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Driving Safety Tools

Stopping distance calculations and a Journey Risk Assessment (JRA) scorer โ€” useful for IVMS programmes, defensive-driving classes and pre-trip briefings.

14Stopping Distance Calculator

Stopping distance = thinking distance + braking distance. d_b = vยฒ / (2ยทgยท(ฮผ + sin ฮธ)) where ฮผ is the friction coefficient for the surface and ฮธ the slope. Heavy vehicles use a typical effective ฮผ of about 75% of a light vehicle on the same surface.

2080 km/h160
Trained driver: 1.0 s ยท Average: 1.5 s ยท Distracted/fatigued: 2.5 s+.

Result

โ€” m total
โ€”
Thinking distanceโ€”
Braking distanceโ€”
Effective ฮผโ€”
Equivalent toโ€”

15Journey Risk Assessment

Generates a structured journey-risk score from route, time-of-day, weather and driver factors. Includes mitigations like rest stops, alternate route or postponement.

Risk score

โ€” / 100
โ€”

โ€”

Mitigations

    24Convoy Spacing & 2-Second Rule

    Compute the minimum following distance for the speed and conditions, total convoy length, and the radio call-time gap between vehicles. Adjust the time-gap rule (2 s dry, 3 s wet, 4 s heavy/tow) per IOGP Land Transport Safety guidance.

    2080 km/h120

    Spacing & convoy length

    โ€” m gap to vehicle ahead
    โ€”
    Time-gap appliedโ€”
    Convoy total lengthโ€”
    Time across the convoyโ€”
    Recommended radio checkโ€”
    For training purposes only. Journey risk thresholds and authorisation rules vary by company; defer to your operator's road-transport management standard.