No injuries have been reported, but lanes 2 and 3 are affected.
Emergency services are at the scene of a crash on the M50 southbound.
It happened just before Junction 7 Lucan.
No injuries have been reported, but lanes 2 and 3 are affected.
Drivers can expect long delays.

Fuel Protests Force Major Road Closures Across Leinster
Fuel Blockades Continue
Friday's Kfm Obituary Announcements
New Cultural Programme Set For Castletown House
Celbridge Woman Who Lost Sister To CF Calls For People To Support Today's Fundraiser
Protestors, Including Kildare's John Dallon, Refused Entry From Government And Agriculture Bodies Meeting
Defence Forces Travelling To The Curragh Today For Training
Newbridge Silverware’s Silver-plated Cutlery Factory Officially Closes