The heavy snow has caused problems for motorists across Scotland Snow is continuing to fall in parts of Scotland causing problems for commuters and hundreds of schools to be shut.
Temperatures are expected to stay around freezing and forecasters predicted up to 15cm (6in) of snow could fall.
Police advised drivers not to travel unless absolutely necessary.
White-out conditions have affected several main roads, including the A9 which is closed between Perth and Dunblane.
The A9, one of the busiest roads in Scotland, remains open north of Perth.
Edinburgh airport is closed and there is major disruption on the rail, with the Glasgow-Edinburgh service reduced to twice an hour.
There are long tailbacks on various roads due to motorists getting stuck and jack-knifed lorries.
The A90 is closed southbound between Forfar and Dundee. Traffic is being diverted via the A92.
And the M90 is closed south of Perth and at Friarton Bridge.
There is major congestion on the A80/M80 with traffic getting stuck in the snow.
HGVs in particular are having trouble, which is causing severe delays.
The M876 is also affected up to junction 1 due to the congestion.
In West Lothian, the M8 is closed westbound at junction 3 Livingston.
There are HGVs stuck in the snow, and the M8 is down to one lane in places between West Lothian and Glasgow.
The M8 is down to one lane in places on approach to Glasgow city centre.
There is also very slow traffic on the M77 heading towards Glasgow. The road is queuing from junction 5 Maidenhill.
The Edinburgh City Bypass is covered in thick snow and traffic is crawling.
WEATHER AND TRAVEL INFO
Check if snow is forecast in your area at BBC Weather Details of motorway and local road closures and public transport disruption are available at BBC Travel News For advice on handling difficult driving conditions, see the Highways Agency website For information about severe weather warnings, see the Met Office website For information about staying healthy in the cold weather, see the NHS Winter Health website
In the Borders, the A1 is closed in both directions at Berwick Upon Tweed and the A68 is closed at Soutra.
There is major disruption on most train services.
Trains from Glasgow Queen Street to Edinburgh at 15 and 45 minutes past each hour will not run.
Going the other way, trains from Edinburgh to Glasgow Queen Street at 00 and 30 minutes past each hour will not run.
Trains between Perth and Aberdeen are also disrupted.
Trains on other routes are subject to delays or cancellation.
Edinburgh Airport is closed and Aberdeen is expecting disruption.
The Met office issued a severe weather warning for areas across Scotland with snowfalls of five to 15cm forecast.
A number of school areas were taking a St Andrew’s Day holiday but many other were forced to close.
As at 0700 GMT, all schools had been closed in West Lothian, East Lothian, Shetland Islands, Scottish Borders, Midlothian and Fife.
The total number of closed school in the Aberdeenshire area stood at 110.
Parents are advised to listen out for updates on their local radio stations and to look at their local council websites.
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