I purchase the parking decar every year with which I can park anywhere in Downtown where there is a sign saying "No Parking except with Permit." It is useful when shopping around Downtown by car because I don't have to pay for parking anymore. The cost for parking meters in Downtown is between $1 and $4 per hour, and this decar costs $56 per year, therefore if I pay for the former more than once a week the latter pays. The problem is that the number of cars in Downtown is getting larger these years and it is getting more difficult to find a parking space even with the sign "No Parking except with Permit." According to this picture, the parking decar system has been operated for at least 6 years, but I wonder how many more years it would last because extending the parking space in Downtown is impossible while the cars are always increasing.