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Signalling

Signalling. Robert Ujszaszi Signalling Project Engineer. Trainstop. Gantry Signals. Points – Diamond Crossing. So what do we do???. Points Commissioning. Air conditioning installation. Air Compressors – Power some points & trainstops. So what do we do???. Track Circuit Testing.

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Signalling

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  1. Signalling Robert Ujszaszi Signalling Project Engineer

  2. Trainstop Gantry Signals Points – Diamond Crossing

  3. So what do we do??? Points Commissioning Air conditioning installation Air Compressors – Power some points & trainstops

  4. So what do we do??? Track Circuit Testing

  5. Train Control • Signals and routes are set by signallers in train control centres • Some routes are automatically set by computer based signalling systems • Older signalling systems utilised mechanical levers physically joined to points and signals

  6. Driver Indications • Signals provide the train driver information on the route ahead • Can indicate whether the train will be travelling straight ahead or through a junction or turnout • Tells the driver when to commence braking

  7. Driver Indications • In busy and complex signalling areas more signals are used to allow trains to travel closer together • More signals give the driver more information about the conditions ahead – allows them to drive their trains more efficiently Application: Closely spaced signalling in high traffic metropolitan areas.

  8. Driver Indications • Yellow indications tell the driver to commence braking • The next signal is usually placed at braking distance plus a safety margin • If yellow signals are not used signals are placed so they can be sighted some distance away

  9. Braking Graphs

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