Motorists are asked to avoid the N55 near Glasson.
A 60 year old man has been taken to hospital with serious injuries after a crash in Westmeath.
Two cars were involved in the crash near the Jolly Pigeons Pub on the N55 near Glasson earlier this morning.
Gardaí say the road will remain for a number of hours.
Meanwhile, there are delays on the Clara and Tullamore road after a car went into a ditch.