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Problem. The purpose of vehicle speed studies is to identify general trends in speed and its rational limits, to assess the level of traffic safety, to forecast harmful emissions into the air and to provide an integrated assessment of travel time in urban networks that takes into account the random nature of this variable. Its assessment is particularly relevant in urban environments where traffic conditions cannot be considered free. Transport situations here often limit space and maneuver time, as well as reducing opportunities for drivers. Different drivers' reactions to the difficulties in traffic can lead to an increase in the level of speed randomness, which requires very careful attention to the parameters of its distribution. Previous studies in this direction have confirmed such trends but have not let definitive conclusions about the nature of speed distribution in urban streets. Goal. Testing the hypothesis that the gamma distribution is suitable to describe the speed oscillations of the same type of vehicles in different conditions. Methodology. Statistical evaluation of vehicle speed actual values in the stop-line front of the urban signalized intersection by means of the distribution theoretical law and regression analysis of the relationship between the mathematical expectation and the form parameter of the gamma distribution of speed. Results. The hypothesis that the gamma distribution can be used to describe oscillations in the speed of similar vehicles under different conditions has been confirmed. Originality. The speed of cars and motorcycles under new driving conditions was assessed. Practical value. The obtained result allows increasing accuracy of the car and motorcycles speed prediction in analytical and simulation models of transport networks functioning.
Cascetta, E., (2001), Transportation Systems Engineering: Theory and Methods, Springer US, Boston, 710 p.
Govoruschenko, N.Ya., (2011), System engineering of automobile transport (calculated methods of researching), Monografi-ya, KhNADU, Kharkiv, 292 p.
Makarichev, A.V., (2019), “Distribution of automobile speed in the stop-line front of the urban signalized intersection”, Vestnik Harkovskogo natsionalnogo avtomobilno-dorozhnogo universiteta, KhNADU, Kharkiv, No. 85, pp. 107-116.
Makarichev, A.V., Horbachov, P.F., Min, V.D. and Horbachova, V.A., (2019), “The influence of carriageway width on the automobile speed in city conditions”, Avtomobilnyiy transport, KhNADU, Kharkiv, No. 43, pp. 93-102.
Berry, D.S. and Belmont, D.M. (1951), “Distribution of vehicle speeds and travel times”, Proc. Second Berkeley Symp. on Math. Statist. and Prob., Univ. of Calif. Press, California, pp. 589-602, available at:
Maurya, A.K., Dey, S. and Das, S. (2015), “Speed and Time Headway Distribution under Mixed Traffic Condition”, Indian Institute of Technology Guwahati, India, 19 p.
Minh, C.C., Sano, K. and Matsumoto, S. (2005), “The speed, flow and headway analyses of motorcycle traffic”, Journal of the Eastern Asia Society for Transportation Studies, Vol. 6, pp. 1496-1508.
Nguyen, Cao Y, Minh, C.C., Sano, K. and Matsumoto, S. (2009), “Motorcycle Equivalent Units at Road Segments under Mixed Traffic Flow in Urban Road”, Proceedings of the Eastern Asia Society for Transportation Studies, Vol. 7, 14 p.
(2010), Traffic rules, Resolution of Cabinet of Ministers of Ukraine.
Gnedenko, B.V., Belyaev, Yu.K. and Solovev, A.D. (1965), Mathematical methods in reliability engineering, Science, Mos-cow, 524 p.
Rao, A.M. and Rao, K.R., (2015), “Free Speed Modeling for Urban Arterials – A Case Study on Delhi”, Periodica Polytechni-ca Transportation Engineering, No. 43(3), pp. 111-119.
Dhamaniya, A. and Chandra, S. (2013), “Speed Characteristics of Mixed Traffic Flow on Urban Arterials”, International Jour-nal of Civil, Environmental, Structural, Construction and Architectural Engineering, Vol. 7, No. 11, pp. 883-888.
(2012), Free speed survey 2011 (Urban and Rural), Research Department, Road Safety Authority, Ireland, 50 p.