on the freeway, i drive as fast as the fastest person i can find to drive in front of me by about a 1/2 mile (bonus if they have a radar decector i can leech off of).  that's usually 80-90 MPH, although if it's safe, i'll follow someone up to 95 MPH. past that, my accord is working harder than i like. in town, less than 5 over the limit, sometimes not at all. too many variables in town: kids, pets, distracted drivers, etc. i did a report on speed limits and one of the things i found is that  per mile driven, you are 300% more likely to die at 35 MPH than at 85 MPH, and that's a testament to how much more dangerous it is to drive in the city (even at the speed limit) than it is to speed on the freeway.