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.
The infrastructure of the PTC system typically includes five segments; a back office housing servers and databases to receive information related to tracks, train locations, speed limits and work zones, the wayside segment comprising interlocking and right-of-way infrastructure, the onboard segment displaying rolling stock information, the roadway worker protection system, and lastly, the communications segment involving ground-based, land mobile data radio and wireless networks.
Bombardier Rail Jobcasting makes a lot of sense because where a job description communicates the opportunity, video and audio can help establish the sense of "fit" that is so important for a job seeker.
The main European cities are seeking quick costructions for light metro system, easy urban insertion and improved life-cycle costs. Among the most important rail suppliers, Alstom has launched the Axonis light metro system to meet these specific transport needs in fast-growing and densely-populated cities.
ETCS Level definitions are related to the trackside equipment used, to the way trackside information reaches the on-board units and to which functions are processed in the trackside and in the on-board equipment respectively.