Motorists are being urged to follow official diversion routes while part of the A92 is closed to allow upgrading work to be carried out at Edenbank Bridge.
The official diversions only use A roads but there have been reports that nearby smaller roads are becoming very busy with cars looking to take short cuts.
A spokesperson for BEAR Scotland said: “The official diversion routes that we have planned, signposted and communicated uses A-class roads only so that the diversion is suitable for all vehicles, including HGV’s.
“We are aware that some drivers have been taking shortcuts which are not part of the official routes, such as one through Freuchie but we would not close these shortcut routes because of the impact this would have on local residents.
“We would ask that motorists use the signed diversion routes, drive carefully and plan their journeys carefully in advance, in order to minimise any disruption.”
During the bridge closure, all vehicles heading north are being diverted off the A92 at New Inn roundabout onto the A912, onto the A91 at Strathmiglo and re-joining the A92 at Melville Lodges Roundabout.
Vehicles heading south are being diverted along the same route in reverse.
When the road re-opens, temporary traffic lights will be in place for around six weeks while the southern end of the B937, at its junction with the A92, will be closed for the duration of the works.