Warning over icy conditions across Humber region
People across East Yorkshire and northern Lincolnshire are being warned to take care while travelling because of icy road conditions.
A Met Office yellow warning of ice for the region remains in force.
Forecasters said there may be a few more snow flurries in places and warned of icy stretches on untreated roads.
Councils said work to keep the main roads clear would continue but said conditions would remain difficult in rural areas.
John Skidmore, head of Streetscene Services at East Riding of Yorkshire Council, said: "Sub-zero temperatures mean that ice is still a real problem, especially in untreated areas; so residents are urged to travel with extreme care due to the continued risk of ice.
"The council is continuing its round-the-clock operations, in accordance with its winter maintenance plan, but would urge residents to take care when out and about."
Humberside Airport said weather conditions were continuing to affect flights, and urged passengers to check with airlines before leaving.