Farmers are being warned to clean up after themselves and not leave roads dangerously covered in mud.
The National Farmers Union has issued guidance to its members in the county after a warning by Lincolnshire Road Safety Partnership and Lincolnshire Police that they will take action against farming companies or individuals.
Operators may place warning signs, but still have an obligation to try to prevent bringing mud onto the road.
Andrew Wilson, of the NFU, said: “The NFU recommends that drivers/operators of farm machinery take necessary precautions when entering a public highway and those roads are brushed to prevent causing a hazard for other motorists.
“All road users need to be mindful around the hazard that this presents and should drive according to the conditions.”