National Traffic Speeds Survey I: 2007. Traffic Tech: Technology Transfer Series.

摘要

Vehicle speeds are a crucial factor in traffic safety. NHTSA estimates that speeding is involved in approximately 31% of fatal motor vehicle crashes, costing society over $40 billion per year. Since speeding is such a pervasive traffic safety issue, NHTSA funded a field survey to measure driving speeds for all types of motor vehicles on freeways, arterial highways, and collector roads across the United States and to produce national and regional estimates of travel speeds for various types of roads and vehicles.