by minimizing passenger delays subject to event requests of railway operators. Computers & Operations Research, 106580. https://doi.org/10.1016/j.cor.2024.106580
  8. Chau, M. L., Koutsompina, D., & Gkiotsalitis, K. (2024). The Electric Vehicle Scheduling Problem for Buses in Networks with Multi-Port Charging Stations. Sustainability, 16(3), 1305. https://doi.org/10.3390/su16031305
  9. K. Geurs, A. Grigolon, K. Münzel, K. Gkiotsalitis, D. Duran-Rodas, B. Büttner, C. Kirchberger, J. Pappers, L. Martinez Ramirez, A. Graf, J. Hansel, R. Gkrava, R. Klementschitz (2024): “The Smarthubs integration ladder: a conceptual model for the categorisation of shared mobility hubs“, Transport Reviews, https://doi.org/10.1080/01441647.2023.2239499
  10. Gkiotsalitis, K., & Nikolopoulou, A. (2023). The multi-vehicle dial-a-ride problem with interchange and perceived passenger travel times. Transportation Research Part C: Emerging Technologies, 156, 104353. https://doi.org/10.1016/j.trc.2023.104353
  11. Gkonou, N., Nisyrios, E., & Gkiotsalitis, K. (2023). Combined Optimization of Maintenance Works and Crews in Railway Networks. Applied Sciences, 13(18), 10503. https://doi.org/10.3390/app131810503
  12. T. Liu, W. Ji, K. Gkiotsalitis, O. Cats (2023): “Optimizing public transport transfers by integrating timetable coordination and vehicle scheduling“, Computers & Industrial Engineering, 184, 109577, https://doi.org/10.1016/j.cie.2023.109577
  13. K. Gkiotsalitis, O. Cats, T. Liu, J.M. Bult (2023): “An exact optimization method for coordinating the arrival times of urban rail lines at a common corridor“, Transportation research. Part E: Logistics and Transportation Review, 178, 103265, https://doi.org/10.1016/j.tre.2023.103265
  14. C. Iliopoulou, C. Karolemeas, K. Gkiotsalitis, K. Kepaptsoglou (2023): “Electric taxi licensing under a tradable credit scheme: model and application”, Transportation Planning and Technology, https://doi.org/10.1080/03081060.2023.2224311
  15. Z.H. Farahmand, K. Gkiotsalitis, K.T. Geurs (2023): “Predicting bus ridership based on the weather conditions using deep learning algorithms”, Transportation Research Interdisciplinary Perspectives, vol. 19, 100833, https://doi.org/10.1016/j.trip.2023.100833
  16. S. Asgarpour, A. Hartmann, K. Gkiotsalitis (2023): “Infrastructure investment planning through scenario-based system-of-systems modelling”, Transportation Planning and Technology, https://doi.org/10.1080/03081060.2023.2196987
  17. M. Filgueiras, K. Gkiotsalitis, O. Cats, M. Yap, A. Lobo, S. Ferreira (2023): “Bus Network Design and Frequency Setting in the Post-COVID-19 Pandemic: The Case of London”, ASCE Journal of Transportation Engineering, Part A: Systems, 149(4): 04023020, https://doi.org/10.1061/JTEPBS.TEENG-7176
  18. S. Asgarpour, A. Hartmann, K. Gkiotsalitis, R. Neef (2023): “Scenario-based strategic modeling of road transport demand and performance”, Transportation Research Record, https://doi.org/10.1177/03611981221143377
  19. B. Buurman, K. Gkiotsalitis, E.C. Van Berkum (2023): “Railway maintenance reservation scheduling considering detouring delays and maintenance demand”, Journal of Rail Transport Planning & Management, 25, p.100359, https://doi.org/10.1016/j.jrtpm.2022.100359
  20. K. Gkiotsalitis, C. Iliopoulou, K. Kepaptsoglou (2023): “An exact approach for the multi-depot electric bus scheduling problem with time windows”, European Journal of Operational Research (EJOR), 306, 1, 189-206, https://doi.org/10.1016/j.ejor.2022.07.017
  21. K. Gkiotsalitis, T. Liu (2022): “Periodic optimization of bus dispatching times and vehicle schedules considering the COVID-19 capacity limits: a Dutch case study”, Transportation Research Record, 1-13,  https://doi.org/10.1177/03611981221114119
  22. J.S. Horjus, K. Gkiotsalitis, S. Nijënstein, K.T. Geurs (2022): “Integration of shared transport at a public transport stop: mode choice intentions of different user segments at a mobility hub”, Journal of Urban Mobility, 2, 100026, https://doi.org/10.1016/j.urbmob.2022.100026
  23.  K. Gkiotsalitis, O. Cats, T. Liu (2022): “A review of public transport transfer synchronisation at the real-time control phase”, Transport Reviews, 135, 103492, https://doi.org/10.1080/01441647.2022.2035014
