Drivers have been urged to be extra cautious on routes in some parts of Scotland due to the wintry conditions.
Heavy snowfalls and ice caused disruption on Friday evening, with central and south western areas the worst affected.
Police Scotland warned of "hazardous" conditions across Strathclyde and Dumfries and Galloway.
Snow was causing delays on some parts of the M8 and M74, with other smaller road closures.
A Met Office yellow be aware warning of snow and ice was in place for almost all parts of Scotland until 12:00 on Saturday.
A police spokesman said: "If you are travelling on the roads you should ensure you and your vehicle are adequately prepared for the conditions, making sure you have sufficient fuel and supplies such as warm clothing, food and water in the event you are delayed for several hours.
"Charge your mobile phone and plan your route as well as alternative routes."
Road operator Amey tweeted: "A challenging night to be sure."
It said there had been "bottlenecks" on the M8 and A702 but no closures.
On Friday evening, Glasgow Airport warned of delays and the Rangers v Hearts match at Ibrox was abandoned due to the snowy weather.
Transerv Scotland, which deals with highways in south west Scotland, said it had 26 gritters working around the clock to keep 22 major routes open.
Numerous minor accidents led to big delays on some of the main routes on Friday evening 
Lucy Mathieson sent us this picture of the old police box in the snow in Glasgow's Buchanan Street 
Difficult conditions brought out the team spirit in Glasgow The A76 near Cumnock and New Cumnock was closed for a time because of snowy conditions as was the A751 at Stranraer.
Long queues developed on the M80 after three buses became stuck on the A806 towards Kirkintilloch.
The Erskine Bridge was closed southbound because of the conditions but traffic was later allowed to cross.
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Warning of 'hazardous' conditions
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