The northbound section of the A4130, between the junction with the B480 at Lower Assendon and the crossroad near Bix Manor was originally due to be closed for two weeks from Monday this week.
Then a clash with roadworks on a diversion route in Caversham forced a delay until August 19.
Now the work has been put back until October at the earliest because of the traffic problems likely to be caused by overlaps with other events, including the Reading Festival.
David Nimmo Smith, cabinet member for environment on Oxfordshire County Council, has suggested delaying the repairs until the spring when more comprehensive work is planned, including resurfacing both carriageways and improving roadside drainage.
He added: “There is never a good or bad time for roadworks.”
Bix parish councillor Robert Aitken said the road closure would have clashed with the Stonor Craft Show on August 24 and 25 and if it overran could affect the Challenge Henley triathlon on Sunday, September 8, when many local roads will be closed for the day.
He added: “If they can hold off until 2014 it seems like a better use of public funds.”