More than £500,000 is to be spent resurfacing two main roads in Perthshire.
Bear Scotland has already begun a week-long project on the A9.
A 1.1 mile stretch from Cairnie Braes to Broom of Dalreach will be repaired and road markings repainted in works costing £348,000.
During the repairs, which will take place between 7pm and 6.30am, a convoy system with a 10mph speed limit will be in operation to help keep workers safe.
Work on the A85, which is costing £180,000, will see the road closed between 7pm and 7am from May 31 until June 5.
Traffic controls will not be used outwith this time.
Motorists will be diverted via the A822, A9/M9, A84 and A85 via Dunblane, Callander and Lochearnhead.
A local diversion route will also be in place, although this is not suitable for HGVs.
On the A9 works, Andy Thompson, Bear Scotland’s north-east unit representative, said: “These works will repair a number of cracks, potholes and fretting issues, which will improve the general condition of the road for motorists.”
In relation to the A85 repairs, Eddie Ross, Bear Scotland north-west unit representative, said: “These works will lead to a much improved road surface when they are complete, enhancing the quality of the transport links in the area as well as improving the safety of the travelling public.
“Some disruption will be experienced as a result of these works. However, the safety of our workforce as well as the travelling public is paramount.
“All possible efforts to reduce the disruption as much as possible will be taken.”