  24. K. Gkiotsalitis, M. Schmidt, E. van der Hurk (2022): “Subline frequency setting for autonomous minibusses underdemand uncertainty”, Transportation Research Part C: Emerging Technologies, 135, 103492, https://doi.org/10.1016/j.trc.2021.103492
  25. F. Alesiani, G. Ermis, K. Gkiotsalitis (2022): “Constrained Clustering for the Capacitated Vehicle Routing Problem (CC-CVRP)”, Applied Artificial Intelligence, https://doi.org/10.1080/08839514.2021.1995658
  26. K. Gkiotsalitis (2021): “Coordinating feeder and collector public transit lines for efficient MaaS services”, EURO Journal on Transportation and Logistics, https://doi.org/10.1016/j.ejtl.2021.100057
  27. W. Trommelen, K. Gkiotsalitis, E.C. van Berkum (2021): “Optimization Model for Rail Line Crossover Design Considering the Cost of Delay”, Transportation Research Record, 1-16, https://doi.org/10.1177/03611981211062488
  28. T. Liu, O. Cats, K. Gkiotsalitis (2021): “A review of public transport transfer coordination at the tactical planning phase”, Transportation Research Part C: Emerging Technologies, 133, 103450, https://doi.org/10.1016/j.trc.2021.103450
  29. Z.H. Farahmand, K. Gkiotsalitis, K.T. Geurs (2021): “Mobility-as-a-Service as a transport demand management tool: A case study among employees in the Netherlands”, Case Studies on Transport Policy, https://doi.org/10.1016/j.cstp.2021.09.001
  30. F. Nijland, K. Gkiotsalitis, E.C. van Berkum (2021): “Improving railway maintenance schedules by considering hindrance and capacity constraints”, Transportation Research Part C: Emerging Technologies, 126, 103108, https://doi.org/10.1016/j.trc.2021.103108
  31. Y. de Weert, K. Gkiotsalitis, (2021): “A COVID-19 Public Transport Frequency Setting Model That Includes Short-Turning Options”, Future Transportation, 1(1), 3-20, https://doi.org/10.3390/futuretransp1010002.
  32. K. Gkiotsalitis, (2021): “A model for modifying the public transport service patterns to account for the imposed COVID-19 capacity”, Transportation Research Interdisciplinary Perspectives, https://doi.org/10.1016/j.trip.2021.100336
  33. K. Gkiotsalitis, O. Cats (2021): “Optimal frequency setting of metro services in the age of COVID-19 distancing measures”, Transportmetrica A: Transport Science, https://doi.org/10.1080/23249935.2021.1896593
  34. K. Gkiotsalitis (2021): “Improving service regularity for high-frequency bus services with rescheduling and bus holding”, Journal of Traffic and Transportation Engineering, https://doi.org/10.1016/j.jtte.2020.06.002
  35. K. Gkiotsalitis, O. Cats (2021): At-stop control measures in public transport: Literature review and research agenda. Transportation research. Part E: Logistics and Transportation Review, vol. 145, 102176. https://doi.org/10.1016/j.tre.2020.102176
  36. K. Gkiotsalitis, O. Cats (2020): Timetable Recovery After Disturbances in Metro Operations: An Exact and Efficient Solution. IEEE Transactions on Intelligent Transportation Systems. https://doi.org/10.1109/TITS.2020.3041151 
  37. K. Gkiotsalitis, O. Cats (2020): Public transport planning adaption under the COVID-19 pandemic crisis: literature review of research needs and directions. Transport Reviews. https://doi.org/10.1080/01441647.2020.1857886 
  38. S.Y. ten Have, K. Gkiotsalitis, K.T. Geurs (2020): “Investigating the Future of Ultrafast Charging: A Choice Experiment in the Netherlands.” World Electric Vehicle Journal, 11(4), 70. https://doi.org/10.3390/wevj11040070
  39. X. Karekla, K. Gkiotsalitis, N. Tyler (2020): “The impact of a passenger-safety-driven acceleration limit on the operation of a bus service”, Accident Analysis and Prevention, vol. 148, 105790. https://doi.org/10.1016/j.aap.2020.105790 
  40. K. Gkiotsalitis, E.C. van Berkum (2020): “An analytic solution for real-time bus holding subject to vehicle capacity limits”, Transportation Research Part C: Emerging Technologies, vol. 121, 102815. https://doi.org/10.1016/j.trc.2020.102815 
  41. K. Gkiotsalitis (2020): “Stop-skipping in rolling horizons”. Transportmetrica A: Transport Science, 1-29. https://doi.org/10.1080/23249935.2020.1798554 
