sentences:  The road to Clonaslee continues as the R422 road.The R421 diverts back into County Offaly through Killurin and meets the N52 Tullamore Bypass at a roundabout junction.It leaves the N52 at Charleville Castle grounds and continues in through Tullamore as the Charleville Road, Cormac Street, High Street, Bridge Street, Columcille Street & Arden Road (all formerly part of the main N52 road).