Not rocket science… A new ad campaign in Philadelphia hopes to spare the lives of pedestrians and bicyclists. It is designed to reduce the city’s pedestrian-and-cyclist fatalities, which occur once every 13 days, on average. One ad shows the international image of a pedestrian with the line, “Thank you for not running pedestrians over.” Still another shows the image of a cell phone with the tagline, “The most dangerous part of your commute.” It’s all part of a new messaging campaign, “Not Rocket Science,” from Mayor Michael Nutter’s Office of Transportation and Utilities. Simple, bold, concise with a bit of Philly attitude. All very RIGHT…