If you're planning on being downtown for the Friday evening rush hour, be careful! Broad Street will be shut down to allow for a ferris wheel and street performances for PIFA, beginning at 1PM Friday and continuing into the weekend. Might be a good time to take a train.
Here's a link: Street festival, Parisian-style, to shut Broad Street | Philadelphia Inquirer | 04/27/2011
Delaware Valley Association of Rail Passengers
1601 Walnut St., Suite 1129
Philadelphia, PA 19102-2913
phone: 215-RAILWAY (215-724-5929)