this is st. louis county, missouri. >> now we're out and ready to go to upland parks. >> reporter: it's made up of about 90 different municipalities. i feel like this is every mile or half mile. >> now we're in normandy. >> reporter: a life time resi res resident gave us a tour, we're here because traffic stops aren't always about safety or hunting crime, some communities use traffic stops to raise money. this new york times analysis tells it bes, more than 730 municipalities across the u.s. that depend on tickets and fees for at least 10% of their revenue. these are relatively small cities, right? >> but they're making lots and lots of money on ticket revenue, because they have to, it's not coming from property taxes. >> reporter: she says it has