Motorists in Sydney have been advised to keep an eye out for road closures and disruptions around the CBD with the 2017 Running Festival on this weekend.
It's expected that around 33,000 people will run in the event, which includes four races - a half marathon, full marathon, family fun run and 10km bridge run on Sunday.
NSW Police will be taking part in Operation Nagle, a high-visibility policing strategy, to make sure everything runs smoothly.
Major road closures will take place on the Sydney Harbour Bridge, including the Cahill Express Way, Bridge Street, College Street, Hickson Road, Macquarie Street, Oxford Street, Sussex Street, Phillip Street, Flinders Street, Pyrmont Street and Moore Park Road.
The closures will start around 4am and special event clearways will be in place between 1am and 1.30pm in the Sydney CBD, North Sydney, Pyrmont, Darlinghurst and Moore Park.