Question 9.
On occasions, usually due to failure or intrusive maintenance, it is necessary to operate the railway in the absence of functions normally provided by signalling and telecommunications systems.
Describe three such methods of degraded working, indicating the circumstances in which it would be used, how an acceptable level of safety is maintained and state the residual risks when compared to normal working. [25 marks]
1 attempt
On occasions, usually due to failure or intrusive maintenance, it is necessary to operate the railway in the absence of functions normally provided by signalling and telecommunications systems.
Describe three such methods of degraded working, indicating the circumstances in which it would be used, how an acceptable level of safety is maintained and state the residual risks when compared to normal working. [25 marks]
1 attempt
PJW