  42. K. Gkiotsalitis (2020): “Bus scheduling considering trip-varying travel times, vehicle availability and capacity”. IET Intelligent Transport Systems. https://doi.org/10.1049/iet-its.2019.0725 
  43. K. Gkiotsalitis (2020): “Bus holding of electric vehicles with scheduled charging times”, IEEE Transactions on Intelligent Transportation Systems. https://doi.org/10.1109/TITS.2020.2994538 
  44. B.B.W. Schasfoort, K. Gkiotsalitis, O.A.L. Eikenbroek, E.C. van Berkum (2020): “A dynamic model for real-time track assignment at railway yards”, Journal of Rail Transport Planning & Management, vol.14, 100198. https://doi.org/10.1016/j.jrtpm.2020.100198 
  45. K. Gkiotsalitis (2020): “A model for the periodic optimization of bus dispatching times”, Applied Mathematical Modelling, vol. 82, 785-801. https://doi.org/10.1016/j.apm.2020.02.003 
  46. K. Gkiotsalitis, A. Stathopoulos (2020): “Predicting Traveling Distances and Unveiling Mobility and Activity Patterns of Individuals from Multisource Data”, Journal of Transportation Engineering, Part A: Systems, 146(5). https://doi.org/10.1061/JTEPBS.0000336 
  47. K. Gkiotsalitis, E.C. van Berkum (2020): “An exact method for the bus dispatching problem in rolling horizons”, Transportation Research Part C: Emerging Technologies, vol. 110, 143-165. https://doi.org/10.1016/j.trc.2019.11.009 
  48. K. Gkiotsalitis (2019): “Bus rescheduling in rolling horizons for regularity-based services”, Journal of Intelligent Transportation Systems, Technology, Planning, and Operations. https://doi.org/10.1080/15472450.2019.1681992 
  49. K. Gkiotsalitis, O.A.L. Eikenbroek, O. Cats (2019): “Robust network-wide bus scheduling with transfer synchronizations”, IEEE Transactions on Intelligent Transportation Systems, vol.18, issue 11, 4582-4592. https://doi.org/10.1109/TITS.2019.2941847 
  50. K. Gkiotsalitis, F. Alesiani (2019): “Robust timetable optimization for bus lines subject to resource and regulatory constraints”, Transportation Research Part E: Logistics and Transportation Review, vol. 128, 30-51. https://doi.org/10.1016/j.tre.2019.05.016 
  51. K. Gkiotsalitis, O. Cats (2019): “Multi-constrained bus holding control in time windows with branch and bound and alternating optimization”, Transportmetrica B: Transport Dynamics, vol.7, issue 1, 1258-1285. https://doi.org/10.1080/21680566.2019.1606743 
  52. K. Gkiotsalitis (2019): “Robust Stop-Skipping at the Tactical Planning Stage with Evolutionary Optimization”, Transportation Research Record, 2673(3), 611-623. https://doi.org/10.1177/0361198119834549 
  53. K. Gkiotsalitis, Z. Wu, O. Cats (2019): “A cost-minimization model for bus fleet allocation featuring the tactical generation of short-turning and interlining options”, Transportation Research Part C: Emerging Technologies, (98), 14-36.  https://doi.org/10.1016/j.trc.2018.11.007 
  54. K. Gkiotsalitis, N. Maslekar (2018): “Towards transfer synchronization of regularity-based bus operations with sequential hill-climbing”, Public Transport, 10, 335–361. https://doi.org/10.1007/s12469-018-0178-2 
  55. K. Gkiotsalitis, N. Maslekar (2018): “Multiconstrained timetable optimization and performance evaluation in the presence of travel time noise”, Journal of Transportation Engineering, Part A: Systems, vol. 144, issue 9. https://doi.org/10.1061/JTEPBS.0000181 
  56. K. Gkiotsalitis, O. Cats (2018): “Reliable frequency determination: Incorporating information on service uncertainty when setting dispatching headways”, Transportation Research Part C: Emerging Technologies, 88, 187-207. https://doi.org/10.1016/j.trc.2018.01.026 
  57. K. Gkiotsalitis, R. Kumar (2018): “Bus operations scheduling subject to resource constraints using evolutionary optimization”, Informatics, vol.5, issue 1. https://doi.org/10.3390/informatics5010009
  58. K. Gkiotsalitis, A. Stathopoulos (2016): “Joint leisure travel optimization with user-generated data via perceived utility maximization”, Transportation Research Part C: Emerging Technologies, 68, 532-548. https://doi.org/10.1016/j.trc.2016.05.009 
  59. K. Gkiotsalitis, N. Maslekar (2016): “Dynamic Bus Operations Optimization with REFLEX”, NEC Journal of Artificial Intelligence, vol. 69, no 1, 69-72.
