FAQ - Terms
FAQ
01. Is it ok if I don't have a track focused vehicle?

Absolutely, this is the main purpose of VPR. As long as your vehicle is well maintained and performs consistently, it should enable you to focus solely on your driving.

02. Does a better lap time give me more odds for a good Driving Score ?

It certainly does.

03. With what kind of vehicles will VPR work?

At the moment in all cars, motorcycles, go-karts, and trucks. Check terms 7.2 and 7.3 for some Driving Score related exceptions.

04. Any high Driving Score tips?

Use a certified instructor and in case you feel fading on your brakes, tyres, or engine power, cool down your car and stop your session. After any issues have been resolved try a new session where you will have more chances for a better Driving Score.

 

05. Any high Driving Score technical tips?

A solid, balanced and reliable vehicle can provide consistent performance and more odds for high Driving Scores. Also consider using a vehicle that suits your driving skills.

06. My lap time is worse than the previous session but my Driving Score is better. Why this happened?

This might happen for various reasons but most probably the overall grip level due to track conditions or tyre wear may be lower which results in a less capable vehicle. You were awarded a better Driving Score because you managed to use more efficient the currently available vehicle capabilities. 

07. My session was ranked as Invalid. Why has this happened?

This might happen if the VPR algorithm realises that the actual performance of the vehicle does not match the data collected during this session.

08. Can I compare Driving Scores from different race tracks?

In many cases yes but there are some occasions where the morphology of different routes vary significantly. Therefore, VPR’s recommendation is to compare and use as reference Driving Scores from the same track.

09. How can I download my driving data file?

After each driving session a .vbo data file is being generated. You can download this file by clicking the download button located next to the session number at your Personal Results page.

10. How can I use VPR?

Currently VPR is used in specific events. Ask the event organiser for availability or get in contact with us.

11. What if the user is not able to push his vehicle at it's limits?

In this case a low Driving Score will be provided due to a relatively slow lap time. If the user drives slow, up to a certain extend, the driving session will be marked as INVALID.

12. What happens if the user is trying to "cheat" the algorithm by trying to achieve less lateral grip?

In most cases the VPR algorithm will identify any intention for cheating and will mark the driving session as INVALID. Even if the VPR algorithm could not do so, it is almost impossible to drive consistently on a specific grip level so the Driving Score will be lower than the one which could be achieved if the driver was trying to reach the vehicle’s limits.

13. What happends if the user is trying to "cheat" the algorithm by trying to achieve less acceleration?

In most cases the VPR algorithm will identify the intention for cheating and will mark the driving session as INVALID. Even if the VPR algorithm could not do so, it is almost impossible to drive consistently at a specific acceleration level so the Driving Score will be lower than the one which could be achieved if the driver was trying to reach the vehicle’s limits. For the vehicles with various power modes, a consistent Driving Score will be provided only if the power is not altered during the driving session.

14. Why Driving Score accuracy might be compromised in motorcycles?

Even though we already provide all Vehicle Dynamics data with maximum accuracy for motorcycles as well, the Driving Score is a feature which is currently undergoing development and will be fine tuned in the near future.

Terms
01. SAFETY

All “Vehicle Performance Rating” [VPR] users shall follow the Organiser’s rules and stay away from any kind of wheel to wheel competition among themselves. If it is clearly established that these rules have been broken, the user may be Disqualified [DSQ].

02. FAIR PLAY

Fair play is the no1 fundamental value of “Vehicle Performance Rating” [VPR].

2.1  Users shall proceed in compliance with all recognized principles of sportsmanship and fair play.

2.2  The fairness and accuracy of “Vehicle Performance Rating” [VPR] is related to the live data which Symmetry collects. Users should aim for the best performance that the driver/vehicle combination can achieve under the certain circumstances. If it is clearly established that these principles have been violated on purpose, the user may be Disqualified [DSQ] for a certain session, or even the entirety of the event.

03. DISCLAIMER

All those who use “Vehicle Performance Rating” [VPR] do so at their own risk and responsibility. Each user or, in the case of minors or persons who do not have full legal capacity and liability, the responsible adult agrees and acknowledges that:

3.1  They are aware of the inherent element of risk involved in the sport and accept responsibility for the exposure of themselves, others, other property and their own vehicle to such inherent risk whilst using VPR.

3.2  They are solely liable and responsible for the safety of themselves, their vehicle and their other properties.

3.3  They accept responsibility of any injury, damage and indirect damage.

3.4  Their vehicle is in good order, properly maintained and they are officially licenced, fit and healthy to drive the vehicle that has been fitted with a VPR device.

3.5  VPR bears no responsibility or liability for any injury, damage, indirect damage or loss to the extent that such occurred while using any aspect, characteristic, mechanism or item otherwise related with Vehicle Performance Rating and the equipment that Vehicle Performance Rating provides and/or is connected with.

3.6  They accept the VPR results.

3.7  They accept that VPR may update the sofware, or firmware, or hardware that VPR use.

04. VEHICLE APPLICATION

“Vehicle Performance Rating” [VPR] works on any kind of car, kart, motorbike or truck where the Symmetry device has been properly fitted.

