Because snow can reduce the effectiveness of brakes in a number of ways, train drivers are required to make regular Running Brake Tests when there is falling snow, or if their train disturbs snow already lying on the ground......
From Section TW of the Rulebook
Quote:
Working trains during snow conditions
The person responsible: driver
18.1 When these instructions apply
You must carry out the following instructions when snow is
falling, or fallen snow is being disturbed by the passage of trains.
18.2 Running brake tests during snow conditions
You must make a full service application of the automatic brake
every three to five minutes and make sure that the speed of your
train is reduced by at least 10 mph as a result of the application.
If driving a locomotive-hauled train, you can extend this interval
when:
• the train is climbing a steep-rising gradient, and
• the train might be brought to a complete stand as a result of
using the brake.
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(The red colour is mine)
As Les is saying that the QTron confirms the driver took the correct action, there will be a very detailed examination of the rolling stock taking place.
FP