Car owners throughout Barnsley and the Dearne have been told to shift all vehicles illegally left for sale on council land.
Barnsley Council’s enforcement officers issued 60 notices in recent weeks, ordering that the cars be removed immediately.
Residents’ complaints about cars being left on footpaths, verges and recreational sites led to a month-long campaign to tackle the problem.
A council spokesman said: “Cars often block the line of sight for other road users; some are left on footpaths, preventing safe pedestrian access; some are on recreational ground or overlooked by residential areas.
“There is also the unwanted effect of drivers slowing down to look at the details of these cars, which is a potential hazard for other road users.”
He continued: “In addition, there is no protection for the consumer when purchasing a car from the roadside and people thinking of buying such a vehicle need to seriously consider the risk they are taking.”