All three southbound lanes of the F3 are blocked near the Gosford exit after a horse float overturned today.
The southbound on-ramp is also blocked and traffic is reported to be banked up to Kariong.
Emergency services are responding.
Southbound traffic is being diverted onto the Pacific Highway at the Kariong exit.
Traffic is already very heavy in the area, so motorists are experiencing significant delays.
Motorists are advised to delay their journey.
For the latest traffic information, visit www.livetraffic.com or call 132 701.