  60. K. Gkiotsalitis, A. Stathopoulos (2016): “Demand-Responsive Public Transportation Rescheduling for adjusting to the Joint Leisure Activity Demand”, International Journal of Transportation Science and Technology (IJTST), Elsevier, vol. 5, issue 2, 68-82. https://doi.org/10.1016/j.ijtst.2016.09.004 
  61. K. Gkiotsalitis, A. Stathopoulos (2015): “A utility-maximization model for retrieving users’ willingness to travel for participating in activities from big-data”, Transportation Research Part C: Emerging Technologies, 58, 265-277. https://doi.org/10.1016/j.trc.2014.12.006 
  62. K. Gkiotsalitis, A. Stathopoulos (2015): “A mobile application for real-time multimodal routing under a set of users’ preferences”, Journal of Intelligent Transportation Systems 19 (2), 149-166. https://doi.org/10.1080/15472450.2013.856712
  63. AHF Chow, Y Li, K. Gkiotsalitis (2015): “Specifications of fundamental diagrams for dynamic traffic modeling”, Journal of Transportation Engineering 141 (9), 04015015. https://doi.org/10.1061/(ASCE)TE.1943-5436.0000781 
  64. K. Gkiotsalitis, AHF Chow (2014): “Significance of fundamental diagrams to first-order macroscopic traffic modelling”, International Journal of Transportation 2 (2), 15-32.  http://dx.doi.org/10.14257/ijt.2014.2.2.02
  1. K. Gkiotsalitis, F. Alesiani, N. Maslekar (2018): “Method and system for providing demand-responsive dispatching of a fleet of transportation vehicles, and a mobility-activity processing module for providing a mobility trace database”, US9953539 (B1), 24 Apr 2018. https://patents.google.com/patent/US9953539B1/en
  2. K. Gkiotsalitis, Z. Wu, O. Cats (2018): “Method for route optimization for demand responsive transportation”, US2018268705 (A1), 20 Sep 2018. https://patents.google.com/patent/US10643478B2/en
  3. K. Gkiotsalitis, O. Cats (2018): “Transportation system and method for allocating frequencies of transit services therein”, DE102017212334 (A1); JP2018022488 (A); JP6406729 (B2), 01 Feb 2018. https://patents.google.com/patent/US20180032964A1/en
  4. K. Gkiotsalitis, N. Maslekar (2016): “Method for providing configuration information for a system comprising a plurality of moving objects”, US2018068238 (A1), 08 Mar 2018. https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2016155790
  5. K. Gkiotsalitis, F. Alesiani (2015): “Method and computer program product for accurate motorway speed control”, EP2994903 (A1); EP2994903 (B1), 16 Mar 2016. https://patents.google.com/patent/EP2994903A1
  6. K. Gkiotsalitis, N. Maslekar (2015): “Dynamic Fleet Routing”, JP2015201006 (A); JP5944431 (B2), 12 Nov 2015. https://patents.google.com/patent/WO2015154831A1/en
  7. K. Gkiotsalitis, F. Alesiani, R. Baldessari (2014): “Method and system for predicting mobility demand of users”, WO2014187476 (A1), 27 Nov 2014. https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2014187476
  8. K. Yuki, R. Leong, K. Gkiotsalitis, N. Maslekar (2014): “Method and apparatus for optimizing efficiency of a transport provider”, SG10201705665P (A), 27 Feb 2019. http://www.ipindia.nic.in/writereaddata/Portal/IPOJournal/1_4842_1/Part-2.pdf
  1. Geurs, K. T., Gkiotsalitis, K., Fioreze, T., Visser, G., & Veenstra, M. (2018): “The potential of a Mobility-as-a-Service platform in a depopulating area in The Netherlands: An exploration of small and big data.” In Advances in Transport Policy and Planning (Vol. 2, pp. 57-79). Academic Press. https://doi.org/10.1016/bs.atpp.2018.09.001
  2. Gkiotsalitis, K., and A. Stathopoulos (2015): “Optimizing leisure travel: Is bigdata ready to improve the joint leisure activities efficiency?.” Engineering and Applied Sciences Optimization. Springer, Cham, 2015. 53-71. https://doi.org/10.1007/978-3-319-18320-6_4
