Part of a major route between Laurencekirk and Marykirk will close for six weeks to allow “essential” bridge works to be carried out.
From Monday, July 11, the A937 will be closed to all traffic at South Balmakelly for the £150,000 project.
An Aberdeenshire Council spokesperson said: “The concrete bridge, which dates back to the 1930s, is no longer able to safely carry today’s traffic on this important primary route.
“Local access to properties will be maintained at all times as the closure is in the immediate vicinity of the bridge only, but nearby roads will also be affected.
“Two central reserve gaps on the A90 trunk road between Laurencekirk and the B974 junction at Crosspoles will be temporarily closed off during the works.
“This is intended to prevent an increase in HGV and other traffic turning north onto the A90 at these minor ‘at grade’ crossings during the road closure, in the interest of road safety.
“Diversions are via the A92 coast road and the A935 via Brechin.
“Advance warning signs will be placed at all the major junctions where drivers have to make decisions about their routes.”
Information about road closures and restrictions is available on Aberdeenshire Council’s website.