Abstract
The paper concerns basic information about implementation of the ETCS system in the Czech Republic especially its influence on the railway operation. Also facts about the principles of the automatic train protection system with the full speed supervision are described as well as the specifics of the speed monitoring experiences. In the next chapter are some principles of the braking curves calculation.
Highlights
The European Train Control System (ETCS) L2 implementation projects currently carried out by the Railway Infrastructure Administration of Czech Republic – i.e. in an environment with basically no previous experience with operating an automatic train protection system with full speed supervision – bring either new aspects, or aspects not very well known
Being an ATP system with full speed supervision, it is the responsibility of ETCS as a technical device to ensure that the vehicle doesn't exceed the limit parameters, i.e. the maximum allowed speed in the given position and the maximum position to which a movement of the vehicle is allowed. (Note: This represents the main safety objective of the implementation of ETCS, with other ETCS features being implemented either to achieve this safety objective or to ensure interoperability)
If a real ATP system with full speed supervision is to take on the responsibility, it has to algorithmize more critical braking curves than those which a vehicle is able to achieve in normal operation in most situations, i.e. in nominal situations
Summary
The ETCS L2 implementation projects currently carried out by the Railway Infrastructure Administration (further SŽDC) of Czech Republic – i.e. in an environment with basically no previous experience with operating an automatic train protection (further ATP) system with full speed supervision – bring either new aspects, or aspects not very well known. Being an ATP system with full speed supervision, it is the responsibility of ETCS as a technical device to ensure that the vehicle doesn't exceed the limit parameters, i.e. the maximum allowed speed in the given position and the maximum position to which a movement of the vehicle is allowed. Depending on the method of implementation of the ATP system with full speed supervision, the abovementioned transfer of responsibility can lead to operating restrictions compared to the situation before the implementation. This article presents certain aspects of the introduction of deceleration supervision or stopping supervision as key safety-operational aspects of the ETCS implementation, adding or emphasizing relevant facts to broaden the context of the operational impacts of ETCS and their solutions
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