Cox's Bridge on the Clara road in Tullamore has been closed until the end of February.
The controversial closure of the bridge was averted before Christmas when the NRA and Offaly County Council reached an agreement. The bridge closed on Monday and will reopen on Monday February 28.
All traffic from Clara on the N80 north of Tullamore town is now being diverted left on the western relief road to access Tullamore on the north side and right on the western relief toda to access Tullamore on the South side. all traffic from south of Tullamore town is being diverted ontp the N52 Tullamore bypass.
Remedial works were put back until after Christmas so that trade in the area over the busiest shopping period of the year could proceed unencumbered.