The SDDOT often relies on the Institute of Transportation Engineers (ITE) Trip Generation Manual to provide guidance in determining the impacts of new development adjacent to our highways. Many of the ITE trip generation rates were developed for large urban areas and therefore may over estimate the amount of traffic being generated in rural areas such as South Dakota. The SDDOT needs to verify if the ITE Trip Generation rates for major traffic generating businesses such as Wal-mart, Menards, Cabelas, and other business office buildings overestimate the amount of traffic that can be expected to be generated for these types of businesses. The Office of Road Design does not have sufficient information available to determine if the projected traffic for these businesses is accurately documented in the traffic analyses that are required as a part of the site development plan. Since traffic signals, turning lanes, and other improvements are designed and installed in response to the projected traffic volumes, we must be certain that the Manual of Uniform Traffic Control Devices (MUTCD) Traffic Signal Warrants are met before traffic signals or other highway improvements are completed. We should also review how other rural states in the mid-west use the ITE trip generation rates, to find out if their rates have been modified to more accurately reflect their rural nature.