Driving speed is an important traffic safety issue. The lack of adherence to posted speed limits is a safety concern, especially on university campuses where the populations of drivers are at increased risk for crashes involving speeding due to their young age. Thus, driver speed and knowledge of speed limits on university campuses is an important safety issue that must be further investigated. This study examines driver knowledge of posted speed limits and their self-reported driving speeds at Clemson University. In Brooks et al.'s (2009) prior study, vehicle volumes and actual travel speeds were collected on roadways throughout Clemson University's campus. While that study provided information about actual driver behavior on campus, in this study the authors wanted to examine the possible causes of the behavior, such as a lack of awareness of speed limits or the individual's intention to speed. Investigating driver knowledge of posted speed limits and self-reported speed behavior on the Clemson University campus roads allows for a comparison between actual and perceived adherence to speed limits on campus. The study was designed to provide information about what drivers think and know about the speed limits on different roads on campus. Drivers consistently reported the speed limit to be higher than the actual posted speed limit and further reported exceeding the speed when driving. Drivers knowingly speed over their self-reported speed limits; however, they are unaware how drastic this choice actually is when compared to the actual posted speed limit. The decision to speed is exceptionally risky due to the considerable amount of pedestrian traffic adjacent to campus roads. This information implies that certain roads on campus should be evaluated to decide if the risk of through vehicular traffic on campus is worth the convenience. (Contains 2 figures.)