Roads and Martime Services (RMS) back-flipped on its plans to close New Street over AgQuip so it could discuss the impact with residents.
A Transport for NSW spokesperson said the company understood the importance of the annual field days, and would "work with Gunnedah Shire Council to help ensure the event is a success".
"Transport for NSW is aware of community concerns regarding the timing of the proposed closure of New Street as part of the Gunnedah bridge project," the spokesperson said.
"Transport for NSW will continue to engage with Gunnedah Shire Council and other key stakeholders to inform staging of the closure of New Street. The community will be kept informed as the project progresses."
Mayor Jamie Chaffey said he was "waiting for a date" for a meeting with the RMS.
"I have requested that a further meeting be held at their earliest convenience with the council, and requested a number of options be presented with the view of minimising the impact on our community, businesses, and visitors during the installation work," Cr Chaffey said.
The RMS postponed the original closure date of August 12 after Tamworth MP Kevin Anderson contacted them and the regional transport minister's office.
Mr Anderson told them that New Street "needed to stay open during that period" and that a meeting with the council was a good idea.
A new closure date will be chosen after the RMS and the council meet for discussions.
The road is expected to be closed for up to six months and both local road users and heavy vehicles will be diverted to Conadilly Street.