The Equivalent Property Damage Only (EPDO) Method takes into account total number of crashes at a location and the severity of each crash.  This system is currently used by MassHighway in its development of the Top 1000 Crash Locations in the State of Massachusetts.

The EPDO method is a system of ranking intersections in terms of safety.  The system is point based with different types of crashes receiving different point values.  The rankings are as follows:

• 1 point for a Property Damage Only Crash or Not Reported/Unknown Severity Crash
• 5 points for an Injury Crash
• 10 points for a Fatal Crash

The formula for determining the EPDO is as follows:

EPDO = (1 x Property Damage Only Crash) + (5 x Injury Crash) + (10 x Fatal Crash)