Samsara calculates the safety score using a mix of harsh events, speeding events, and AI-detected unsafe driving behavior events over time. The safety score surfaces throughout the dashboard, such as in the Safety Overview and in the Driver Coaching Workflow, to encourage positive driving behaviors and to coach drivers to reduce unsafe driving practices and minimize the likelihood of accidents.
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To help you quickly and easily identify safety score severity, the Samsara dashboard displays safety scores with the following default color-coded indicators to represent the range of the safety score performance:
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To configure the safety score performance band ranges for your fleet, see Configure Performance Band Ranges.
Each event is assigned a Safety Score weight based on the severity of the offense. To customize the safety score weights to highlight the behaviors that matter to you the most, see Safety Score Weights and Configuration.
Samsara automatically calculates the safety score for drivers and vehicles. If you view multiple drivers or vehicles, such as in the Safety Overview, the calculation aggregates the total behavior data. To see how behaviors and weights can impact the Safety Score, you can manually calculate the Safety Score for a driver during any given time period. When you calculate the Safety Score, observe the following considerations:
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For calculations that involve distance, use miles as the unit of measure, regardless of the region.
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If a driver has not yet logged any distance, the driver will have a Safety Score of 0. Only drivers with driving distance display a Safety Score.
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Each driver has a maximum potential safety score of 100 and a minimum potential safety score of 0.
You can calculate the safety score of each driver or vehicle using the following equation:
Safety Score = 100 - (sum of all score impacts)
Where the sum of all score impacts is total value of the impact to the safety score for all unsafe driver behaviors. The calculation of the impact to the safety score is dependent on the behavior type:
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Speeding behaviors: (Time spent speeding x weight) / (total time driving / 100)
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AI Following Distance, AI Distracted Driving: (Number of events x weight) / total time driving
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All Other Behaviors: (Number of events x weight) / (total miles driven / 1000)
To reinforce positive driving behaviors such as Defensive Driving, the weight is a negative value; therefore, subtract the impact score value from the score impact calculation.
Samsara utilizes color-coded performance bands to visually represent the safety scores that display in reports and for coaching activities.
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To modify the performance range that displays for each color:
Samsara recommends that you inform your drivers that certain data collected about their driving will be used to calculate a Safety Score and recommends that you provide drivers with materials about the Safety Score configuration and calculation specific to your organization. Safety Scores should be used primarily for coaching and training purposes and to help build a safety culture within your organization. Employment decisions including, but not limited to, those involving hiring, termination, compensation, and route and hours assignments should never be based on Safety Scores alone and should always only be one data point for an employment decision that is ultimately made by a supervisor or other employee.
