The cold weather has contributed to a string of incidents on the region's roads today, say police.
At 5:45am officers were called to the A30 eastbound at Sourton Cross where a 3.5 tonne van had slid into the crash barrier.
The incident closed the road and traffic was diverted through Okehampton.
This caused slow traffic on the A30 westbound at Meldon.
The driver did not suffer any injuries, police reported.
Another two vehicles left the road in Tavistock in two separate crashes.
One car overturned near the Whitchurch turn off at 7:05am, along with another car which crashed in the same location.
Police say the two cars were a Citroen Xara and a Vauxhall Astra.
The fire service made one of the vehicles safe and a recovery truck removed the wreckage of the overturned car.
Police asked motorists to avoid Prince Charles road area in Exeter this morning.
A car and a police car collided just off the roundabout at 8:40am.
A police spokeswoman said: "It appears the driver of a Silver Mitsubishi Carisma suffered a medical episode and crashed over pedestrian crossing and crashed head-on into a police car."
The male driver of the Carimsa was temporarily unconscious and an ambulance was called.
The two police officers in the white Ford Focus police car were uninjured and directed traffic.
James Dashwood, of the the Beacon Bus-Coach Company in North-Devon took to Facebook to warn motorists of ice on the A377, just past Bishops Tawton.
He posted a warning on thisisdevon's Facebook page which read: "I hit a big sheet of black ice this morning on the A377, heading towards Umberleigh.
"It's on the bend just before the low bridge. There is a flow of water crossing the road, looks like the splash off has frozen over night and will stay that way until the sun hits it. Please take care if passing there and in general on the dark side on the roads."
A small bridge near Kingsbridge is completely blocked this morning after a tractor and car collided.
The black Renault Megane and the tractor crashed on Bowcombe Bridge at 9:08am.
The Devon Air Ambulance was called to a crash at Crediton today.
A silver Toyota Yaris came to rest on its roof at Creedy Bridge near the Shoebrook turning.
The driver of the Yaris was walking wounded and the Air Ambulance was stood down.
Ice was reported in the area at the time.
On the A361 near Barnstaple a two-car crash left fluid leaking onto the road.
A BMW and a Peugeot collided just outside Barnstaple heading towards South Molton at 9:07am.
Occupants of both cars were out when police arrived.
Fire crews were stood down when the leaking fluid was found to be coming from the radiator and was not fuel.
Hazardous driving conditions have also been reported on the A361 in Ilfracombe at Mullacott Cross roundabout.
Today's freezing temperatures and slippery roads have promoted a warning from the police who are asking drivers to take extra care.
"Ice and very low, very bright winter sunshine all adding to the mix - take care," tweeted Topsham police officer Sarah Giles this morning.
Police have asked drivers to leave extra time for their journeys and keep their speed down.