Snow update: Main roads clear, but more showers forecast for Hull and East Yorkshire throughout Tuesday
Snow showers are expected throughout Tuesday after a blizzard caused traffic chaos across East Yorkshire on Monday evening.
Major roads were brought to a standstill during rush hour as the region was hit by snow and ice.
A car overturned on the B1230, east of High Hunsley, and other accidents created huge jams.
The Met Office said the bad weather was set to continue today.
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A spokesman said: "The weather will be largely cloudy at first with snow showers, some heavy.
"The snow showers will become light and isolated through the day, as sunny intervals develop."
Main routes throughout East Yorkshire were clear this morning, according to bus firm EYMS, but ice was causing treacherous conditions on many minor roads, with hills in the north of the county particularly hazardous.
No major transport problems have been reported, but Hull Trains cancelled its 7.22am London to Hull service, as well as the 10.30am Hull to London train, due to signalling problems.
Clifton Primary in west Hull, Driffield Junior School and Kings Mill School, Driffield, are all closed today. Bridlington School will open at 10am to allow staff extra time to get in.
Drivers reported gridlock on the major routes in and around Hull yesterday.
He took the decision to ensure all 900 pupils could make it home.
Mr Jones said: "Passenger services needed time to organise the early pick-up and, on balance, I believed this was the most sensible course of action, given our duty of care for students and staff."
A group of 23 students preparing for A-level exams were able to stay behind and finish them.
In Hull, the cold weather shut down Greenwood Avenue Library because of heating problems and Woodford Leisure Centre, in Holderness Road, east Hull, was forced to close because of a broken boiler.
An accident at about 4pm left one lane into the city closed on Spring Bank and Park Street, causing serious delays.
The fire service is prepared if things get worse.
A Humberside Fire and Rescue spokesman said: "We do have resilience plans to ensure that we are able to continue providing our services.
"The advice we'd give is to always drive to the conditions, allow extra time and avoid making unnecessary journeys."
East Riding Council has been stockpiling salt in readiness.
It sent out 17 gritters last night to keep highways open.
John Skidmore, head of the council's streetscene services, said: "The council is continuing to monitor weather conditions, as it did around the clock over the weekend, and has sent its gritting fleet out again to treat the precautionary network.
"The council has been preparing for winter since last summer and has full salt stocks at its barns and orders in place to replenish this, as required.
"The council will continue to act in accordance with its winter maintenance plan and would urge residents to take care during this period of inclement weather."
He said drivers should stay on major roads as much as possible.
Mr Skidmore said: "We would advise motorists to drive to the conditions, allow extra time for their journeys and travel on the main treated network."