A truck has overturned on the N4 near Liffey Valley.
Drivers are being urged to avoid the N4 and the M50 as emergency services deal with the situation.
Outbound traffic between Liffey Valley and Lucan is reduced to one lane and there are severe delays in the area.
<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">N4 - All lanes are now currently closed to facilitate recovery of over turned truck. Heavy delays on all approaches to the N4. Local diversions in place. Avoid if possible</p>— An Garda Síochána (@GardaTraffic) <a href="https://twitter.com/GardaTraffic/status/989859232865538050?ref_src=twsrc%5Etfw">April 27, 2018</a></blockquote>
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<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr"><a href="https://twitter.com/hashtag/DUBLIN?src=hash&ref_src=twsrc%5Etfw">#DUBLIN</a> N4 outbound closed again at J2 Liffey Valley for Garda investigation. Avoid. More here: <a href="https://t.co/PSzIBsvOzE">https://t.co/PSzIBsvOzE</a></p>— AA Roadwatch (@aaroadwatch) <a href="https://twitter.com/aaroadwatch/status/989868050617954305?ref_src=twsrc%5Etfw">April 27, 2018</a></blockquote>
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