Наукові горизонти (Dec 2019)
BACKGROUND OF COLLECTIVE MOVEMENT SYNCHRONIZATION MOTOR TRANSPORT FLOWS SERPENTINE SITES (IN HAIRPINS) CAR ROADS
Abstract
Synchronization of the collective movement of vehicles in the composition of flows in special sections of motor vehicles is one of the most pressing problems in the context of increasing intensity of motor traffic. The aim of the study is to increase the levels of safety of transport and technological processes on sections of serpentine (studs) of the road network by synchronizing the collective movement of vehicles in traffic. According to the stated goal the following tasks are defined: to develop a topological form of auxiliary curves of the highway route on the sections of serpentines of the 1st and 2nd kind; determine the topological dimensions of the minimum permissible distance of the contour of the obverse side of the shrubbery gas-dust-protective forest belt to the axis of the carriageway on the serpentine sections. The researches were carried out on the basis of methods of analytical geometry on a plane and taking into account the topological features of algebraic functions, which described the trajectories of the gradients of the movement of flows of "wide moving clusters" of vehicles. It was established a priori that, according to the theory of the three phases of motor traffic, proposed by B. Kerner, the desynchronization of the collective movement of vehicles in the composition of traffic flows at sections with special traffic conditions leads to a violation of the coherence of these flows. The synchronized traffic flow is transformed into a “wide moving vehicle cluster”. Such desynchronization not only breaks the stability of the modes of transport and technological process, but also causes a decrease in the levels of traffic safety and intensification of the emission of aerosols of gas-dust emissions produced by the flows of vehicles. According to the results of researches, topological parameters and a two-dimensional graphical model of a possible variant of transport and technological optimization of the road network in "studs" of serpentines were developed. The design distance of the contour of the obverse side of the wood-bush gas-dust lane to the axis of the carriageway is determined depending on the angle of turn of the highway. Accordingly, the proposed optimization of the design parameters of the road network in the "studs" of serpentines provides for the possibility of synchronization of collective traffic of vehicles in the composition of traffic flows, which provides stabilization of the implementation of transport and technological operations and, as a consequence, increases the overall level of safety of the motor complex. Further research should be aimed at ensuring the safe transport and technological modes of operation of the motor transport complex in the conditions of growth of the share of autonomous robotic unmanned vehicles in the composition of motor transport flows.
Keywords
