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New software to keep leaves off the line

Fewer delays are predicted for rail users thanks to new software that can tackle the age-old problem of leaves on the line.

Developed by a Metronet engineer, the computer programme uses information such as weather conditions, quantity of leaf litter and moisture levels to warn of problems in advance.

Train companies running the software can find out if the weather conditions on the track are suitable for using Automatic Train Operation, which allows trains to operate their fastest.

ATO has to be suspended, however, during moist conditions when layers of leaves on the line build up and reduce adhesion to below the levels on which signal braking distances operate.

One of the appeals of the software is that it allows train operators to ‘look-ahead’ at weather conditions in two, four or six hours’ time, using real-time updates from the Met Office.

If conditions are expected to deteriorate, the train companies can take action in advance, like cleaning the rails or spraying to clear away the leaves.

Earlier this month, the software won an innovation award for its initial success on the Central line, when it was tipped to be rolled out to the Metropolitan Line.

Last week, the London Paper reported that the software could soon go live across the entire Tube and rail network.

May 21, 2007
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