| Abstract [eng] |
Analyzed modernized railway sector, which is being prepared for installation of ETCS third level systems package. In this case, the train traffic is no longer carried by fixed interlocking sections, but mobile. ETCS first level – it is an automatic train protection and control system with fixed mobile sections which have installed locomotive alarm. ETCS second level – at this level trains continue running via the fixed interlocking sections, only there arises the GSM-R connection. In this way, there is the opportunity to move the train route in accordance to the driver's cab monitor display of virtual signals. ETCS third level is the last of the ERTMS system development. Train integrity control is installed at maximum level of confidence, so, at this level, the road occupation control signals, traffic signals and track circuits are rejected. Train traffic is organized into mobilized interlocking sections, which are formed by calculating safe distance up to the front of the train. Trains moving on mobile sections occupy a certain place at side track. The distance between the trains running in one direction consist of safe road train braking distance and 50 meters of reserves constant. This distance must be hold in accordance to speed of the front train (or the distance to it) in order to avoid the accident situations. These parameters are derived from estimate dynamic characteristics. In order to build capacity assessment method, it is proposed to improve train traffic graphs mapping: scratches graphs include the stopping distance curve, thetrain back marking, display train run-up and braking. Train braking distance and brake preparation path calculations have to be made in advance and have to be used for the scheduling creation. The graphic-mathematical graph generation method is suitable for the estimation of parameters, the section of bandwidth detection and traffic impact on car traffic at level of crossings analysis. This idea has been tested and is suitable for evaluation of experimentally recorded train information. There is made precise mathematical graph, which is drawn by each train stop, run-up accelerations. Designing these charts, there is a possibility to determine the speed of train, list road section and location. |
