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What are these extra rails?

  • 30-03-2015 10:42am
    #1
    daymobrew
    Registered Users, Registered Users 2 Posts: 6,571 ✭✭✭


    On the Maynooth line near 12th Lock in Castleknock there is a tiny stretch of track with 2 rails inside the main rails. What are these for?

    Location: https://goo.gl/maps/swtxi - just west of the bridge over M50.

    Photos attached.


Comments

  • #2
    flyingsnail
    Registered Users, Registered Users 2 Posts: 2,777 ✭✭✭flyingsnail


    They are rails to help contain any derailment, you normally see them on bridges or where the rail line is close to a sheer drop


  • #3
    Seanmk1
    Registered Users, Registered Users 2 Posts: 119 ✭✭Seanmk1


    flyingsnail wrote: »
    They are rails to help contain any derailment, you normally see them on bridges or where the rail line is close to a sheer drop

    At this point, the line crosses the M50 on a curve. The check rails help prevent what would be a very nasty derailment


  • #4
    GM228
    Registered Users, Registered Users 2 Posts: 8,922 ✭✭✭GM228


    Seanmk1 wrote: »
    At this point, the line crosses the M50 on a curve. The check rails help prevent what would be a very nasty derailment

    The idea being if a train derailed the inner rails would hopefully catch the wheels stoping anything from falling over the bridge.

    GM228


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