The Pacific Highway near Tea Gardens has re-opened after heavy smoke caused problems earlier today.
However authorities have warned smoke may continue to impact on visibility.
Drivers are asked to exercise caution.
Bush fires are burning near Wooton, Monkerai and Tea Gardens.
Emergency services are at the scene of fires burning at Ferny Creek, Wooton, The Rock at Tea Gardens, Anderson Creek at Monkerai and Shallow Bay, Coomba Park.
Meanwhile an emergency alert at Coomba Park has been downgraded to a "watch and act" warning as the immediate threat to properties has eased.
A wind change is now pushing the fire away from Coomba Park, towards Shallow Bay.
About 80 firefighters, from the Rural Fire Service and Fire and Rescue NSW, worked on the Coomba Park blaze.