The paper presents the results of creation and investigation of dependencies of notification sections and notification times from train speed at different methods of automatic level crossing safety installation control. The authors consider automatic level crossing safety installation systems with notification sections of fixed length and with the control based on approaching train characteristics. As a result, method of automatic level crossing safety installation control based on train characteristics simultaneously increases safety and decreases time of crossing closure for road transport.
The paper presents an analysis of the system of automatic level crossing. The proposed system belongs to a group of linear devices that ensure safe movement of motor vehicles at intersections of railway and car roads. In the paper, the computational tasks were carried out. On the basis of statistical data, the THR rate, which is characteristic for rail transport, was estimated. An example of modeling railway automation systems based on Markov processes is also presented.
The paper shows investigations of relationship between the length of approach sections of level crossing safety installation and braking distances of trains. It is established that the existing methods of calculating approach sections of automatic level crossing safety installation don’t guarantee, if necessary, a full stop of a train by braking before a crossing after it’s closure. The authors have formulated a condition when a train can be stopped before a closed crossing occupied by a motor vehicle. They have also carried out a verification of the existing automatic level crossing safety installation systems and established that such systems don’t comply the formulated condition, so the full stop of a train is not guaranteed. So, the authors have proposed measures on developing an algorithm of automatic level crossing safety installation operation for the control of automatic stop of a train before a crossing occupied by a motor vehicle. It is shown that the development of engineering is on a level sufficient for realization of this suggestions.
Automatic level control system for telephone communication channels of radio-transmitting devices