05. RESULTS

5.1  “VPR League”

“Vehicle Performance Rating” [VPR] provides the following VPR League results:

 

5.1.1  “VPR Driving Score League”

a) Date. This is the date of the best driving score the user achieved, of all time, at the specific track. 

b) Driving Score [%]. This is the best Driving Score, of the user, of all time, at the specific track. This value should be used as reference.

c) Diff (gap) [sec]. This is an indication of the lap time’s difference and gap relatively to the best Driving Score.

d) Best Lap [m]. This is the Lap Time of the best Driving Score lap, of the user, of all time, at the specific track.

e) Distance [metres]. This is the covered distance of the fastest lap, of the session with the best Driving Score, of the user, of all time, at the specific track.

f) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap, of the session with the best Driving Score, of the user, of all time, at the specific track.

g) Max Speed [km/h]. This is the maximum logged speed of the fastest lap, of the session with the best Driving Score, of the user, of all time, at the specific track.

h) Acceleration [g]. This is the average of the best longitudinal accelerations at the straight lines, of the session with the best Driving Score, of the user, at the specific track, of all time.

i) Lateral [g]. This is the maximum sustained lateral grip of the session with the best Driving Score, of the user, of all time, at the specific track.

j) Braking [g]. This is the maximum sustained deceleration of the session with the best Driving Score, of the user, of all time, at the specific track.

 

5.1.2  “VPR Lap Time League”

a) Date. This is the date of the best lap time the user achieved, of all time, at the specific track. 

b) Best Lap [m]. This is the best Lap Time, of the user, of all time, at the specific track.

c) Diff (gap) [sec]. This is an indication of the lap time’s difference and gap relatively to the best Lap Time.

d) Driving Score [%]. This is the Driving Score of the best lap time the user achieved, of all time, at the specific track.

e) Distance [metres]. This is the covered distance of the best lap time, of the user, of all time, at the specific track.

f) Min Apex Speed [km/h]. This is the minimum logged speed of the best lap time, of the user, of all time, at the specific track.

g) Max Speed [km/h]. This is the maximum logged speed of the best lap time, of the user, of all time, at the specific track.

h) Acceleration [g]. This is the average of the best longitudinal accelerations at the straight lines, of the best lap time, of the user, at the specific track, of all time.

i) Lateral [g]. This is the maximum sustained lateral grip of the best lap time, of the user, of all time, at the specific track.

j) Braking [g]. This is the maximum sustained deceleration of the best lap time, of the user, of all time, at the specific track.

Note: The green background values are the best values from all the results. At “Lap Time” and “Distance” the best value is the smallest one. “

 

5.2  “Personal results”

“Vehicle Performance Rating” [VPR] provides the following Personal results:

a) Lap. Lap number.

b) Driving Score [%]. This is the Driving Score of each lap. This value should be used as reference.

c) Lap time [m]. This is the logged time of the lap.

d) Min Apex Speed [km/h]. This is the minimum logged speed during the lap.

e) Max Speed [km/h]. This is the maximum logged speed during the lap.

f) Distance [metres]. This is the covered distance during the lap.

g) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session.

h) Lateral [g]. This the maximum sustained lateral grip of the session.

i) Braking [g]. This is the maximum sustained deceleration of the session.

Note: The green background values are the best values from all the results. The blue backround values are the best values of each session. If a value is both green and blue then the green colour is applied. At “Lap Time” and “Distance” the best value is the smallest one. “

 

5.3  “Overall results”

“Vehicle Performance Rating” [VPR] provides the following Overall result formats :

 

5.3.1  “Ranking based on the Driving Score” 

a) Driving Score [%]. This is the best Driving Score of the user during the event.

b) Diff (gap) [sec]. This is an indication of the lap time’s difference and gap relatively to the best Driving Score.

c) Laps. This is the number of laps that the user completed in total during the event.

d) Best Lap [m]. This is the Lap Time of the best Driving Score lap. Τhe number in the () gives the information on which lap the user achieved it.

e) Distance [metres]. This is the covered distance of the fastest lap, of the session with the best Driving Score.

f) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap, of the session with the best Driving Score.

g) Max Speed [km/h]. This is the maximum logged speed of the fastest lap, of the session with the best Driving Score.

h) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session with the best Driving Score.

i) Lateral [g]. This the maximum sustained lateral grip of the session with the best Driving Score.

j) Braking [g]. This is the maximum sustained deceleration of the session with the best Driving Score.

 

5.3.2  “Ranking based on the Lap Time, with Driving Score” 

a) Best Lap [m]. This is the fastest logged lap of the event. Τhe number in the () gives the information on which lap the user achieved it.

b) Diff (gap) [sec]. This is an indication of the lap time’s difference and gap relatively to the best Lap Time.

c) Laps. This is the number of laps that the user completed in total during the event.

d) Driving Score [%]. This is the Driving Score of the fastest lap.

e) Distance [metres]. This is the covered distance of the fastest lap.

f) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap.

g) Max Speed [km/h]. This is the maximum logged speed of the fastest lap.

h) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session with the best Lap Time.

i) Lateral [g]. This the maximum sustained lateral grip of the session with the best Lap Time.

j) Braking [g]. This is the maximum sustained deceleration of the session with the best Lap Time.

