Commuters in Leeds endured miserable journeys to work this morning as wintry weather caused traffic problems across the city and the rest of West Yorkshire.
Roads in Rawdon and Calverley were reportedly gridlocked during the rush-hour following overnight snow.
Motorists also faced “very hazardous” driving conditions on the A6120 ring road in Horsforth.
Lengthy tailbacks built up on the A61 Scott Hall Road southbound through Chapel Allerton.
Two lanes were closed on the A1(M) southbound between Boston Spa and Bramham because of a multi-vehicle accident, with the resulting queues stretching as far as Wetherby.
Transport firm First warned passengers to expect delays of about 20 minutes on most of its services in Leeds.
The number 4A was terminating at Pudsey Waterloo while the 62 was not running on Woodhall Road.
Yorkshire Tiger buses in Kirklees were using main roads only.
On the trains, a reduced timetable was in operation between Leeds and Manchester.
Around 150 schools in West Yorkshire were closed.
Northern Powergrid said it had drafted in extra engineers to repair any damage to electricity lines.
Additional staff were also on duty at its contact centre to help customers suffering power cuts.
Residents in Yorkshire can reach the centre by calling 0800 375675.
Bin crews in Leeds said they were facing “significant problems” accessing parts of the north and west of the city due to snow, ice and traffic congestion.
The city council said it would aim to get collections back on track within 48 hours, subject to the weather conditions.
Intermittent wintry showers, some of them heavy, were continuing in Leeds this afternoon.
Gritters are due out on the city’s roads at 7pm today and 4.30am tomorrow.
The Met Office has a severe weather warning in place for the whole of Yorkshire and Humberside until 11am tomorrow.
Another warning has been issued for the region between 12.15am and 11.45pm on Sunday.
Meanwhile, Dr Angie Bone, head of extreme events team at Public Health England, said: “In this sort of weather we know that older people and people in poor health tend to stay indoors.
“While this is sensible, it’s worth remembering these people may need help getting to a hospital or GP appointment, with shopping or prescription fetching, or just someone to talk to. If you know someone in this situation, and most of us do, think about what you can you do to help out.
“Contrary to popular belief, it’s actually working age adults who have most slips and trips outside in cold and icy weather, not older people, which is why it’s important to wear shoes with a good, slip-resistant grip to prevent any accidental falls.”