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Statutory speed limits are established by State legislatures for specific types of roads (e.g., Interstates, rural highways, urban streets) and can vary from State to State. They are enforceable by law and are applicable even if the speed limit sign is not posted. Examples of statutory speed limits include:
Speeding, commonly defined as exceeding the posted speed limit or driving too fast for conditions, is a primary crash causation factor across the globe. Based on a survey of road safety performance,
This report presents the procedures that highway agencies can and do use to set speed limits. As an informational report it provides a broad overview of the different speed limit setting methods that are available for use, but it makes no specific policy recommendations or suggestions.
ͧ Establish speed limits that are appropriate to the primary purpose of the road, provide a balance between mobility and safety for all roadway users, and meet all state or local legal requirements. ͧ Design roads that produce desired speeds. ͧ Introduce physical countermeasures to create a self-regulating roadway
It requires that speed limits be posted in increments of 5 mi/h (8 km/h) and that speed limits in speed zones be based on an engineering study and analysis of free flow speeds (speeds that are unimpeded by other vehicles, stop signs, signals, or inclement weather).
2 mar 2017 · FHWA-SA-16-076. Speed limits frame expectations for drivers and other roadway users. Properly set speed limits provide a safe, consistent, and reasonable speed to protect drivers, pedestrians, and bicyclists along the roadway.
1 sty 2021 · Addressing speed is fundamental to the Safe System Approach to making streets safer, and a growing body of research shows that speed limit changes alone can lead to measurable declines in speeds and crashes.
