Bubwith Bridge will now be closed until 7pm on Friday 2 December after a extension to urgent safety work.
The bridge had been due to reopen on Thursday (1 December) but further work by East Riding of Yorkshire Council means it will now reopen a day later.
It will reopen with a three-tonne weight restriction and a 2.2m width restriction to further protect the structure.
Arriva Yorkshire said: “Our @SelbyCollege 1 service will divert via Wressle and Breighton between North Duffield and Bubwith until further notice. (Due to weight restriction) This will cause significant delays to this service.”
The bridge suffered damage in a road accident.
Recent poor weather weakened parts of the bridge further, and there was the potential for large and heavy vehicles to cause further damage.
So the council is carrying out temporary repairs including installing concrete barriers, installing a sandbag headwall, and bringing in the traffic restrictions.
The work is intended to secure the bridge for the winter months, although it will be regularly monitored.
A temporary signed diversion is in place, taking traffic via Holme on Spalding Moor, the A164 to Howden, A63 to Barlby, then back on the A613, and vice versa during the full closure.
The car park and picnic area will also be closed 7pm on 2 December.