If you consider how many accidents occur because of speed and momentary inattentiveness, then you can understand why we have speed limits. Unless your a UFO driver from mars, you probably should obey speed limits no matter how long it has been there. One, if you crash anyway you won't end up as mangled. Two, you're late to something driving 20 mph faster doesn't get you from home to work 5 highway miles away much faster. Three, there are jobs people have that take into account how people drive in an area and how the roads are, so they set the limit to keep people from getting hurt. So all in all, speed limits are to help keep people safer. No one is an acception, we all drive at different skill levels, but that doesn't mean nothing can happen to you.