  1. E. Gulcin, F. Alesiani, K. Gkiotsalitis (2021): “Optimization of Collection and Consolidation Operations in Cross-Border Multi-modal Distribution Networks”, 24th IEEE International Conference on Intelligent Transportation Systems
  2. K. Gkiotsalitis (2021): “The Dial-A-Ride Problem considering the in-vehicle crowding inconvenience due to COVID-19”, 24th IEEE International Conference on Intelligent Transportation Systems
  3. K. Gkiotsalitis (2021): “A dynamic stop-skipping model for preventing public transport overcrowding beyond the pandemic-imposed capacity levels”, 10th International Congress on Transportation Research
  4. K. Gkiotsalitis (2021): “Coordinating feeder and collector public transit lines for efficient MaaS services”, Transportation Research Board (TRB) 100th Annual Meeting
  5. K. Gkiotsalitis, M. Schmidt, E. van der Hurk (2021): “Investigating the subline frequency setting problem for autonomous minibusses under demand uncertainty”, Transportation Research Board (TRB) 100th Annual Meeting
  6. F. Nijland, K. Gkiotsalitis, E.C. van Berkum (2021): “Improving railway maintenance schedules by considering hindrance and capacity constraints”, Transportation Research Board (TRB) 100th Annual Meeting
  7. K. Gkiotsalitis, O. Cats (2021): “Optimal frequency setting of metro services in the age of COVID-19 distancing measures”, Transportation Research Board (TRB) 100th Annual Meeting
  8. K. Gkiotsalitis (2021): “Modifying the service patterns of public transport vehicles to account for the COVID-19 capacity”, Transportation Research Board (TRB) 100th Annual Meeting
  9. J. Voorhorst, K. Gkiotsalitis (2020): “Scheduling bus holding times in time horizons considering transfer synchronization and service regularity”, 23rd IEEE International Conference on Intelligent Transportation Systems
  10. OAL Eikenbroek, K Gkiotsalitis (2020): “Robust rescheduling and holding of autonomous buses intertwined with collector transit lines”, 23rd IEEE International Conference on Intelligent Transportation Systems
  11. K. Gkiotsalitis (2020): “Periodic Stop Skipping: NP-hardness and computational limitations”, Transportation Research Board (TRB) 99th Annual Meeting.
  12. K. Gkiotsalitis (2020): “Bus holding of electric vehicles: an exact optimization approach”, Transportation Research Board (TRB) 99th Annual Meeting.
  13. X. Karekla, K. Gkiotsalitis (2020): “Operational characteristics of a bus service and their modification due to a safety-driven acceleration limit”, Transportation Research Board (TRB) 99th Annual Meeting.
  14. K Gkiotsalitis, OAL Eikenbroek, O Cats (2020): “Robust bus scheduling considering transfer synchronizations”, Transportation Research Board (TRB) 99th Annual Meeting.
  15. K Gkiotsalitis, OAL Eikenbroek, O Cats (2020): “An exact method for real-time rescheduling after disturbances in metro lines”, Transportation Research Board (TRB) 99th Annual Meeting.
  16. K Gkiotsalitis (2020): “Bus Operations Optimization: A Literature Review on Bus Holding, Rescheduling and Stop-skipping”, Transportation Research Board (TRB) 99th Annual Meeting.
  17. K. Gkiotsalitis, E.C. van Berkum (2020): “A model for real-time bus holding subject to vehicle capacity limits”, Transportation Research Board (TRB) 99th Annual Meeting.
  18. B.B.W. Schasfoort, K. Gkiotsalitis, O.A.L. Eikenbroek, E.C. van Berkum (2020): “A dynamic model for real-time track assignment at railway yards”, Transportation Research Board (TRB) 99th Annual Meeting.
  19. K. Gkiotsalitis, O. Cats (2019): “Bus holding control of running buses in time windows”, at the 98th Annual Meeting of the Transportation Research Board.
