Rose Hammond advocated for reduced speed limits on a busy road near her assisted living community and nearby schools, citing public safety concerns. An analysis revealed that the current speed limit was 5 mph too low based on the outdated 85% rule, which correlates speed limits to the 15th-fastest vehicle on the road. This rule is criticized for creating a cycle of speeding and elevated limits. The National Association of City Transportation Officials has proposed the "City Limits" approach to improve speed limit decision-making practices.
Rose Hammond persistently urged local authorities to reduce the speed limit on a road near her assisted living community and schools, fearing for public safety.
Despite community concerns, an analysis revealed that the posted speed limit was actually 5 mph lower than the suggested speed based on historical studies from the 1930s and 1940s.
The 85% rule suggests that speed limits should reflect the speed of the 15th-fastest vehicle, which can create a cycle of increasingly high speed limits as drivers adjust their speeds.
An alternative approach, called "City Limits," developed by the National Association of City Transportation Officials, seeks to address the shortcomings of the 85% rule regarding safety.
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