Police yesterday used hi-tech cameras to spot motorists who were committing a range of offences.
The Automatic Number Plate Recognition system, (ANPR), can instantly read registration numbers of moving cars and then checks those details against the police and other national databases.
Police teamed up with other organisations such as HM Courts, Leicestershire County Council's trading standards team and HM Revenue and Customs.
The team set up in Foxholes Road, off Hinckley Road, Braunstone, Leicester on Tuesday (April 23) between 11am and 5pm.
The action was part of a nationwide crackdown on crooked traders.
Detective Chief Inspector Siobhan Ashford said: "We must never underestimate the impact rogue traders have on their victims.
"Any steps to gather intelligence regarding their activities or apprehend them can only have a positive effect."
Officers found contraband cigarettes and cannabis in one vehicle and HM Courts enforcement officers arrested one person who owed court fines of £290, which he paid on the day.
Police and other agencies issued various fines or warnings for offences such as driving with no insurance, using a mobile phone at the wheel, not having a valid MOT certificate or road tax, not wearing a seatbelt, driving an unroadworthy vehicle or using illegal red diesel.
Further ANPR operations are being held across the city and county this week.
Detective Chief Inspector Rich Ward, who is leading the force's ongoing effort to reduce burglaries, said: "It is important to protect our communities from criminals who make use of the roads to cover their tracks.
"If you are concerned about suspicious individuals going door-to-door for business, please contact your local police. If you're not sure, don't open the door."
Contact Leicestershire Police on 101 or Crimestoppers, which is anonymous, on 0800 555 111.
