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Appendix B: Crash Incidence Explanatory Model (Task 2)
Pages 139-139

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From page 139...
... on a given road segment SegmentLength = Road segment length in miles AADT = Annual average daily traffic SpeedLimit = Posted speed limit (for Washington only) NumberLanes = Number of lanes LaneWidth = Lane width in feet RightShoulderWidth = Right shoulder width in feet Terrain = Three-level variable relating to the frequency and steepness of hills; values are coded to be either Level, Rolling, or Mountainous (for Washington only)

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