  20. K. Gkiotsalitis, Z. Wu, O. Cats (2019): “Bus allocation to short-turning and interlining lines”, at the 98th Annual Meeting of the Transportation Research Board.
  21. K. Gkiotsalitis (2019): “Robust stop-skipping at the tactical planning stage with Evolutionary Optimization”, at the 98th Annual Meeting of the Transportation Research Board.
  22. K. Gkiotsalitis, F. Alesiani (2018): “Resilient Bus Dispatching Times by Coupling Monte Carlo Evaluations with a Genetic Algorithm”, 21st International IEEE Conference on Intelligence Transport Systems.
  23. F. Alesiani, K. Gkiotsalitis (2018): “Reinforcement Learning-Based Bus Holding for High-Frequency Services”, 21st International IEEE Conference on Intelligence Transport Systems.
  24. K. Gkiotsalitis, O. Cats (2018): “Network-wide synchronized scheduling of public transport services”, hEART 2018: 7th Symposium of the European Association for Research in Transportation. [extended abstract]
  25. K. Gkiotsalitis (2018): “Rolling-horizon optimization of the bus holding problem with sequential hill climbing”, at the 97th Annual Meeting of the Transportation Research Board.
  26. K. Gkiotsalitis, Z. Wu, O. Cats (2017): “Tactical service design and vehicle allocation optimization”, hEART 2017: 6th Symposium of the European Association for Research in Transportation. [extended abstract]
  27. K. Gkiotsalitis, O. Cats (2017): “Exact optimization of Bus Frequency Settings considering Demand and Trip time variations”, at the 96th Annual Meeting of the Transportation Research Board.
  28. K. Gkiotsalitis, N. Maslekar (2017): “Sequential Evolutionary Optimization for improving regularity-based bus services”, at the 96th Annual Meeting of the Transportation Research Board.
  29. K. Gkiotsalitis, N. Maslekar (2015): “Improving Bus Service Reliability with Stochastic Optimization”, 18th International IEEE Conference on Intelligent Transport Systems (ITSC), 2794-2799.
  30. K. Gkiotsalitis, F. Alesiani (2014): “Opportunistic solution-space reduction techniques for reducing the time complexity of Dynamic Speed Control with microsimulation on motorways”, 17th International IEEE Conference on Intelligent Transport Systems (ITSC), 1788-1795.
  31. K. Gkiotsalitis, F. Alesiani, R. Baldessari (2014): “Educated rules for the prediction of human mobility patterns based on sparse social media and mobile phone data”, Transportation Research Board, 93rd Annual Meeting.
  32. K. Gkiotsalitis, A. Alexandrou (2014): “Mobility demand prediction in urban scenarios through multi-source, user-generated data”, 18th Pan-American conference of traffic and transportation engineering (PANAM)
  33. F. Alesiani, K. Gkiotsalitis, R. Baldessari (2014): “A probabilistic activity model for predicting the mobility patterns of homogeneous social groups based on social network data”, Transportation Research Board, 93rd Annual Meeting.
  1. Dr. Amalia Nikolopoulou, SUM – Seamless Shared Urban Mobility, research project SUM is an EU Innovation Action project, 2023-2026.
  2. Dr. Karla Muenzel, SmartHubs – Smart Mobility Hubs as Game Changers in Transport, SmartHubs, research project SmartHubs is an EIT Urban Mobility project funded by the EU and 23 national funding agencies, 2021-2023.
  3. Dr. Oskar A.L. Eikenbroek, Developing quantitative methods for the Planning and Operations of Public Transport services in the COVID-19 era, research project MOCOLODO funded by the Netherlands Organization for Health Research and Development (ZonMw), 2021-2023.
  1. Paraskevi Dimitriou, Optimal Planning and Operations of Freight Transport in Urban Networks for Fleets of Electric Vehicles, National Technical University of Athens, 2023-2027 [main supervisor, ongoing].
  2. Matina Lai-Ying Chau, Network-level, dynamic optimization of multi-modal Transport Systems using BigData, National Technical University of Athens, 2022-2025 [main supervisor, ongoing].
  3. Emmanouil Nisyrios, Optimization and simulation-based assessment of traffic and fleet management strategies for connected and autonomous vehicles, National Technical University of Athens, 2022-2025 [main supervisor, ongoing].
  4. Zakir Farahmand, Cooperative Intelligent Traffic Signal Control, University of Twente, 2023-2027 [co-supervisor, ongoing].
