in traffic with traffic signals every 100 feet, there is no point to driving fast or agressive unless you run all the red lights and can fly over other cars. On the expressway ... I generally dont drive agressive but I usually keep a decent pace (between 80 and 110 mph depending on where I am and what time it is, unless I am downtown or something and its rush hour (in chicago, thats like 6AM-11AM or 2PM thru 8PM) If its rush hour then stop and go traffic .. and that pisses me off. I am glad I am in the Suburbs and i dont have to deal with the city traffic every day.