Crash Query

The following formulas are used in the Crash Query application. The table below defines the terms used in the formulas:

Comparison Report Percent Change (Annualized)

The expression used to determine the Annualized Percent Change in a comparison report is:

Crash Report Percentages

The expression used to determine the percentages in Crash Reports is:

Network Screening 

The following formulas are used in the Network Screening application. The table below defines the terms used in the formulas:

Crash Ratio

The expression used to determine the Crash Ratio on a segment of roadway is:

Crash Rate for Segments

The expression used to determine the Crash Rate on a segment of roadway is:

Crash Rate for Intersections

The expression used to determine the Crash Rate in an Intersection is:

Crashes Per Mile

The expression used to determine Crashes Per Mile on a segment of roadway is:

Expected Crash Rate

The Expected Crash Rate is the state-provided SPF.

Serious Rate

The expression used to determine the Serious Crash Rate on a segment of roadway is:

Fatal Rate

The expression used to determine the Fatal Crash Rate on a segment of roadway is:

Safety Analysis 

The following formulas are used in the Safety Analysis application. The table below defines the terms used in the formulas:

Benefit

The expression to determine Benefit on a segment of roadway is:

Benefit Cost Ratio

The expression to determine Benefit Cost Ratio on a segment of roadway is:

Unique Benefit

The expression to determine Unique Benefit on a segment of roadway is:

Annual Crashes Reduced

The expression to determine Annual Crashes Reduced on a segment of roadway is:

Annual Severe Crashes Reduced

The expression to determine Annual Severe Crashes Reduced on a segment of roadway is:


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