Safety Score Beta

Safety Score Beta

The Safety Score Beta is the first release of the Safety Score which is an assessment of your driving behavior based on five metrics called Safety Factors. These are combined to estimate the likelihood that your driving could result in a future collision. We combine your daily Safety Scores (up to 30 days) to calculate the aggregated Safety Score, displayed on the main ‘Safety Score’ screen of the Tesla app. You can find details around your daily Safety Score by selecting ‘Daily Details’ at the bottom of the screen.

The Safety Score Beta is intended to provide drivers transparency and feedback of their driving behaviors. The Safety Score is a value between 0 and 100, where a higher score indicates safer driving. Most drivers are expected to have a Safety Score of 80 or above.

The Five Safety Factors

There are five Safety Factors that impact your Safety Score. These are measured directly by your Tesla vehicle using various sensors on the vehicle and Autopilot software.

Forward Collision Warnings per 1,000 Miles
Forward Collision Warnings are audible and visual alerts provided to you, the driver, in events where a possible collision due to an object in front of the vehicle is considered likely without your intervention. Events are captured based on the 'medium' Forward Collision Warning sensitivity setting regardless of your user's setting in the vehicle. Forward Collision Warnings are incorporated into the Safety Score formula at a rate per 1,000 miles. The value is capped at 101.9 per 1,000 miles in the Safety Score formula.

Hard Braking
Hard braking is defined as backward acceleration, measured by your Tesla vehicle, in excess of 0.3g. This is the same as a decrease in the vehicle’s speed larger than 6.7 mph, in one second. Hard braking is introduced into the Safety Score formula as the proportion of time (expressed as a percentage) where the vehicle experiences backward acceleration greater than 0.3g relative to the proportion of time where the vehicle experiences backward acceleration greater than 0.1g (2.2 mph in one second). Hard braking while on Autopilot is not factored into the Safety Score formula. The percentage shown in the app is the percentage of manual braking that is done with excessive force when driving and Autopilot is not engaged. The value is capped at 7.4% in the Safety Score formula.

Aggressive Turning
Aggressive turning is defined as left/right acceleration, measured by your Tesla vehicle, in excess of 0.4g. This is the same as an increase in the vehicle’s speed to the left/right larger than 8.9 mph, in one second. Aggressive turning is introduced into the Safety Score formula as the proportion of time (expressed as a percentage) where the vehicle experiences lateral acceleration greater than 0.4g, in either the left or right direction, relative to the proportion of time where the vehicle experiences acceleration greater than 0.2g (4.5 mph in one second), in either the left or right direction. Aggressive turning while on Autopilot is not factored into the Safety Score formula. The percentage shown in the app is the percentage of turning that is done with excessive force when driving and Autopilot is not engaged. The value is capped at 17.1% in the Safety Score formula.

Unsafe Following
Your Tesla vehicle measures its own speed, the speed of the vehicle in front and the distance between the two vehicles. Based on these measurements, your vehicle calculates the number of seconds you would have to react and stop if the vehicle in front of you came to a sudden stop. This measurement is called “headway.” Unsafe following is the proportion of time where your vehicle’s headway is less than 1.0 seconds relative to the time that your vehicle’s headway is less than 3.0 seconds. Unsafe following is only measured when your vehicle is traveling at least 50 mph and is incorporated into the Safety Score formula as a percentage. Unsafe following while on Autopilot is not factored into the Safety Score formula. The percentage shown in the app is the percentage of unsafe following when driving and Autopilot is not engaged. The value is capped at 60.0% in the Safety Score formula.

Forced Autopilot Disengagement
The Autopilot system disengages for the remainder of a trip after you, the driver, have received three audio and visual warnings. These warnings occur when your Tesla vehicle has determined that you have removed your hands from the steering wheel and have become inattentive. Forced Autopilot Disengagement is introduced into the Safety Score formula as a 1 or 0 indicator. The value is 1 if the Autopilot system is forcibly disengaged during a trip, and 0 otherwise.

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Determining Your Safety Score

In order to calculate your daily Safety Score, we use the Predicted Collision Frequency (PCF) formula below to predict how many collisions may occur per 1 million miles driven, based on your driving behaviors measured by your Tesla vehicle. Driving on Autopilot (including 3 seconds after Autopilot is disengaged) will not be factored into the Safety Score formula, but the miles driven while on Autopilot are included in the total.

Predicted Collision Frequency (PCF) = 0.682854

x

1.014495Forward Collision Warning per 1,000 Miles

 

x

1.127294Hard Braking

 

x

1.019630Aggressive Turning

 

x

1.001444Unsafe Following Time

 

x

1.317958Forced Autopilot Disengagement

The current formula was derived based on statistical modeling using 6 billion miles of fleet data. We expect to make changes to the formula in the future as we gain more customer and data insights.

