Training: BBS Methodology - The BBS Route [page 27/34] Stop Locations Stops are supposedly located at 0.5-mile (800 m) intervals; however, car odometers vary in accuracy, and safety issues may dictate some deviation from this ideal. The most important issue concerning stops is that all 50 stops should be made in exactly the same location from year to year. If your route map has stops marked on it or a list of stop descriptions attached, use those regardless of what your odometer or GPS unit indicates unless the marked stop locations are entirely unreasonable – in which case contact the BBS office. Update the stop descriptions each year as necessary and send copies to the BBS office. If no stop descriptions exists, please develop a set and submit a copy to the BBS office along with the route map. « Prev - Training Main Menu - Next » U.S. Department of the Interior | U.S. Geological Survey Eastern Ecological Science Center Laurel, MD, USA 20708-4038 BBS Homepage Contact Us Last Modified:  2/5/2023 BBS Privacy Statement