Ann Arbor, like most cities, is currently struggling to pay the bills. It’s rare that metaphysics can help with these problems, but this case is different.
The city has recently raised the parking rates: It used to cost $1 per hour to park next to the city library. Now the rate is published like this:
60 cents per half hour for the first three hours, and 70 cents per half hour and part thereof after the first three hours.
Given the number of parts of half hours, it seems pretty steep to me.