Railway maintenance is defined as the process of preserving a working condition of a railway equipment, along the track or related to rolling stocks, but there are actually different approach to mantain a railway asset or service..
With CBTC, moving blocks introduce to the concept of contiguous track, because the railway is represented as a single contiguous block, rather than a set of adjacent blocks. This means that the safe separation behind the preceding train is dynamically calculated based on the maximum operating speeds, braking curves and locations of the trains on the alignment. Also, in this way the capacity of the railway is extremely increased.
Strict safety requirements regulate the development of railway signalling and train control systems, covered by the CENELEC (European Committee for Electro-technical Standardization) EN 5012x rail standards
This paper will drive you across the different phases of the V-cycle for railway application, by explaining the key role of requirements during each phase and presenting the Systems Engineering activities required to support and control product development.
Track circuits contributes for train detection but also for the vehicle’s speed control, since the electrical signals used for train detection can be exchanged between wayside and on-board for the transmission of speed commands.
Since the train can be considered the transport mode of the future, national railway companies and European Union are currently working for a continuos upgrade of sustainable rail transportation, in order to guarantee the best quality of life to European citizens.
Railway signalling can be defined as all systems used to control railway traffic safely, essentially to prevent trains from colliding. Over the years knoledgment and technology able to satisfy this issue have been implemented. ERTMS/ETCS is currently the most common signalling system adopted in Europe.
Requirements Management is concerned with understanding Customer goals, identifying and specifying the needs of Users and Stakeholders and the transformation of these needs into functions and constraints enabling development of products and services.
Since the SafeRail project set out in 2013 to assess the feasibility of using satellite technology to improve safety at level crossings, the debate over the dangers posed by locations where rail meets the road has only grown. Many countries are working to phase them out, but the cost of replacing them with new infrastructure is often too high to consider except in the most serious cases.
Since the train control systems are critical systems, they must be certified according to strict guidelines, such as CENELEC regulations. These rules govern both the development process and the characteristics of the final product.
In railway signalling, an interlocking (IXL) is a system composed by a set of signal apparatus that prevents trains from conflicting movements through only allowing trains to receive authority to proceed, when routes have been set, lock and detected in safe combinations.
Communications-Based Train Control (CBTC) is a railway signaling system mostly used for metros and light railways. It makes use of the telecommunications between the train and track equipment for the traffic management and infrastructure control. London is going to host a series of highlight CBTC events in March 2015.
A research programme to achieve a more competitive and resource-efficient European transport system with a view to addressing major societal issues such as rising traffic demand,
congestion, security of energy supply and climate change.