Three streets in Nenagh have reopened this afternoon.
Sarsfield Street, Emmet Place and Mitchel Street were closed overnight after a man in his 40s came off his bike on Sarsfield Street at about 3.20 yesterday afternoon.
He suffered serious head injuries and continues to receive care at University Hospital Limerick.
A forensic examination of the scene was completed this morning and the roads have reopened to traffic.
Gardaí are continuing to appeal for witnesses to come forward, including those with dash-cam footage.
