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Level Crossing: Baldoyle Rd vs Merrion Gates

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    #32
    A Dub in Glasgo
    Registered Users Posts: 17,028 ✭✭✭✭A Dub in Glasgo


    If you read the links posted earlier, you will see that the type of level crossing system is very much dependent on the road / rail usage and conditions. There is no one size fits all irrespective of how many times you say there is.


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    #33
    Marcusm
    Registered Users Posts: 10,222 ✭✭✭✭Marcusm


    Trevor451 wrote: »
    Any news on the proposed overpass at Merrion gates?
    http://www.boards.ie/vbulletin/showthread.php?p=76941443

    I can't see this ever happening. Hard to see the space even for a car only overpass; certainly the train won't be raised or dropped at this site.


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    #34
    subway
    Closed Accounts Posts: 6,131 ✭✭✭subway


    Stop ruining my thread.... :pac:
    Baldoyle level crossing was down for around 2 mins today so think there have been some changes


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    #35
    tricky D
    Closed Accounts Posts: 9,700 ✭✭✭tricky D


    Same here at lunchtime at Sutton Station. Almost exactly 2 minutes which is an improvement.


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    #36
    kc56
    Registered Users Posts: 431 ✭✭kc56


    sporty56 wrote: »

    They don’t seem to realise that DART trains are capable of stopping pretty quickly taking not much more distance than a LUAS at similar speed. I know that DARTs can also be stopped by the Fat Controller if needs be. Yet there seems no difficulty allowing LUAS to approach very busy traffic junctions and stop at red lights if required without men with red flags while DART is deemed to require 1000s of metres and several minutes to stop by RSC.

    DART and LUAS are, as stated in the IR Letter, very different. DART has standard train brakes and while they might be effective they are no match for LUAS brakes. LUAS, like all on-street trams, have not only electric and disc brakes acting on the wheels, they also have an electromagnetic brake. This is the meter long metal part between the wheels that is a few mm above the rails. The electromagnet brake provides additional braking similar to other street vehicles like buses and trucks. DART brakes are only steel on steel and have limited adhesion.

    Also, DARTs are much faster and require longer stopping distances. The railway also has to take account of other traffic like DMUs, 22Ks and the odd loco traffic so stopping distances are usually set to the fastest, poorest braking trains. (KIlkenny route has a lot of freight trains which are both slow, max 50mph, and have long stopping distances. Barrier down times will be longer in these cases).

    In some places, as stated in the letter, quicker barrier down times are used but that requires compliance from the road users. Given the Irish custom of breaking red lights, bikes totally ignoring them and the inevitable barrier hoppers, I've no doubt IE have taken the safe way of total barriers and long down times to avoid accidents. You can't it both ways - short times and zero accidents, not in Ireland anyway.


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