The PCF is converted into a 0 to 100 Safety Score using the following formula:

Safety Score = 115.382324 - 22.526504

x

PCF

Your daily Safety Score is not impacted by the number of miles or hours you drive. We combine your daily Safety Scores (up to 30 days) into a mileage-weighted average to calculate the aggregated Safety Score, which is displayed on the main ‘Safety Score’ screen of the Tesla app.

Note: Since vehicles with hardware older than Autopilot computer 2.0 do not measure following distance, Forward Collisions Warnings per 1,000 Miles and Unsafe Following Time is replaced by default values of 10.2 and 15.8% in the PCF formula, respectively. For these vehicles, the value of 115.382324 is replaced by 118.773666 in the Safety Score formula.

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Improving Your Safety Score

You can improve your Safety Score by improving each Safety Factor.

Forward Collision Warnings per 1,000 Miles
Maintain a safe following distance from the vehicle in front to give you enough time to react to slower or stationary vehicles. Pay attention to the other vehicles on the road and reduce speed in traffic congested areas.

Hard Braking
Engage the brake pedal early when slowing down, coming to a stop or reacting to a change in your environment. Use regenerative braking whenever possible and safe to do so. Maintaining a safe following distance reduces the instances where the brake pedal needs to be applied with extreme force.

Aggressive turning
When turning, changing lanes or rounding a corner, do so gradually. Reduce your speed heading into a turn, gradually accelerating out of the turn. Do not unnecessarily jerk the steering wheel.

Unsafe Following
Do not tailgate or drive close to the vehicle in front. Maintain a following distance of several car-lengths to the vehicle in front to have sufficient time to react to its speed. Remember that driving at higher speeds in inclement weather or on slick road surfaces requires a greater following distance to allow sufficient time to react safely.

Forced Autopilot Disengagement
Only use the various Autopilot features as described in your Owner’s Manual. Pay attention to the road and maintain your hands on the steering wheel while the Autopilot system is engaged. Autosteer detects your hands by recognizing slight resistance as the steering wheel turns, or from you manually turning the steering wheel very lightly (without enough force to take over steering). Autosteer also qualifies your hands as being detected if you engage a turn signal or use a button or scroll wheel on the steering wheel.

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Frequently Asked Questions

What’s required for me to get a Safety Score for my vehicle?
When available for your vehicle, you will see 'Safety Score' on the home screen of the Tesla app. To receive a Safety Score:

Will I receive a Safety Score if I don’t have connectivity?
In the event that your vehicle does not have cellular connectivity while on a trip, you may not receive immediate feedback upon the end of your trip. You will receive your updated driving information and Safety Score once your vehicle has connectivity. Premium Connectivity is not required to receive a Safety Score.

How often will my Safety Score be updated?
In order to provide you real-time feedback on your driving safety, every time you take a trip in your Tesla vehicle, your Safety Score for that day will be updated. At the end of each day, your Safety Score for that day will no longer change — any subsequent trips will be used to determine your Safety Score for the following days.

In the event that you do not have cellular connectivity, you may not receive immediate feedback upon the end of your trip. You will receive your updated driving information once you have connectivity.

Is all my driving captured?
Tesla captures driving over all trips, where a trip consists of any driving (including reversing and Autopilot usage) occurring between the time the vehicle is powered on and able to be driven to the time the vehicle is powered off. Any driving and accrued mileage occurring while in service mode is excluded. Trips less than 0.1 miles will be excluded from scoring calculations. Driving on Autopilot (including 3 seconds after Autopilot is disengaged) will not be factored into the Safety Score formula, but the miles driven while on Autopilot are included in the total.

I had a Forward Collision Warning while Autopilot was engaged. Will my Safety Score be impacted?
No. The Safety Score formula ignores any events (not just Forward Collision Warnings) that occur while Autopilot is engaged (including 3 seconds after the Autopilot is disengaged) and appropriately utilized. This does not include Forced Autopilot Disengagement.

Miles driven while Autopilot is engaged is used to determine the Forward Collision Warnings per 1,000 Miles. Miles driven on Autopilot are also considered when calculating the mileage-weighted Safety Score.

How will I know that I have experienced an event that would contribute to my Safety Factors and Safety Score?
Your vehicle provides you with a range of safety features that include warnings and alerts to help protect you, your passengers, other drivers and pedestrians around you. View the Owner’s Manual for specific details about the various safety features in your vehicle.

Review the following to learn more about how an event contributes to each Safety Factor:

How does my Safety Score work if I have more than one vehicle?
Your Safety Score is vehicle specific. If you have more than one Tesla vehicle, each one of your Tesla vehicles will have its own Safety Score.

What happens to my Safety Score if I sell my vehicle?
If the vehicle ownership changes, the Safety Score data previously collected will not be used for the vehicle under the new owner, nor will it be used for a new Tesla vehicle you purchase.

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