Public parking decks are marked with a capital P. 

Free parking in decks for the first 60 minutes, and flat fee of $0.50 cents per hour thereafter.
Free parking on the weekends starting at 6:00 p.m. on Friday and ending 6:00 a.m. on Monday.
Also, parking is FREE week nights starting at 6:00 p.m. and ending at 6:00 a.m. the following morning.

Effective January 1, 2007 click here