One of two questions set at the York Study Group May session. Any comments would be gratefully received and used at the June session.
A railway is introducing a new cab signalling system. Under normal operation there is no requirement for lineside infrastructure for the purposes of signalling the train or advising the driver of any restrictions or limits (any relevant information will be available in the cab). The railway has very demanding operating requirements and the provision of signalling equipment for degraded operation is being considered.
Give three examples of events that could lead to degraded operation. [3 marks]
What factors may influence the provision of equipment to support degraded operation ? [5 marks]
How could the equipment for degraded operation be designed and controlled? [5 marks]
How can technical and operational performance and safety risks associated with infrequent use of the degraded mode equipment be managed? [7 marks]
How can the cost effectiveness of the degraded mode provision be assessed? [5 marks]
A railway is introducing a new cab signalling system. Under normal operation there is no requirement for lineside infrastructure for the purposes of signalling the train or advising the driver of any restrictions or limits (any relevant information will be available in the cab). The railway has very demanding operating requirements and the provision of signalling equipment for degraded operation is being considered.
Give three examples of events that could lead to degraded operation. [3 marks]
What factors may influence the provision of equipment to support degraded operation ? [5 marks]
How could the equipment for degraded operation be designed and controlled? [5 marks]
How can technical and operational performance and safety risks associated with infrequent use of the degraded mode equipment be managed? [7 marks]
How can the cost effectiveness of the degraded mode provision be assessed? [5 marks]