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The Driver Risk Index™ is the most scientifically validated tool for assessing behavioural and situational risk

A pioneering method of
driver profiling

Developed by Cranfield University, the Driver Risk Index is a psychometric assessment which identifies driver risks.

The assessment profiles a driver on a number of critical behavioural factors including: aggression, work related risk, driving excitement, ineffective coping strategies and susceptibility to fatigue.


A global solution

You can choose the most appropriate Driver Risk Index™ variant for your driver population. Click on a variant for further information.


The Driver Risk Index™ is translated in over 30 languages worldwide.

Our international clients range from those seeking a solution in one country, through to major multinational organisations seeking global implementation.


Driver behaviour vs Driver skill:
What’s the difference?

Driver skill - the ability to operate a vehicle based on knowledge, perceptual and cognitive abilities to enable you to manoeuvre through the traffic environment.

Driver behaviour - the way in which the driver chooses to apply their skills in any given moment — e.g. speeding, tailgating, driving tired… Such actions are all behavioural choices.

The Driver Risk Index™, developed at


Based on over 30 years of academic research into the psychology of driver behaviour

The only accurate commercially available measure of driver behaviour

Shown by studies to be predictive of driving styles and chances of being involved in a crash

The use of science in the development of the Driver Risk Index™


The Driver Risk Index is a psychometric assessment which means that it has been constructed using statistical techniques. The data used to compare DRI results against each other was provided by thousands of drivers responding to a series of questions. These responses have been distilled down and organised into ‘scales’, or categories, to measure several aspects of driver behaviour.


When an individual driver completes the Driver Risk Index their responses are used to calculate behavioural risk with reference to how they scored relative to a benchmark or ‘norm group’. Their individual responses are compared with those of a large group made up of similar drivers. It is then possible to work out whether the drivers score is low, average or higher than average on each scale.


A reliable instrument is one that measures human characteristics consistently across time, individuals, and situations. Using statistical techniques, the Driver Risk Index has been checked for consistency across repeated assessments of the same individual over time. The scores at different times are highly correlated and therefore the way an individual scores at Time 1 is predictive of the way they score at Time 2.


A valid measure is one that measures what it is intended to measure and can be assessed statistically. The Driver Risk Index has been correlated with other measures of driver behaviour collected via field trials, driving simulators and self-report instruments. The Driver Risk Index scales have also been validated by correlating scores with driving offences and crash involvement.

The science behind the Driver Risk Index™ — simplified

John repeatedly gets annoyed when running late on a delivery...

Neither he nor his employer are aware that John has a high propensity to use driving as a means of "letting off steam" and teaching other road users a lesson!


Based on his DRI assessment, John is given a personalised programme of e-learning and coaching to mitigate these angry driving tendencies.

The programme centres on influencing the perceptions that John has about other road users and his personal needs to feel in control with the use of self-reflective techniques.

What scientific evidence supports the Driver Risk Index™?

The Driver Risk Index has been involved in a broad variety of research which has resulted in its being referenced in over 75 academic research papers. These papers are subjected to close scrutiny by panels of academic experts prior to publication, in a process called “peer reviewing”. This ensures that the methodology, analysis and conclusions of the papers stand up to the most rigorous of scrutiny by experts.


The Driver Risk Index™ has also been the subject of case study analysis by a number of our major long-standing clients, in which the DRI profiles of the fleet have been analysed in relation to claims data, telematics outputs and other variables. Please see the case studies section for further details.

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