  5. Luiza G.A. Tessarolo, The potential of shared mobility to promote equitable resilient urban transport in Brazil, University of Twente, 2020-2024 [co-supervisor, ongoing].
  6. Matheus Henrique Cunha Barboza, Spatio-temporal inequalities in mobility and accessibility in Brazil – analysis using mobile phone data, University of Twente and EPUSP, 2021-2024 [co-supervisor, ongoing].
  7. Sahand Asgarpour, Strategic Planning of Transport Networks with quantitative methods, University of Twente, 2018-2022 [co-supervisor, ongoing].
  8. Zongxiang Wu, Double demand responsive electric bus operation to passengers and power system, Imperial College London, 06/2019 [company-side supervision, completed].
  1. Zakir Farahmand, Developing resilient public transport services, University of Twente, 2020-2022 [main supervisor].
  2. Sander Veldscholten, Spatial and temporal public transport data visualization: data analysis using a decision support system for alternative public transport services, University of Twente, 09/2018 [main supervisor].
  1. Paraskevi Dimitriou, Optimal planning of charging station locations for freight transport consisting of electric fleet, National Technical University of Athens, 10/2023.
  2. Lianne E. Cortenbach, The Dial-a-Ride Problem with Meeting Points: A problem formulation for Shared Demand Responsive Transit, University of Twente, 03/2023.
  3. Bjorn J. Schutte, An exploratory study to the ERTMS migration of freight rolling stock on a TEN-T corridor, University of Twente, 09/2022.
  4. Yoran R. de Weert, Improving the scheduling of railway maintenance projects by considering passenger hindrance and event requests of passenger operators, University of Twente, 06/2022.
  5. Johan S. Horjus, Integration of shared transport at a public transport stop: the intention to use transport in a multimodal transport network, University of Twente, 12/2021.
  6. Manuel M. Filgueiras, London’s bus network design and frequency setting after the pandemic, University of Twente and University of Porto, 09/2021.
  7. Bodhi Buurman, Railway maintenance reservation scheduling considering train traffic and maintenance demand, University of Twente, 06/2021.
  8. Jesse Voorhorst, Adding multimodal trips with shared mobility to a microscopic demand model, University of Twente, 03/2021.
  9. Thijs ten Siethof, Maintenance optimization for Rolling Contact Fatigue defects with depth cracks, University of Twente, 10/2020.
  10. Zakir Farahmand, The Potential Role of Mobility as a Service (MaaS) as a Transport Demand Management Tool, University of Twente, 09/2020.
  11. Ramon Oppers, Simulated traffic safety in tunnels, University of Twente, 09/2020.
  12. Willem W. Trommelen, An optimization model for rail line crossover locations considering the cost of delay, University of Twente, 06/2020.
  13. Paul Schilte, Comparing the performance characteristics of the Public Bike-Sharing Systems of São Paulo and Rio de Janeiro, University of Twente, 06/2020.
  14. Floris Nijland, Improving railway maintenance schedules by including hindrance and capacity constraints in the design process of schedules, University of Twente, 05/2020.
  15. Victor Brouwer, A data-driver method to automate the detection of traffic control systems that do not perform as intended, University of Twente, 11/2019.
  16. Simone ten Have, Is ultrafast charging the future for EV in the Netherlands? A discrete choice experiment on user preferences for slow, fast and ultra fast charging, University of Twente, 08/2019.
  17. Bram Schasfoort, A decision support system for real-time track assignment at railway yards, University of Twente, 07/2019.
  18. Jan Engels, Forecasting spatio temporal variations in OD-pairs. A case study from Sao Paulo, University of Twente, 03/2019.
  19. Rahul Kumar, Bus operations scheduling subject to resource constraints using evolutionary optimization, Slovak University of Technology, 05/2018 [company-side supervisor].
  20. Alexandros Alexandrou, Mobility demand prediction in urban scenarios through multi-source, user-generated data, National Technical University of Athens, 09/2014 [company-side supervisor].
  21. Alemnew Sheferaw Asrese, Design and implement a dynamic fleet management system by using the Vehicle Routing Problem algorithms, University of Trento, 08/2013 [company-side supervisor].
  1. Nikoletta Gkonou, Combined Optimization of Maintenance Works and Crews in Railway Networks, National Technical University of Athens, 07/2023,
  2. Daniil O. Popov, Spatial analysis of shared bicycle trip data, University of Twente, 07/2022.
  3. Glenn S. Lang, Improving the upper-level solver for simplified MSMC optimization problems, University of Twente, 07/2022.
