§Federal Highway
Administration
¥ Report No. FHWA/RD-85/096 Technical
Summary, "Synthesis of Speed Zoning
Practice" which states:
§"Based on the best available evidence, the speed limit
should be set at the speed driven by 85 to
90 percent of the free-moving vehicles rounded up to the next 5 mph increment. This method results in speed limits
that are not only acceptable to a majority of the
motorist, but also fall within the speed range where accident risk is lowest.Ó
¥ ÒNo other factors need to be considered since they are
reflected in the drivers speed choice.Ó