Traffic wardens have been physically and verbally attacked after dishing out one parking ticket every six minutes.
They issued 4,222 fines in 29 days after Lincolnshire County Council took over responsibility from the police for enforcing on-street parking.
Police have been called in after wardens were attacked by motorists who returned to find a ticket on their vehicle.
Silver Street in Lincoln has generated most fines since a new civil parking enforcement scheme was rolled out county-wide on December 3.
Fines are £50 or £70, but halved if paid in 14 days.
So far, 1,887 motorists have paid up, generating £62,105. That will rise to at least £108,605 once outstanding tickets are settled. The council had estimated losing £174,000 in an "unpredictable" first year of the new scheme.
But if every month generates as much revenue as December, the scheme could make a profit of at least £189,000 in a year.
Brian Thompson, the council's head of highways, denied the clampdown was about making money.
He said: "Although it is unlikely the scheme will break even, legislation around parking enforcement means any surpluses can only be spent on transport-related projects.
"We have always said our financial assumptions are based on year two of the scheme as the first year is likely to be unpredictable and our projections are based on experiences elsewhere in the country."
He said most people had welcomed the crackdown as they were fed up with poorly-parked vehicles.