Gardai say The Frenchpark to Carrick on Shannon road, the R370 at Lurgan, Frenchpark has re-opened to traffic this afternoon.
It was closed after a man was seriously injured in a crash this morning.
The single vehicle incident happened at Lurgan in Frenchpark at around 6am.
The man in his 40s was brought to Sligo University Hospital with serious injuries, while no other injuries were reported.
Gardaà want to hear from anyone who was in the area of the R370 in Lurgan between 10 to 6 and 10 past 6 this morning, and who may have seen the incident.