ERTMS in RailLab
Rail Concept masters the specifics of ERTMS signalling. We have assisted SNCF Réseau in defining the deployment strategy for ERTMS level 2 signalling on the conventional network and have conducted numerous operational studies on ERTMS projects. With this experience, Rail Concept has developed this signalling in RailLab for timetable modelling and simulations. All levels are integrated: level 1 - 2 - HTD with virtual blocks and train integrity detection. The ERTMS features in RailLab have been developed according to the specifications of the ERA (European Union Agency for Railways) and are identical in every respect. The calculation results are therefore compliant with European standards.
Modelling
The modelling of ERTMS signalling is carried out across different levels:
- Infrastructure
- Rolling stock
- System parameters
Infrastructure
In ETCS levels 1 and 2, signalling is represented with markers and track circuits. In ETCS level HTD signalling, additionally includes the option of train integrity detection, allowing the use of virtual blocks within physical blocks.
Rolling stock
The characteristics of rolling stock include ERTMS parameters. That allow the running calculation and braking curves calculation used in conflict calculations (service braking or emergency braking). These parameters are to be defined according to the type of train (Gamma or Lambda).
ERTMS projects with RailLab
Assets
ERTMS signalling is integrated very precisely in RailLab. This precision in modelling allows:
- Modelling all ERTMS levels and signaling transitions from track side to ERTMS
- Calculating stopping distances and minimum spacing between each train
- Calculating signalling conflicts
- Building reliable timetables
- Simulating disruptions in timetable
ERTMS Simulation
Conflicts calculation
RailLab allows for the calculation of signaling conflicts between trains in ERTMS at all levels. This functionality enables the construction of robust timetables without conflicts. The conflict calculation is based on precise infrastructure modeling and detailed parameters of rolling stock braking curves and general ERTMS calculation parameters.
Dynamic simulation
RailLab allows for dynamic simulation of a timetable, taking into account ERTMS braking distances relative to markers. This functionality, used in robustness tests and stochastic tests, enables second-by-second reproduction of an operational scenario in a disrupted situation by injecting delays and applying operational actions to reduce disruptions.
Animation
System settings
Various parameters come into play to calibrate the calculation of train movement and braking distances. These parameters allow for defining the additional times and distances used in conflict calculations.
RailLab animate second by second the movements of a timetable, including ERTMS signalling. It is thus possible to visualise train movements and analyse the interaction based on ERTMS braking curves.
