Motorists are being urged “raise your game on the roads” as patchy fog spreads across the county.
This is particularly bad in the A1 Stamford area.
A spokesman of Lincolnshire Police said: “Drivers raise your game! Pay extra attention, take extra time and increase your concentration.
“Take great care and drive according to the conditions. Put your headlights on where necessary to make sure you can be seen.
“It’s December now so these conditions will become more frequent. A little extra care will keep you and other road users safe.”