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31 December 2018 in Transportation Research Procedia
The article considers the issue of improving the quality of public transport services by implementing the concept of creating an automated traffic management system as an element of an intelligent transport system and using reserves to increase intersection capacity. This concept of improving the quality of transport services is short-term in implementation and requires less financial resources, which is an advantage. The objective of the work is to evaluate traffic parameters for various types of traffic signal regulation. Mathematical models describing the change in delay time and speed of the vehicle in the traffic flow are presented. Results of traffic modelling for various types and parameters of traffic signal sets are provided. The social and economic (average delay time, fuel consumption) and environmental effects obtained from improving organization of traffic by optimizing the work of traffic signal sets are presented. The obtained results confirm the hypothesis on the influence of characteristics of traffic flows and transport system parameters on traffic parameters. Multifactor dependences of average delay time and traffic speed from traffic intensity, distance between regulated intersections and the value of the time shift are constructed.
The article deals with the influence of the infrastructure for public transport on the delay time of private and public transport in the city. The study employed the methods of simulation, mathematical modeling and field research. Imitation microscopic modeling determined the parameters of mathematical models of the delay time of private and public transport for various parameters of the bus lane, the length of the bus stop loading area, and its distance from the signalized intersection. Calculations determined the total delay time, taking into account the number of passengers in public and private transport on the section of the main street of regulated traffic. Determining the optimum parameters of the public transport infrastructure requires considering not only public transport passengers, but also drivers and passengers of private vehicles. Over-improving parameters of the bus lane has no effect on public transport, but traffic parameters for all other road users degrade. At high traffic intensity, the dependences of the total delay time on the length of the marking lines 1.11 and 1.5 are described by the parabola equation. The values for a road with three lanes have been determined, marking lines 1.11 and 1.5 at which the total delay time is minimal. For a highway with a high intensity, minimum bus stop parameters lead to significant increases in delay time.
7 November 2018 in Journal of Mechanical Engineering Research and Developments
The work proposes a methodological approach to studying and assessing the environmental sustainability of the transport system of the city. The authors have selected parameters for assessing the environmental sustainability of the transport system and identified significant factors affecting environmental sustainability. A coefficient of environmental sustainability of the urban transport system and a formula for its calculation are proposed. A simulation was used to assess the amount of emissions of harmful substances from the car exhaust gases if the demand structure changes with respect to the means of transport and transportation methods. The paper presents the results of changing the parameters of the traffic flow and demand by means of transport and transportation methods when introducing a parking fee in the central part of the city, changing the cost of parking and expanding the paid parking area.