Delivering capacity and service resilience from modern CBTC systems


Author: Phil Dubery
Day: Aspect Day One
Session: CBTC and Metro

To achieve optimum service capacity and resilience on a modern
railway requires a thorough understanding of the environmental
characteristics of the railway, the operational constraints and an
ability to balance the safety and the performance of the railway in
terms of service regulation, management and release of train
movement authorities, train spacing and relative movements and
operational speeds, particularly across key junctions and the
interaction between the automatic train control systems and the
train traction and braking systems.The presentation addresses
these issues in a systematic manner with a vision of the railway of
the future and how modern technology and processing power
could be integrated to achieve the optimum railway performance.
Specific areas to be addressed using service examples will
include:-Balancing the operational and technical aspects of the
railway, such as platform detrainment, dwell and crew
changeover times and the service patterns to ensure that
potential pinch points on the railway are alleviated by considering
operational and technical aspects holistically to achieve practical
operational performance.-Management of open section adhesion
levels, how these can be monitored and strategies to optimise
braking curves and performance through flexing the braking
profiles and brake application levels to match the geographical
and environmental characteristics of the railway and using service
performance data to support the operational and technical cases-
Management of the vehicle train interface and passenger comfort
using modern modelling techniques supported by service
condition monitoring of key aspects to ensure that speed profiles
achieve the best railway performance whilst balancing passenger
comfort and track safety and condition issues.-Optimising railway
performance by ensuring that fleet utilisation is maximised by
considering all the factors that contribute to the fleet service
requirement, including stand time in termini and sidings, interstation
run times and platform stopping and dwell times, lost time
through service operation and continuous monitoring of the
railway to provide timely indications of either congestion or time
being lost on the railway during operation-Harnessing data from
the myriad of centralised and distributed computer systems to
fully characterise the actual performance of the railway and allow
amendments to be made to the operational practices, service
schedule timings and regulation, control, signalling and rolling
stock systems data to continually improve the performance of the
railway and empower the operators with both a high level
overview of the railway performance and an understanding of
how the railway performance can be made more resilient by both
preventing, minimising and recovering from service
perturbationsUltimately the presentation aims to bring together a
vision of how the railway operation, scheduling and performance
can be developed in an integrated manner with continuous
process control being applied in the same way as for modern
manufacturing processes whilst considering the human and
system contributions and taking a proactive approach to
understanding these with a continuous and immediate feedback
loop to hone and improve the operation, scheduling, performance
and systems design of the railway.