Mental illness and road safety

Psychiatric disorders, either due to their psychopathology or the drug treatments required, may lead to changes in perception, information processing and integration, and psychomotor activity which may disturb and/or interfere with the ability to drive safely.

This study assesses competence to drive in a sample of psychiatric outpatients, with a driver's license, who drove regularly. This ability was assessed with the accredited LNDETER 100 battery, an electronic assessment unit measurement, in different clinical situations.

Only 24 of the 120 patients passed the four tests required to obtain or renew a driver's license, and 80% failed in at least one of the required tests. None of the patients studied had notified the traffic authorities or the examination centers that they had a psychiatric condition that could affect safe driving. No patient stopped driving, although 10% of them admitted that their ability to drive was somewhat deteriorated.

Psychiatric patients with altered psychomotor performance should be a concern for psychiatrists and general practitioners regarding their competence to drive vehicles. Clinical, ethical and legal aspects of our findings are discussed.