Commuters have been warned to prepare for disruption expected to be caused by heavy snow overnight.
The advice comes following Met Office amber weather warnings for eastern Scotland urging the public to "be prepared". Alerts have been issued for the Borders, north-east Fife, Perth & Kinross, Angus, Aberdeenshire and Moray.
Heavy snow is expected, with up to 20cm on higher ground. Strong winds are also forecast with potential for drifting snow. A number of existing yellow "be aware" warnings also remain in place across the rest of the country.
Transport Minister Keith Brown said: "As the wintry weather continues, Transport Scotland stands ready to respond swiftly and appropriately. Our Multi Agency Response Team (MART) will monitor the difficult conditions and the Scottish Government's resilience team is also closely monitoring the situation to help deliver a co-ordinated response.
"Motorists and public transport users should factor the weather and high likelihood of disruption into their travel plans, staying abreast of live travel information by listening to local radio reports and checking online sources.
"While we have implemented a raft of improvements ranging from higher than ever salt stocks to a strengthened fleet of gritters, the public must play their part by making full used of the vast sources of communications available. Drivers should take the road conditions into consideration, leaving extra time for journeys if necessary.
"The Traffic Scotland Control Centre continues to monitor the travel situation very closely and the website, Variable Message Signs and internet radio will be used to provide up to date information as the situation develops. I would urge the public to stay vigilant and tuned to local radio reports and the Traffic Scotland website as circumstances could quickly change."
Assistant Chief Constable Allan Moffat, speaking on behalf of the Association of Chief Police Officers in Scotland, said: "Weather warnings are in place for many parts of the country, particularly in the east. If you are travelling, be prepared for the winter weather.
"Check conditions and travel advice before setting off and ensure that both you and your vehicle are adequately prepared for the journey. Allow yourself plenty of time and make sure that you have sufficient fuel and supplies such as warm clothing, food and water in case you are delayed.
"When you are out on the road, remain vigilant and continue listening to weather and travel reports. The police service in Scotland continues to work in close association with the Met Office, Government agencies and trunk road operators to ensure that clear and concise safety messages are made available as soon as possible."