Many big cities have cameras to ticket red light runners. Chicago is considering doing one better by scanning every car going by for up to date insurance. This would provide tax revenues in excess of $100 million dollars to the city if people pay their fines. It doesn't matter if you drive conscientiously or ran a light you would still get a ticket if you didn't have insurance.
The proposed system would utilize both existing stoplight cameras and general security cameras to scan your plate for valid insurance through the InsureNet database. If InsureNet's database discovered that you were lacking insurance, you would receive a $300-$500 ticket in the mail. InsureNet gets a 30% cut of the revenues for their service.