John Hourdos' expertise is in the area of intelligent transportation systems for traffic control and safety with special emphasis on problems involving traffic modeling and simulation. His current research focuses on Traffic Operations optimization, evaluation of Active Traffic Management systems, and Macro-Meso-Micro hybrid simulation modeling and applications. He is currently the director of the Minnesota Traffic Observatory for which he designed and implemented a unique field laboratory on the highest-crash location of freeway in the state. Recently, Dr Hourdos and his MTO team developed the first Connected Vehicle Testbed in the State of Minnesota. The I-94 CV Testbed was featured in the January 2019 issue of Roads & Bridges.
In collaboration with Dr. Gary Davis, he has utilized measurements from the I-94 field lab and other sources toward an understanding of vehicle crash causal mechanisms and the development of surrogate measures of safety.
Tomhave, B., Zhang, Y., Khani, A., Hourdos, J., and Dirks, P. (2020). Impact of Arterial BRT-Lite Green Dwell Time on General Traffic and Intersection Capacity. Journal of Transportation Engineering Part A: Systems, 146(4), . doi: 10.1061/JTEPBS.0000328
Chen, R., and Hourdos, J. (2018). Evaluation of the roundabout capacity model in HCM6 edition and HCM 2010 on a multilane roundabout. Transportation Research Record, 2672(15), 23-34. doi: 10.1177/0361198118794287
Hourdos, J., Lehrke, D., Duhn, M., Singer-Berk, L., and Lindsey, G. H. (2017). A pre-post analysis of bridge improvements for cyclin in Mankato, Minnesota. ITE Journal (Institute of Transportation Engineers), 87(11), 29-34.
Liu, Z., Dirks, P., and Hourdos, J. (2017). Design, specification, implementation and evaluation of a freeway queue warning system. In 5th IEEE International Conference on Models and Technologies for Intelligent Transportation Systems, MT-ITS 2017 - Proceedings (pp. 762-767).  (5th IEEE International Conference on Models and Technologies for Intelligent Transportation Systems, MT-ITS 2017 - Proceedings). Institute of Electrical and Electronics Engineers Inc. doi: 10.1109/MTITS.2017.8005615
Stephen Zitzow, Derek Lehrke, and John Hourdos. (2015). Developing a Large-Scale Hybrid Simulation Model. Transportation Research Record: Journal of the Transportation Research Board, No. 2491, Transportation Research Board, Washington, D.C., pp. 107–116. doi: 10.3141/2491-12
Gary A. Davis, John Hourdos, Hui Xiong, Indrajit Chatterjee, (2011). Outline for a causal model of traffic conflicts and crashes. Accident Analysis and Prevention 43, 1907–1919. doi: 10.1016/j.aap.2011.05.001