Scale and Scope of Safety Assessment Methods in the Project Development Process

Long Description

• The expected number of Multi-Vehicle total crashes for the segment under unique design conditions for fatal plus injury crashes is equal to 0.378 crashes per year or 1.135 crashes per 3 years. (Total number of multi-vehicle FI expected crashes (in 3 years) is 1.135 crashes.)
• The expected number of Multi-Vehicle total crashes for the segment under unique design conditions for property damage only crashes is equal to 0.648 crashes per year or 1.946 crashes per 3 years. (Total number of multi-vehicle PDO expected crashes (in 3 years) is 1.946 crashes.)
• The expected number of Single-Vehicle total crashes for the segment under unique design conditions for fatal plus injury crashes is equal to 0.706 crashes per year or 2.110 crashes per 3 years. (Total number of single-vehicle FI expected crashes (in 3 years) is 2.110 crashes.)
• The expected number of Single-Vehicle total crashes for the segment under unique design conditions for property damage only crashes is equal to 1.107 crashes per year or 3.320 crashes per 3 years. (Total number of single-vehicle PDO expected crashes (in 3 years) is 3.320 crashes.)

The expected number of total crashes for the segment under unique design conditions for all crash types and severities is equal to the sum of the expected number of multi-vehicle crashes for fatal and injury crashes and the expected number of multi-vehicle crashes for property damage only crashes and the expected number of single-vehicle crashes for fatal and injury crashes and the expected number of single-vehicle crashes for property damage only crashes equals 8.512 crashes per 3 years. (Total number of expected crashes (in 3 years) is 8.512 crashes.)

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