Parts of Burley Griffin Way are still closed between the Olympic Highway at Wallendbeen and Millvale Road at Temora.

The rail bridge was demolished last month after damage was caused to it and road approaches at Wallendbeen during heavy rain and flooding in March.

A Transport for NSW spokesperson said planning for a replacement is under way.

"The first task is to finalise both a temporary and permanent solution," they said.

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"We will have further advice for the community on the preferred solution in the coming weeks. We are working to restore a direct connection as soon as possible and thank the community for their patience."

Local diversions currently remain in place, and Transport for NSW is also working with industry to look at alternative crossings for high productivity vehicles and expect to announce further details in the coming weeks.

While the road is closed, motorists are asked to detour via the Olympic Highway and Goldfields Way, which may add an additional 40 minutes travel time to journeys.

Drivers are advised to be aware of to the conditions, plan ahead, and follow the directions of signs and traffic control.

XPT services between Sydney and Melbourne are also impacted. For day time services, customers will travel by coach between Cootamundra and Yass. Night time services will be replaced by coaches for the entire journey.

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