Delays of up to 90 minutes expected after signalling issue with Irish Rail

Kenneth Fox

A major signalling issue is causing congestion and delays of up to 90 minutes, according to Iarnród Éireann.

At 12:52pm they posted on X saying: "Major signalling issue between Lansdowne and Donabate. Staff are working to rectify this matter."

Their latest update said: "Services are beginning to resume between Donabate and Lansdowne Rd in both directions following a major signalling issue. Delays of up to +90mins Alterations will be made to aid service recovery. Knock-on delays can be expected due to severe congestion.

Iarnród Éireann said the affected services include:

-DART

-Belfast

-Northern Commuter

-Sligo

-Rosslare

-Maynooth

-M3 Parkway/Hazelhatch

UPDATE: Services are beginning to resume between Donabate and Lansdowne Rd in both directions following a major signalling issue.

Please note:
Delays of up to +90mins
Alterations will be made to aid service recovery
Knock-on delays can be expected due to severe congestion. -AD https://t.co/Ih6UckojOM

— Iarnród Éireann (@IrishRail) August 20, 2026

Due to the congestion, other lines will be impacted, but Irish Rail says services are resuming between Donabate and Lansdowne Road in Dublin in both directions.