  4. Chiel van der Ster, Stop-skipping pattern of bus line optimization waiting, travel and in-vehicle times, University of Twente, 09/2021.
  5. Karsten Hilbrands, Verifying the practical use of the schedule-based public transport planning method, University of Twente, 11/2019.
  6. Jeroen Scholten, Improving driving speed prediction for rail transport, University of Twente, 09/2019.
  7. Kelt Garritsen, Variable Static Speed Profiles within ERTMS on the Dutch rail network, University of Twente, 07/2019.
  8. Willem Wagter, Block sections around stations under ETCS, University of Twente, 06/2019.
  1. SUM, European Commission, H2020, Innovation Action, Technical Coordinator and WP Leader, Attracted Funding, National Technical University of Athens, 2023-2026.
  2. Conductor, European Commission – H2020, Innovation Action, WP Leader, Attracted Funding, National Technical University of Athens, 2022-2025.
  3. SmartHubs, European Commission – JPI ERANET, Project Coordination, Attracted Funding University of Twente, 2021-2024.
  4. COG-LO, European Commission – H2020 RIA, Attracted Funding and WP Leader, NEC Laboratories Europe, 2018-2022.
  5. COREALIS, European Commission – H2020 RIA, Attracted Funding and Technical Coordination, NEC Laboratories Europe, 2018-2021.
  6. TEAM, European Commission – FP7 RIA, Task Leader, NEC Laboratories Europe, 2012-2016.
  7. SmartCEM, European Commission – CIP-ICT, Researcher, NEC Laboratories Europe, 2012-2016.
  8. eCoMove, European Commission – FP7, Researcher, NEC Laboratories Europe, 2010-2013.
  9. MOBiNET, European Commission – FP7, Researcher, NEC Laboratories Europe, 2012-2017.
  1. STA.SY. Update of Emergency Management Manual plan of metro line 1 in Athens (HSAP line), 2023-2024.
  2. Developing resilient public transport services, Keolis Nederland – PDEng Programme, Attracted Funding, University of Twente, 2020-2022.
  3. Mobility during and after the corona lock-down: sustainability, safety, inclusivity (MOCOLODO), Netherlands Organization for Health Research and Development (ZonMw), Attracted Funding, University of Twente, 2020-2022.
  4. The COVID-19 Public Transport Capacity Model: a policy-supporting tool for optimizing the corona capacity of public transport, ZonMw, Attracted Funding and Principal Investigator, University of Twente, 2020.
  5. UMO – Urban Mobility Observatory, Netherlands Organisation for Scientific Research (NWO), Principal Investigator, University of Twente, 2019-2023.
  6. Talking Traffic, TINA-4, Provincie Overijssel, Attracted Funding, University of Twente, 2020-2021.
  7. Netmobil – Mobility as a service for rural areas, NWO RAKK-PRO, Researcher, University of Twente, 2017-2021.
  8. Spatial and temporal public transport data visualization, Keolis Netherlands – PDEng Programme, Attracted Funding, University of Twente, 2016-2018.
  9. Cloud City Operations Center, NEC EMEA, Attracted Funding and Principal Investigator, NEC Laboratories Europe, 2014-2015.
  10. Smart Public Transportation, NEC Global and Enterprise Business Units, Attracted Funding and Principal Investigator, NEC Laboratories Europe, 2016-2018.
  1. Moshe Givoni Best Paper Award at Transport Reviews for the article Public transport planning adaption under the COVID-19 pandemic crisis: literature review of research needs and directions, Konstantinos Gkiotsalitis & Oded Cats (2022). https://www.tandfonline.com/journals/ttrv20/collections/best-paper-moshe-givoni-prize
  2. NEC Corporation OpenHouse Award for the development of REFLEX, which optimizes the operations of bus services. REFLEX was awarded as one of the top 30 most promising technologies of the year in the area of social solutions (Tokyo, 2015). 
  3. Best BSc thesis of the year award in the domain of Transport and Mobility – ECOPOLIS (Athens, 2011).

Expertise

Engineering Areas

#Transport Systems Planning
#Public Transport
#Railway Maintenance
#Railway Operations
#Fleet Management

Methodologies

#Operations Research
#Mathematical Programming
#Computer Programming
#Clustering Algorithms
#Multi-objective Optimization
#Real-time Decision Support

Social Sciences

#Mobility as a Service
#Accessibility and Equity in Transport
#Public Transport