The M1 was closed between junctions 4 and 5 for much of the morning following a fatal collision overnight.

A man tragically died when his motorcycle collided with a truck on the southbound section of the motorway shortly after midnight.

The southbound carriageway of the M1 between J5 Balbriggan South and J4 Donabate has since reopened, but delays of up to an hour or more have been reported.

Gardai are advising motorists that traffic travelling on the south-bound section of the motorway will be diverted at Junction 5 to alternate routes into Dublin.

Elsewhere, delays are starting to build up across the city as schools in the capital reopen after the summer break.

There have been several incidents on the M50 this morning, most recently just after junction 14 Carrickmines.

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A little further north, another collision on the slip road from the M50 southbound onto Leopardstown Rd is partially blocking traffic.

The watchdog also reports wet conditions in some areas this morning, mainly in parts of the east coast and in the midlands.

Follow our live blog and stay up to date of traffic developments around Dublin throughout the morning.