Roads will be closed and traffic snarls are expected form in the Illawarra on Sunday as thousands of cyclists take part in the MS Sydney to the Gong charity bike ride.
Illawarra motorists are advised to plan ahead and expect delays resulting from the event, which begins 90kms away in Sydney Park, St Peters, or - for shorter-course riders - from an Engadine location 53 kilometres away.
A Transport Management Centre spokesman said the ride was expected to conclude by 4pm.
"Motorists and cyclists will be sharing the roadway for much of the event on Sunday, so keep an eye out for each other and follow the directions of emergency services personnel on the ground," he said.
"There will be large groups of cyclists on roads between Stanwell Park and Wollongong, so motorists will have to take extra care in these areas."
Stuart Park at North Wollongong is undergoing a transformation in preparation for the event, with dozens of tents set up to mark the end point for riders.
Road closures, Sunday, November 3
* 6am to 3pm - Waterfall, Royal National Park and Otford
The McKell Ave between Kooraban St and Lady Wakehurst Dr
Sir Betram Stevens Dr between Garie Rd and The McKell Ave
Lady Wakehurst Dr between The McKell Ave and Lawrence Hargrave Dr
Lawrence Hargrave Dr (local traffic only)between Stonehaven Rd and Chellow Dene Ave southbound
* 6am-5.30pm - North Wollongong
Stafford St from Station St
Station St between Stafford St and 30m west of Princes Hwy
Police may restrict vehicle access along closed roads, including residents and businesses if required.
A 60km/h speed restriction will be in place on the Princes Highway from 6am until midday between Sutherland and Waterfall.
A 40km/h speed restriction will be in place on Lawrence Hargrave Drive from 6am until 4pm between Stanwell Tops and Thirroul.
Special event clearways will be in place between St Peters and Fairy Meadow between 4am and 3pm. Please check signs before parking, as vehicles parked in special event clearways will be towed and charged a towing fee.