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.
railwaysignalling.eu is a technical e-journal and web community.
It was born and grows with the purpose to share high-tech knowledge about the most advanced and widespread signalling and train control European solutions.
Young and experienced rail-signal engineers are welcome to participate to the group’s web community, by publishing their own technical articles about the main topics of railway signalling and train control European solution.
The on-train system calculates an energy efficient speed profile to achieve the pre-planned or dynamically updated train timings, and generates detailed driver advice to follow the profile and achieve the timings. The control centre is responsible for conflict detection and calculation of new target train timings.
To validate the requirements, test plans are written that contain multiple test cases; each test case is based on one system state and tests some functions that is based on a related set of requirements.
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.
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.