• TRI-NETRA stands for – Terrain imaging for diesel dRivers INfra-red, Enhanced opTical & Radar Assisted system.
  • TRI-NETRA systems on locomotives aims to enhance the vision of Locomotive Pilots in inclement weather
  • TRI-NETRA system is made up of
    1. high-resolution optical video camera,
    2. high sensitivity infra-red video camera and
    3. additionally a radar-based terrain mapping system
  • These three components of the system act as three eyes (Tri-Netra) of the Locomotive Pilot
  • Why needed? During fog, heavy rain and also during night, the locomotive pilots face serious challenges in looking out ahead to spot any obstruction on the track such as vehicles which get stuck while crossing the track or trees or boulders which have fallen across the track etc.
  • Why in news? Indian railway will soon introduce Tri-Netra system on its trains to reduce train accidents.
  • How it works?
    • The Tri-Netra system uses infrared and radar technology to collect signals up to a distance of 2-3 km and displays the information on a screen fitted inside the locomotive.
    • In case of any physical obstruction on railway tracks ahead it will alert the drivers and thus give ample time for the driver to apply the brakes to prevent train accidents.
    • It will be very useful during fog, heavy rain and nights, when drivers have to constantly look outside the locomotive to judge the condition.
  • Key Facts
    • Tri-Netra will help reduce train accidents by keeping a record of the track maintenance and will also provide better visibility during foggy days.
    • The system provides a locomotive pilot a clear view of up to one kilometre on a straight track, even during inclement weather.
    • This will also help in maintaining high speed in poor visibility and avoid delay in arrivals.
    • The new technology has been used on a trial basis and has shown good results.


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