Night time crews will set to work on a major repairs scheme at Friarton Bridge next week.
The £75,000 maintenance and resurfacing operation will be carried out at the M90 crossing and the Craigend interchange (junction 10).
Roads bosses said the work will take place over 10 nights from Monday, to avoid disruption to commuters.
The job involves resurfacing the slip road from Friarton towards Broxden, with new bridge joints also being installed.
Routine maintenance work will also take place on the bridge. Deck joints, carriageway channels, verges and drains will be cleared as part of the operation.
Bear Scotland said there will be four nights of alternative lane closures on the bridge, with a further six nights of slip lane closures at Craigend.
All work will be carried out between 7.30pm and 6.30am, with signed diversions in place.
Andy Thompson, Bear Scotland’s north-east representative, said: “These maintenance works are part of our commitment to ensuring that the North East network continues to be of the highest standard and to carry out works with minimum inconvenience to motorists.”
He added: “We’ve planned the works to take place overnight to limit the impact to road users as much as possible, and every effort will be made to minimise the duration of the closures each night so as to minimise disruption to motorists.
“We thank motorists in advance of the project for their patience during these works, and encourage them to plan their journey in advance by checking the Traffic Scotland website for travel information before setting out.”
The works have been planned in consultation with Police Scotland, Perth and Kinross Council and Traffic Scotland.
Meanwhile, night-time roadworks which restrict access to the northern section of the M90 have been extended.
The stretch between junction eight (Arlary) and junction nine (Muirmont) near Glenfarg is being resurfaced.
The work was due to finish earlier this week, but was continued until Friday morning.
Traffic flow on the outskirts of Perth recently ground to a halt, thanks to a “perfect storm” of roadworks, closures and traffic lights.
The council said congestion problems around the A85, including at one stage a five-mile tailback, was “primarily” due to Scottish Water work.
