When I was in college, the local towing company gave to the city a street sweeping machine. Naturally, that machine needed to be used, and to use it, there can'

When I was in college, the local towing company gave to the city a street sweeping machine. Naturally, that machine needed to be used, and to use it, there can't be any cars along the side of the road. That led to new rules about what side of which street on which day has parking prohibited. Naturally, the city had to call the tow truck company to remove any cars that parked in the way of their new sweeper.