Drivers are to be subjected to another closure of the Friarton Bridge in the latest phase of a £450,000 upgrade.
The second stage of the works by Transport Scotland will begin on Sunday and last for four weeks.
The southbound carriageway of the bridge will be shut for 11 hours from Sunday evening until Monday morning.
The closure is to allow for the safe erection of the traffic management system and traffic will be diverted from 7.30pm until 6.30am.
For the next four weeks the southbound carriageway will be reduced to a single lane with a 30mph speed limit. Journey time signage will be placed at key locations on the network to inform the travelling public.
The works will involve the replacement of the safety barrier in the central reservation.
The existing barrier was part of the original bridge construction, which was opened in 1978. The barrier has reached the end of its working life and will now be replaced, with the existing barrier materials being recycled.
Andy Thompson, operating company representative for BEAR Scotland Ltd, said: “The M90 trunk road is an important strategic link connecting the central belt to the north east of Scotland.
“These essential works will ensure that this section of the M90 will continue to operate safely and effectively for all road users.
“We would like to thank the travelling public for their patience during the first phase of the works. Some delays are expected during the second phase of the works and we would advise motorists to plan their journeys ahead and, again, we thank motorists in advance for their patience while these essential bridge works are being undertaken.”
The first phase of the essential works was completed last Sunday, one week earlier than originally planned.
The works are being carried out by BEAR Scotland and have been planned with Perth and Kinross Council and Tayside Police to ensure they can be carried out safely and efficiently. Road users can go trafficscotland.org for additional information.