Dozens of collisions in black ice on Cumbrian roads
Icy conditions on Cumbrian roads led to 60 collisions including one involving a minibus carrying schoolchildren, police said.
Cumbria Police warned drivers to take care following the string of crashes during the morning.
A school minibus went into a ditch between Dalston and Curthwaite shortly before 0830 GMT. No one was hurt and pupils were transferred to another bus.
Police said there was rain overnight followed by an early morning freeze.
A Cumbria Police spokesman said: "There have been no fatalities this morning, but after 60 collisions in only a few hours, we are worried that further serious accidents may occur.
"The roads may only look wet, but many are covered in black ice."
They urged drivers to slow down, allow plenty of stopping distance and take care when approaching bends, hills and junctions.