The Tom Clarke Bridge in Dublin – also more generally known as the East Link – is blocked in both directions this morning.
Motorists are being urged to avoid the entire Dublin Port area. There are already knock-on effects across the east of the city.
Hauliers protesting against skyrocketing fuel prices are staging a major demonstration in the capital.
They have been travelling along routes into the city since early this morning and have blocked the bridge and other routes in the port area, Dublin City Council said.
Also, a pedestrian march beginning at the GPO on O’Connell Street is also expected to take place later this morning.