Part of one of the busiest roads in the country, the N2 through Slane, Co Meath, is closed this afternoon for emergency repairs.
Subsidence was discovered on the northern approach road to Slane Bridge and Meath County Council said it has no option but to close the entire section to allow for repairs.
Traffic will instead be diverted through Navan.
Several thousand vehicles pass through Slane every day. It is expected the closure will be in place for the rest of the week and possibly into the weekend.