Answer #1: How is Driver score calculated?

Why is it that some drivers have the same amount of speeding violations, but their Driver score is different? To answer this question, let's look at how the Driver score is calculated.

The Driver score is an average of a driver's efficiency and safety.


The Efficiency score is the number of occurrencies of idling, hard braking and hard accelerations, divided by the distance driven.

Efficiency = ( Idling + Hard Braking + Hard Accelerations ) ÷ Distance Driven


The Safety score is the number of speeding violations, multiplied by three and divided by the distance driven. (Speeding is multiplied by three order for the Safety score to have the same "weight" as the Efficiency score).

Safety = (Speeding violations x 3) ÷ Distance driven 


Driver score = ( Safety score + Efficiency score ) ÷ 2

This means that Driver score results can at times appear counterintuitive. For example:

More speeding violations, better score?

Phillip has five speeding violations, while Jen has four. Yet Phillip has a higher Driver score than Jen. How is this possible? Because Phillip had twice the mileage, thereby demonstrating safer driving for the distance driven.

Different idling, same efficiency?

John has 15 occurrences of idling, while Miranda has 10. They have the same Efficiency score. Why? Because John had 50% more mileage than Miranda, thereby averaging the same efficiency.

-Bomi Tella
Customer Happiness Engineer