The Safety Score on the Safety Report is calculated using a mix of Total Harsh Events, Total Miles Driven, Total Time Driven and Time Over Speed Limit.

Starting with a potential safety score of 100, subtract 1 for every Harsh Event per 1000 miles driven, then subtract the percentage of Time Over Speed Limit of the Total Time Driven.

We can find Brian Smith's score in the example pictured above using the following equation:

100% - ( 5 Harsh Events / 247 miles driven * 1000 miles ) - ( 1h 9m over speed limit / 8h 40m total time driven ) = 67%