Motorists travelling between Tewantin and Noosaville on September 23 and 24 should go via Beckmans Road and Eumundi-Noosa Road to avoid delays.
That's the message from Council as contractors prepare to close one lane of Tewantin's Doonella Bridge, Memorial Avenue, from 9am to 3pm.
The lane closure will enable contractors to examine the bridge and scope out the work needed to fix it.
"We had hoped to limit the lane closure to one day, but to accommodate all of the equipment required on site, we'll need to stagger the work across the two days," Infrastructure Services Director Carl Billingham said.
"Although traffic control will be in place, drivers will encounter delays, so motorists' best bet to get where they're going as quickly as possible is to take the alternative route along Beckmans Road and Eumundi Noosa Road," he said.
Mr Billingham said the work was scheduled for the school holidays to lessen the traffic disruption.
"The approaches to the bridge have moved slightly and we need to determine the work needed to fix them. Closing one lane will allow us to safely examine the structure and investigate the cause of the movement," he said.
"Unfortunately, due to the nature of the work it can't be done at night."
Electronic signs are in place to remind drivers to use the alternative route.
