In Argyll, road management firm Bear Scotland said traffic from the A83 Rest and Be Thankful had been rerouted as a precaution due to forecast rain.
Bear Scotland’s Euan Scott said: “Heavy rainfall is expected throughout Sunday, which will increase saturation levels on the hillside.
“We have therefore made the decision to utilise the Old Military Road as a proactive safety measure.”
In the north, several rural roads and routes on high ground remained closed.
Poor weather also affected ferry services on the west coast, as well as train services linking Glasgow and Edinburgh with Inverness and Aberdeen.
The Scottish government held a resilience meeting with police, local authorities and other agencies on Sunday.
Justice secretary Angela Constance said conditions were improving but urged people to “remain vigilant”.
She said: “What we will see with heavy rain, wind and improving temperatures is an increase of flooding.
“People must plan ahead for their journeys and keep well informed about conditions in their area.”