 

5.3.3  “Ranking based on the Lap Time, without Driving Score” 

a) Best Lap [m]. This is the fastest logged lap of the event. Τhe number in the () gives the information on which lap the user achieved it.

b) Diff (gap) [sec]. This is an indication of the lap time’s difference and gap relatively to the best Lap Time.

c) Laps. This is the number of laps that the user completed in total during the event.

d) Distance [metres]. This is the covered distance of the fastest lap.

e) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap.

f) Max Speed [km/h]. This is the maximum logged speed of the fastest lap.

g) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session with the best Lap Time.

h) Lateral [g]. This the maximum sustained lateral grip of the session with the best Lap Time.

i) Braking [g]. This is the maximum sustained deceleration of the session with the best Lap Time.

 

5.3.4  “Alphabetical Overall Results, with Driving Score” 

a) Driving Score [%]. This is the best Driving Score of the user during the event.

b) Laps. This is the number of laps that the user completed in total during the event.

c) Best Lap [m]. This is the Lap Time of the best Driving Score lap. Τhe number in the () gives the information on which lap the user achieved it.

d) Distance [metres]. This is the covered distance of the fastest lap, of the session with the best Driving Score.

e) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap, of the session with the best Driving Score.

f) Max Speed [km/h]. This is the maximum logged speed of the fastest lap, of the session with the best Driving Score.

g) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session with the best Driving Score.

h) Lateral [g]. This the maximum sustained lateral grip of the session with the best Driving Score.

i) Braking [g]. This is the maximum sustained deceleration of the session with the best Driving Score.

 

5.3.5  “Alphabetical Overall Results, without Driving Score” 

a) Best Lap [m]. This is the fastest logged lap of the event. Τhe number in the () gives the information on which lap the user achieved it.

b) Laps. This is the number of laps that the user completed in total during the event.

c) Distance [metres]. This is the covered distance of the fastest lap.

d) Min Apex Speed [km/h]. This is the minimum logged speed of the fastest lap.

e) Max Speed [km/h]. This is the maximum logged speed of the fastest lap.

f) Acceleration [g]. This is the average of the best longitudinal accelerations, at the straight lines of the session with the best Lap Time.

g) Lateral [g]. This the maximum sustained lateral grip of the session with the best Lap Time.

h) Braking [g]. This is the maximum sustained deceleration of the session with the best Lap Time.

Note: The green background values are the best values from all the results. At “Lap Time” and “Distance” the best value is the smallest one. “

 

06. DRIVING SCORE ABBREVIATIONS

6.1 ASTERISK. VPR realised that the actual performance of the vehicle may not match the data collected during this session. [*] at Driving Score number.

6.2 LOW ACC. Insufficient GNSS accuracy. Only Lap time is provided.

6.3 INVALID. Τhe VPR algorithm realised that the actual performance of the vehicle does not match the data collected during this session. Only Lap time, Min apex speed, Max speed and Distance are provided.

6.4 RET. Retired from driving session. Only Lap time is provided.

6.5 DSQ. Disqualified from driving session. No results are provided.

6.6 TRACK LIMIT. Track limits violation. No results are provided.

07. DRIVING SCORE EXCEPTIONS

 “Vehicle Performance Rating” [VPR] is designed to provide a unique combination of data at a high level of accuracy. However the accuracy of Driving Score and Diff (Gap) may be compromised at some extent in the cases listed below:

7.1  Significantly different traction level on specific part of the track. Reasons might include a very bumpy section, a part of the course where there has been a liquid spill, a very wet spot while the rest of the route is dry, etc. [possibility for strict Driving Score].

7.2  Vehicles that due to their downforce, can produce significantly different lateral grip levels among turns of the specific track.

7.3  Motorcycles.

7.4  Insufficient GNSS accuracy. Most common reason for this is poor device installation but rarely it may also occur due to technical issues with the GNSS system.

7.5  Users who for any reason don’t feel comfortable pushing their vehicle close to its limits. Usually this can happen when they are not familiar with the track, or with the vehicle, or a combination of the two.

08. PROCEDURE

8.1  The “Symmetry” device must be installed properly and all LEDs must be in normal operating state (no red lights flashing).

8.2  The driving session starts when the vehicle exceeds 10km/h and ends when the vehicle’s speed is less than 10km/h  for more than 10seconds.

09. SOFTWARE VERSIONS

9.1 Current version: 1.6.1

Active Duration: 11/10/2020, 00:01am UTC time-now

Updates:

  • Longitudinal acceleration.
  • Low radius turns lateral acceleration.

9.2 Software update applies in every further VPR action. All existing Personal, Overall and VPR League results are updated accordingly.

9.3 Previous version: 1.5

Active duration: 4/3/2020 – 10/10/2020