Driver behaviour: harsh accel/brake = +18% fuel
Driver behaviour directly affects fuel consumption, tyre wear, engine life and accident risk. Same truck, same lane, same load — but fuel-consumption gap between two drivers can reach 18% (DEKRA Driver Performance Study 2024).
Industry case: 100 trucks × 30 L/100 km × 12,000 km/mo × 18% driver delta × €0.63/L = €4,000+/month from this single vector.
Composite driver score
Lognari combines OBD2 + telematics across 6 signals:
| Signal | Threshold | Weight |
|---|---|---|
| Harsh accel (1G+) | < 3/100 km | 20% |
| Hard brake (-1G+) | < 4/100 km | 25% |
| Over-rev (sustained RPM > 1,800) | < 5% of trip | 20% |
| Over-speed (limit + 10%) | < 2% of trip | 15% |
| Idle % | < 8% of trip | 10% |
| Night driving | lane-specific | 10% |
Monthly score: 0–100. EU average: 67; pilot fleets reach 88 after the program.
Impact by fleet size
| Fleet | Annual fuel savings | Maintenance savings | Accidents prevented |
|---|---|---|---|
| 100 trucks | €48K | €15K | 2-3 cases |
| 300 trucks | €144K | €45K | 6-9 cases |
| 1,000 trucks | €480K | €150K | 20+ cases + insurance discount |
Pilot — 110-truck distribution fleet
At pilot start: average score 64. Over a 6-month program:
- Score visible to everyone (ops-centre panel + mobile)
- Top 20% drivers receive a monthly €150–€280 bonus
- “Most improved” category (extra for 5 most-progressed drivers)
- Coaching sessions for low-score drivers
Result:
- Average score 64 → 89
- Monthly fuel savings €5,200
- Annual accident count 7 → 2
Side effect: insurance premium
DEKRA + Aon reports: when fleet average driver score hits 80+, insurance premiums drop 10–15%. Two pilot fleets renegotiated successfully on this basis.
What’s next
If your fuel-consumption gap between drivers is 12%+, you have behaviour variance. A 30-day pilot delivers a concrete score table.
Reach out via the contact section — reply within one business day.
