One southbound lane of Woodward Street between Prince and March streets will be closed between 9am and 3pm on Friday so a contracting crew can replace a temporary surface with hot-mix asphalt.

The work will follow the efforts of Orange City Council crews last Friday to make temporary repairs after water from a broken main damaged the road.

MAP: Where the roadworks will take place ...

Motorists should expect delays and are encouraged to use alternative routes.

The weekend's Newcrest Orange Challenge cycling event will require road closures in the CBD and areas west and south of the city to ensure the safety of competitors.

A time trial event around Robertson Park on Saturday afternoon will mean no access for cars to McNamara Street and Lords Place from 1pm on Saturday and through Sunday, while Byng Street between Peisley and Summer streets will be closed between 4pm and 7pm on Saturday.

MAP: The area to avoid on Saturday afternoon and evening ...

Sunday's race will force early-morning closures of McNamara, Moulder and Kenna streets, as well as Coronation Drive and Cargo Road.

There will also be changed traffic conditions - including speed reductions and traffic controllers - at Forest Reefs, Orchard and the Southern Feeder roads, and Anson and Moulder streets between 11am and 4pm on Sunday.

The Great Volcanic Mountain Challenge will also be held on Sunday, and council advised motorists heading towards Mount Canobolas for the race to go via Pinnacle Road, with Cargo Road to be closed closed for the cyclists.