Up to 8,000 people are expected to attend Pie Fest at Bong Bong Picnic Racecourse from 10am to 4pm on June 29 and 30.
Traffic is expected to be heavy along Kangaloon Rd and Horderns Rd as crowds travel to and from the event.
The speed limit on Kangaloon Road will be reduced from 80km/h approaching the racecourse from 9am to 5pm each day.
No-stopping zones will be in effect on both sides of Kangaloon and Horderns Road around the racecourse main entry gate for the duration of the event.
Traffic controllers will be on-site managing vehicle entry and exit at the site.
Motorists are advised to allow extra travel time through the area over the weekend.
Visit www.livetraffic.com for updates.