The proposed supermarket, to be built behind Andy's Bakery in Meander Valley Road, was expected to appear on last month's Meander Valley Council meeting agenda, but was delayed due to additional traffic studies.

Development proponent and Westbury William Street IGA owner Judy Fellows said she would be at the meeting accompanied by Bullock Consulting architect Chester Bullock, who will answer questions from the council.

Ms Fellows said delays were caused by a Department of Infrastructure, Energy and Resources investigation into a potential slip- lane in Meander Valley Road.

She said the department found no need for the added lane.

"I'm hoping it will be a good outcome, I think we've ticked all the boxes now," Ms Fellows said.

"I hope it will bring more people into the town that might support other businesses as well, it will be a good thing."

Some concern was last month raised regarding the plan's deviation to the council's Westbury Outline Development Plan - which maintains William Street as the town's central business area.

Meander Valley Mayor Craig Perkins last week said although the outline plan focuses on William Street, the council could not prevent developers from submitting applications elsewhere.

Ms Fellows said, if successful, she would endeavour to find a new owner or another business initiative for the empty William Street site.