A man has been pronounced dead after a two-car crash on the A38 following a heavy hail storm.
The crash, which was one of five in the area, closed the A38 in Plymouth for 10 hours.
At 5.48am yesterday emergency services were called to the Exeter-bound carriageway of the A38 between Manadon roundabout and Marsh Mills.
The two vehicles involved in the fatal collision were a red Ford Fiesta and a black Toyota Avensis.
At the time of the collision the road surface was icy, following a recent hail storm.
As a result of the crash the driver of the Ford Fiesta, a local man aged 42, died from his injuries.
Police say his next of kin have been informed.
A total of ten vehicles were involved in five separate crashes during yesterday's morning rush-hour, some cars leaving the main road and coming to rest on the grass verges.
The driver of the Fiesta was taken to Derriford Hospital and at the time was said to be in a critical condition.
At 9.21pm yesterday police announced the man had died.
The road was expected to be closed until 1pm while investigations took place but didn't reopen until 4.25pm.
The road was been closed at the Devonport and St Budeaux on slips.
The Exeter bound carriageway was open from the Tamar Bridge but traffic was directed off at St Budeaux through Pemros Road.
This morning Chief Inspector Ian Drummond said: "There have also been several minor accidents across the city so I advise people to take extra care when travelling in this weather.
"Please leave extra time to travel."
Officers at the scene believe that the freezing road conditions may be a contributory factor and warned motorists to slow down when using any of the roads in the area.
Further collisions on the approach to the scene also added to the congestion with tailbacks clearing at around 11am.
Police say there was also disruption at Novorossisk Road where an HGV broke down.
Pc Ryan Canning tweeted: "I wouldn't even attempt to travel through Plymouth this morning. Its gridlocked all around the A38 & roads are treacherous."
Sudden sleet and hail showers are making driving difficult and dangerous - suddenly reducing visibility and leaving a thick slick on the carriageway.
Plymouth Citybus also reported problems this morning and took to Twitter to inform travellers: "Traffic is now at a standstill from Mudge Way to Marsh Mills. Please bear with us there is nothing we can do at the moment."
Another tweet read: "Crownhill area is at a standstill with long Delays to any service using that area."
An investigation of the scene took place and the Plymouth Serious Collision Investigation Unit are appealing for witnesses to this incident to contact them on Tel 101 quoting log number DCP – 20130122-0100.