People in Fife are being urged not to drive south tomorrow morning with delays expected on the Forth Road Bridge.
Restrictions will be in place from 03:00 to 11:30 as workers prepare for a special inspection of a possible weakness in the main cable on the crossing.
Steelwork will be erected near the top of the south tower so that an access platform can be winched into position.
Bosses expect significant queues are expected to build up after 09:00.
Pedestrians and cyclists will be able to cross the bridge using the west footpath/cycleway.
Bridge authority FETA ordered the special inspection after an increase in wire breaks within the main cable was detected at this location.
The breaks were detected using an acoustic monitoring system, which uses microphones along the length of the cable to detect breaks amongst the 11,618 high tensile steel wires that make up each main cable.
If weather or other circumstances cause these works to be delayed then they will be rescheduled for the following weekend.
Barry Colford, Chief Engineer & Bridgemaster, said: “These restrictions are necessary for safety while steel beams are erected on the main cable high above the carriageway.
“These beams will allow us to winch an access platform into position so that we can open up the cable for inspection. The purpose of this inspection is to determine whether the recent increase in wire breaks that we have detected is indicative of a longer term problem.
“It’s worth repeating that, while these breaks do merit further investigation, there are no immediate safety concerns and the cables still have more than enough strength to do their job.
“Once we know the results of the inspection we will recommend any further action that is required to ensure the bridge remains safe and open to traffic”