Scope of Study

The speed zone study should cover the entire length of a potential zone, even though an analysis of the data may later indicate that the actual limits of the area that requires zoning are less than the limits of the potential zone.
A speed zone study consists of the following principle areas:
  • determining the 85th percentile speed
  • crash study
  • developing of strip maps
  • speed zone design
  • rechecks of speed zones.
This chapter contains sections describing each of these areas.