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

Long Description

Diagram with two paths leading to an end state of Calculate Total Predicted Crashes N_{predicted int} + N_{predicted ru} = N_predicted.

Path 1:

• Predict Intersection Average Crash Frequency for Base Conditions * N_{spf int}
• Predict Intersection Alternative-Specific Average Crash Frequency N_{predicted int}

Path 2:

• Predict Segment Average Crash Frequency for Base Conditions * N_{spf ru}
• Predict Segment Alternative-Specific Average Crash Frequency N_{predicted ru}

*Intersection base condition: No turn lanes (HSM p.11-20)
Segment base conditions: 6' shoulders & lanes ≥ 1' (HSM p. 11-14)

[Return to diagram. ]