What does the driver safety score calculator show?
Many fleets, especially oil and gas contractors that run an in-vehicle monitoring system (IVMS), report a monthly list of drivers in red, amber and green. Each color comes from a score that relates driving events to the distance driven, so a driver who drives more is not punished for it.
This calculator uses the two formulas of the RAG Report in the Safee user guide. Paste one month of events per driver and you get:
- Drivers: each driver's score and color, the term that makes up most of the score and the single change that would turn the driver green.
- Fleet: a distance-weighted fleet score, the split of drivers by color, the violation type behind most points and the five drivers to coach first.
- Coaching: a plan that gives each driver the action your policy sets for the color, with a review date.
What inputs do you need?
| Input | Where to find it | Tip |
|---|---|---|
| Distance per driver | Trip or driver reports from your tracking system | Use the distance the driver drove, not the vehicle's, when drivers share vehicles. |
| Harsh acceleration and braking events | Device events in tracking reports, such as the Safee Harsh Break Report | Keep the same device thresholds all month; a changed threshold changes the counts. |
| Overspeed time in seconds, overspeed events | Overspeed reports; the Safee RAG Report bases overspeed on the speed limit set for each vehicle | Formula A needs the time over the limit, Formula B the number of events. |
| Time without seat belt in seconds | Seat-belt alarms, where a seat-belt sensor is fitted | Leave the check box clear if your vehicles have no seat-belt sensor. |
| Color limits, minimum distance, coaching actions | Your HSE or driver safety policy | Agree them once and keep them for the year. |
How is the driver safety score calculated?
Formula A: sum of rates per distance (lower is better)
Standard colors in the guide: green under 1, amber from 1 to under 3, red 3 or more. The guide's SP2000 RAG report uses green 1 or less, amber over 1 up to 3 and red over 3; pick it in the Color limits list.
Formula B: score out of 100 (higher is better)
Colors in the guide: green 80 to 100, amber 66 to under 80, red 66 or less. Because the formula starts at 65, a driver with many events in a short distance ends close to 65 rather than at zero.
Sources and assumptions
- Both formulas and the default limits are from the Safee user guide v6.1.0, section 6.2.3 "RAG Report"; the SP2000 limits are from section 6.1.17. Distances are in kilometers.
- Durations in seconds: the guide does not name the unit of the durations. It describes the speed term as "seconds speed per 10 km", so the calculator reads every duration, overspeed and seat belt, in seconds.
- Formula B capped at 100: the formula can exceed 100 when the distance per violation point is very large. The guide gives 100 as the top of the green range and sets 100 for no violations, so the calculator caps the score at 100.
- The guide's Formula B ranges meet at 66 (amber from 66, red 66 or less). The calculator applies the red rule at 66.
- Violations you clear count as zero, as the guide states for the Safee report.
Method reviewed 21 October 2026 against the Safee user guide v6.1.0 and the Arabic guide v6.3.3, which gives the same formulas. Event definitions follow IVMS practice described by IOGP's guide to in-vehicle monitoring programs.
Worked example: driver D-104, Formula A
The example drivers are made up. D-104 drove 3,850 km with 6 harsh accelerations, 11 harsh braking events, 180 seconds over the speed limit and 45 seconds without a seat belt.
- Speed: 180 ÷ (10 × 3,850) × 100 = 0.47. Seat belt: 45 ÷ (10 × 3,850) × 1000 = 1.17.
- Acceleration: 6 ÷ 3,850 × 100 = 0.16. Braking: 11 ÷ 3,850 × 100 = 0.29.
- Total: 2.08, which is amber (1 to under 3). The seat belt makes up 56% of the score.
- To turn green the total must fall under 1. The other three terms add up to 0.91, so the seat-belt term must stay under 0.09: 3 seconds or less without a seat belt in the month.
- With Formula B, the same driver has 0.5 × 45 + 1.6 × 4 + 0.25 × 11 = 31.65 violation points: (3,850 ÷ 31.65) ÷ 100 + 65 = 66.2, amber.
How do you read the results?
- Color first, score second: the color is what your policy acts on. Two red drivers can have very different scores; the table sorts the worst first.
- Main contributor: the term with the largest share of the score. It tells you what to talk about with the driver.
- To turn green: the largest number of events or seconds of the main contributor that still gives green, with everything else unchanged. "Needs more than one area" means that even zero of it would not be enough.
- Fleet score: weighted by distance, so a driver who drove little does not move it much. Read it month on month.
How do you coach drivers from a RAG list?
- Talk about one thing: use the main contributor. A driver hears "your seat-belt time" better than a score.
- Agree a review date: recalculate next month and check whether the driver moved up a color.
- Look for patterns: if one violation type leads across the fleet, cover it in a toolbox talk. The Driver Safety Quiz with Certificate and the Journey Management Plan Template help.
- Show the cost: speeding and accidents have a price. See the Speeding Fines Cost Calculator and the Road Accident Cost Calculator, and track fleet-level safety with the Fleet KPI Calculator.
Assumptions and limits
The score is only as good as the events behind it. Event thresholds, device type, speed limits set per vehicle and seat-belt sensors all change the counts, so compare drivers measured the same way. The color limits are yours to set; the defaults are the guide's standard values, not a legal requirement. Scores over a short distance swing widely, which is why drivers under your minimum distance are not scored. The calculator does not cover night driving, fatigue or four-wheel-drive use, which some IVMS programs also score. Use the result to start a coaching conversation, not as the only basis for discipline.