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.
In railway signalling, capacity can be defined as the maximum number of trains that can pass a given location during a given time period at a specified level of reliability.
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.
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.
In railway signalling, capacity can be defined as the maximum number of trains that can pass a given location during a given time period at a specified level of reliability.
After awarding a 1billion euro contract, Thales will deliver an Automatic Train Control (ATC) system for four of London Underground’s lines: District, Circle, Metropolitan and Hammersmith & City.
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.
Alstom UrbalisTM solution: the CBTC, state-of-the-art wireless local area network (WLAN) for train control, SmartlockTM 400 interlocking, trackside equipment, and Automatic Train Supervision.
Next week MetroRail 2014 will be hosted in London. During the event rail industry professionals from around the world expected to be part of discussion about latest projects, developments and challenges in metro signalling and train control.
The railway signalling market is going to live a very excting year, due to strong technology improvements and expansion of the European systems worldwide.
SmartRail World spoke to a number of CBTC experts at the recent CBTC World Congress in London about their work including: Rory O’Neill, Acting Director (Docklands Light Railway), Ramil Shafie, Manager of Railway Maintenance (Rapid KL)