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

Long Description

The predicted number of intersection-related crashes equals the product of the average total crash frequency for intersection-related crashes and the crash modification factor for the left turn lanes with respect to total crashes and the local calibration factor. (Equations with turn lane CMF and the local calibration factor)
Total crashes is calculated as:

• Total number of predicted existing intersection-related crashes equals the product of 12.80 and 1.0 and 1.0 equals 12.80. (Existing)
• Total number of predicted alternative intersection-related crashes equals the product of 12.80 and 0.52 and 1.0 equals 6.66. (Alternative)

Fatal plus injury crashes is calculated as:

• Predicted existing fatal and injury intersection-related crashes equal the product of 7.94 and 1.0 and 1.0 equals 7.94. (Existing)
• Predicted alternative fatal and injury intersection-related crashes equal the product of 7.94 and 0.42 and 1.0 equals 3.33 (Alternative)

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