Safety Score Beta

The Safety Score Beta is an assessment of your driving behavior based on several 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 to encourage safer driving and potentially pay less for their insurance. 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.

To see more details about Safety Score and how it’s calculated, you need to determine if you are currently enrolled on version 1, or version 1.2 of the Safety Score program. To determine which version you are enrolled in, open the Tesla app and scroll to the bottom of the ‘Safety Score’ screen.

Safety Factors

There are several 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 warning
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 while on Autopilot are not factored into the Safety Score formula. 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
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

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
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
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 not applied sufficient resistance on the steering wheel or 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.


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 Warnings 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 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 118.23762166 in the Safety Score formula.

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.

Frequently Asked Questions Show All Hide All

What Changed in Version 1.2

Safety Score version 1.2 features several updates including a new Safety Factor and updates to how your driving behavior is measured and Safety Score calculated. Here are the key changes from version 1 to version 1.2:

  • Provided a visualization of your trip, as a timeline, to show when specific events that impacted your Safety Score occurred. To protect your privacy, no location data is provided.
  • Added Late Night Driving as a new Safety Factor. More time spent driving at night will lead to a lower Safety Score.
  • Increased grace period after Autopilot disengages from 3 seconds to 5 seconds.
  • Updated hard braking and aggressive turning Safety Factors to count the number of events instead of the duration of events.
  • Updated Forward Collision Warning rate Safety Factor to calculate the rate of warnings per 1,000 miles driven while not using Autopilot.
  • Updated Safety Score to use the miles-weighted average of the last 30 day’s Safety Scores, ignoring any miles driven on Autopilot.

Safety Factors

There are several 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 warning
Forward Collision Warnings per 1,000 Non-Autopilot 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 as a rate per 1,000 non-Autopilot miles. The value is capped at 117.5 per 1,000 non-Autopilot miles in the Safety Score formula.


Hard braking
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 number of times where the vehicle experiences backward acceleration greater than 0.3g as a percentage of the number of times 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 proportion of brakes done with excessive force when driving and Autopilot is not engaged. The value is capped at 10.9% in the Safety Score formula.


Aggressive turning
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 number of times the vehicle experiences left or right acceleration greater than 0.4g as a percentage of the number of times the vehicle experiences left or right acceleration greater than 0.2g (4.5 mph in one second). Aggressive turning while on Autopilot is not factored into the Safety Score formula. The percentage shown in the app is the proportion of turns  done with excessive force when driving and Autopilot is not engaged. The value is capped at 22.9% in the Safety Score formula.


Unsafe following
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 63.2% in the Safety Score formula.


Forced Autopilot disengagement
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 not applied sufficient resistance on the steering wheel or 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.


Late Night Driving
Late Night Driving

Late Night Driving is defined as the number of seconds you spend driving at night (10 PM - 4 AM) divided by the number of seconds you spend driving total during the day and night. Drive sessions that span two days will apply to the day the trip ends. Late Night Driving includes all driving at night including any driving done on Autopilot. The value is capped at 29.3% in the Safety Score formula.


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 5 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) = 0.41978002

x

1.01078171Forward Collision Warnings per 1,000 Non-Autopilot Miles

 

x

1.10385444Hard Braking

 

x

1.00987874Aggressive Turning

 

x

1.00204867Unsafe Following Time

 

x

1.11521955Forced Autopilot Disengagement

 

x

1.03251597Late Night Driving

The current formula was derived based on statistical modeling using 8 billion miles of fleet data. We expect to make further 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 = 112.31281298 - 29.33158388

x

PCF

Your daily Safety Score is not impacted by the number of miles 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 non-Autopilot miles and Unsafe Following Time is replaced by default values of 11.9 and 21.4% in the PCF formula, respectively. For these vehicles, the value of 112.31281298 is replaced by 114.51988917 in the Safety Score formula.

Improving Your Safety Score

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

Forward Collision Warnings per 1,000 Non-Autopilot 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.

Late Night Driving

Plan your trips to avoid driving between the hours of 10 PM and 4 AM to help reduce the likelihood of a dangerous driving environment.

Frequently Asked Questions Show All Hide All