© STVNew danger: police have warned drivers to take care on the roads.
Scotland woke up to yet more snow on Tuesday morning, as severe weather warnings were issued for widespread black ice and temperatures as low as minus eight.
By midday on Tuesday most towns and cities were experiencing sub-zero temperatures with Inverness reaching a record low for November overnight - at minus 14.
Plunging temperatures meant untreated roads froze up, leaving many commuters struggling to get to work and schools facing closure for a second day running.
The Met Office has issued severe weather warnings of widespread icy roads to Grampian, Strathclyde, Central, Tayside & Fife, South West Scotland and the Lothian and Borders regions.
ScotRail services between Motherwell and Cumbernauld and between Edinburgh Waverley and Dunbar were suspended due to adverse weather conditions.
Edinburgh Airport was closed again this morning around 7am due to snow on the runways.
Forecasters are predicting the country could see minus 20C (minus 4F) in some areas later this week as heavy snow continues.
The severe weather is expected to last at least until the weekend.
On Monday, motorists on the A9 battled with heavy snow all day. As conditions worsened on Monday evening Tayside Police closed the A9 to traffic along a 26-mile stretch between Broxden roundabout, at Perth, and Keir roundabout in Dunblane.
Drifting snow continued to cause hazardous conditions on the country's road network and police repeated their call to set out only if "absolutely necessary".
In Tayside the M90 Perth-Edinburgh route reopened after the recovery of stuck vehicles and the A9 was passable with care.
Dundee Airport was closed all day on Monday, while Edinburgh Airport was shut for nearly 12 hours as staff battled to clear the runway.
Worsening conditions forced the airport to close again at 6.15pm. Flights were also cancelled at Inverness and Stornoway.
Trains travelling in and out of Glasgow were severely affected, with cancellations on the Ayr, Gourock, Larkhall, Motherwell, Ardrossan and Cumbernauld lines.
There were also disruptions to trains between Glasgow and Edinburgh and on the Stirling to Dunblane line.
STV weatherman Sean Batty said temperatures were likely to drop even more over the next few days, with some parts of the Highlands possibly falling to minus 20C (minus 4F) by Thursday night.
Towns and cities in the central belt will see temperatures of minus 10C (14F), with more heavy snow expected in the central and eastern regions.
"We already have copious amounts of snow lying in some areas and it is only going to get worse in the next 24 hours with more snow and blizzard-like conditions," he said.
"With strong winds at times deep drifts will also occur."
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