Roadworks requiring a near 100-mile detour will return next week.
And to make things worse for motorists, the overnight closures of the A75 are set to continue during the first week of November.
Amey began work on the A75 at Mossyard and Auchenlarie near Gatehouse at the end of September and paused work for the school holidays.
However, it will resume again on Monday, with the road being closed every night between 8pm and 6am every night until Sunday, November 2.
But Amey has now announced a separate round of resurfacing will take place between Skyreburn and Cardoness from November 4 to 6, again resulting in overnight closures.
And during both rounds of work, the A75 will be closed between Castle Douglas and Newton Stewart, with the official diversion taking drivers on a 96 mile detour through the Glenkens to Ayr, then to Girvan and back to Newton Stewart.
As a result, a 40 minute trip will take nearly two and a half hours.
Amey, which is carrying out the work on behalf of Transport Scotland, defended the need for such a lengthy detour, with a convoy system not an option as parts of the road are too narrow.
A spokeswoman said: “The standard diversion route for maintenance on the A75 during autumn 2024 has been agreed with stakeholders such as the local authority and the emergency services and is required to be suitable for all types of vehicles including HGVs.
“Areas of treatment have depths of 210mm and under convoy would mean traffic would be running in a lane directly adjacent to deeply excavated carriageway. The safety of our workforce, the site,and the travelling public is of utmost importance when planning roadworks and has been used for previous schemes at this location. Drivers are advised to drive with the appropriate care and attention, and to follow and adhere to the signage on the diversion route for their safety and the safety of others.
“By working overnight, and off-peak, every attempt has been made to reduce disruption, but the depth of treatment required and the challenging road widths at this location require the work to be delivered in this way, for the safety of road users and road workers and as a result we have carried out substantial consultation with local stakeholders to develop and communicate this maintenance.