Psychiatry, the law and death on the roads

Harvey Gordon is a consultant forensic psychiatrist at Littlemore Mental Health Centre (Sandford Road, Littlemore, Oxon OX4 4XN, UK. E-mail: Harvey.gordon{at}oxmhc-tr.nhs.uk) and an honorary senior lecturer in forensic psychiatry at the University of Oxford. He has also worked at Broadmoor Hospital and at the Maudsley and Bethlem Royal Hospitals.

	Abstract

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
The motor vehicle on the road has a history of only just over 100 years. It is a major form of personal and public transport, but is also associated with hazards and risks. Many more people are killed on the roads each year in Britain than are the victims of homicide. General and forensic pyschiatric evaluation of offenders charged with or convicted of motoring offences is, however, infrequent, despite the presence of mental health problems in some of them. I describe psychiatric, criminological and legal factors associated with driving of motor vehicles, as many psychiatric patients have driving licences and have access to a vehicle or, indeed, may decide to drive unlicensed.

	Mental disorder and road traffic accidents

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
Most road traffic accidents are caused by human error (Cremona, 1986) with additional factors, including the road conditions, climate and the road-worthiness of the vehicle. Driving behaviour is highly complex and human error may comprise unintended actions as well as deliberate violation of traffic law (Reason et al, 1990). Medical conditions of drivers, with the exception of disorders related to alcohol, account for less than 1% of road traffic accidents in which injury is involved (Raffle, 1985).

Earlier studies indicated that those with psychotic illnesses showed up to twice the rate of road traffic accidents than did a control group (Waller, 1965). More recent reviews have revealed no excess (Armstrong & Whitlock, 1980; Silverstone, 1988). The level of risk to others may be raised where the content of delusions or hallucinations incorporates other road users (Driver and Vehicle Licensing Agency, 2001), although the degree of increase has not been quantified. Where psychotic symptoms are active, risk is probably higher and drivers are usually safer when stabilised on psychotropic medication (Harris, 2000). These findings are consistent with the general notion that there is a modest elevated risk associated with schizophrenia when active symptoms are present.

In the case of bipolar affective disorder, it is intuitive that patients in a hypomanic episode may drive rapidly (Cremona, 1986), but supporting evidence is unavailable (Silverstone, 1988). Patients in a depressed episode with psychomotor retardation may show impaired concentration (Cremona, 1986) and increased suicidality while driving (Isherwood et al, 1982; Silverstone, 1988).

Various studies have shown an increased accident rate for drivers with dementia (Kolowski & Rossiter, 2000), borderline cognitive impairment (Marottoli et al, 1994) and neurological impairment (McKenna, 1998).

Alcohol consumption has long been identified as one of the most important factors in road traffic accidents (Shinar, 1978; Del Rio et al, 2001). Bierness (1993) found that alcohol interacted with underlying personality factors such as hostility and aggression, rendering some drivers more vulnerable to road traffic accidents. An ‘antisocial lifestyle’ comprises a range of related behaviours, including violent and non-violent offences, substance misuse, sexual promiscuity and reckless driving (Carter, 2003). Early age of onset of drink-driving has been found to be associated with mental illness and violent criminality (Rasanen et al, 1999). Those convicted of drink-driving have been found to be more likely also to misuse alcohol or be alcohol dependent, as well as to have comorbid disorders such as misuse of other drugs, depressive illness and post-traumatic stress disorder (Lapham et al, 2001).

The 1990s in Britain saw an increase in the number of fatal road traffic accidents caused by drivers under the influence of drugs other than alcohol. Cannabis was the drug most frequently found in the bloodstream. The presence of drugs was highest among fatalities who had been unemployed, and it was associated with male drivers under 40 years of age and female drivers over 40; the females were more likely to have been driving under the influence of prescribed drugs rather than drugs of misuse (Tunbridge et al, 2001). People taking anxiolytics and hypnotics are known to be at heightened risk of road traffic accidents (Barbone et al, 1998). The risk of being involved in an accident may also be elevated in people who have been affected by adverse life events such as recent separation or divorce (McMurray, 1970).

	Road rage

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
A much quoted study is that by Tillman & Hobbs (1949), which found that a ‘high-accident’ group of taxi drivers showed marked intolerance of and aggression towards authority. These drivers manifested elements of conduct disorder, psychological maladjustment and an irresponsible approach to driving and were more likely to have a record of criminal convictions. Other early studies confirmed that a car can be used by those so disposed as a means of expressing aggression (Whitlock, 1971). The term road rage, although coined only in the late 1980s, is not therefore a new phenomenon. Fong et al(2001), in a British study based in inner London, found that 53% of drivers surveyed had been victims of road rage in the preceding 12 months – considerably less than the figure of 90% found by the Automobile Association in the mid-1990s (Joint, 1995). Men tend to commit dangerous traffic violations and behave aggressively on the roads more frequently than women (Aberg & Rimmo, 1998), and younger, less experienced drivers have the highest risk of involvement in fatal crashes (Moffatt, 2002). Many road-rage incidents are limited to an angry expression or altercation, but some result in serious violence, sometimes fatal, especially in the USA, where the driver may have a gun in the car (Miller et al, 2002). No figures are available for the number of serious injuries or fatalities from episodes of road rage in Britain.

Although the immediate trigger for a road-rage incident may occur during driving, the driver may already be aroused before getting into the car. For example, a Manchester man, enraged after seeing his football team defeated, lost control of his car while driving dangerously, killing both himself and his 12-year-old son (Britten, 2003). Fong et al(2001) found that road rage was associated with higher levels of aggression as well as with a history of substance misuse and abnormal personality traits. Hennessy & Wiesenthal (2002) add the personality variable of vengefulness as a factor in serious violence on the road. Revenge is generally much understudied and underplayed as a component in violence, and is perhaps the most primitive and basic impulse of all. Aggressive driving behaviour is a complex phenomenon with a range of psychological causes (Lajunen & Parker, 2001). It is also a cross-cultural problem, occurring in many different countries (Parker et al, 2002). Box 1 shows the likely profile of a road-rage driver.

Box 1 The likely profile of a road-rage driver Male Young: teenage or early 20s Single Unemployed or in low-status employment A history of substance misuse, aggressive behaviour and criminality Little driving experience

 

	Car crime

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
As property offences constitute the most common type of criminality (Gunn & Taylor, 1993), the theft of a car or of property from a vehicle is a most common form of theft (Corbett, 2003). About 400000 cars per year were stolen in Britain in the late 1990s (Knowles, 2003). Thefts of cars may be either temporary, for the purpose of joyriding, or permanent, in which case professional car thieves are usually involved. Drivers of stolen cars are more likely to be involved in a car crash (Knowles, 2003). Car theft is often the precursor to a criminal career, beginning usually in the mid-teenage years, but occasionally as early as 10 years of age (Corbett, 2003). No figures are available for the frequency of car theft by patients with mental disorders.

Another common car crime is driving without a valid driving licence, which is also associated with other forms of traffic offending and raised crash risk (de Young et al, 1997). Driving without motor insurance is also a crime. As people are required to disclose their medical history in applying for insurance and some insurance companies refuse to insure drivers with mental disorders, some may well be driving without insurance (Brown, 1993).

The early paper by Tillmann & Hobbs (1949) pointed to an association between risky driving and an underlying propensity towards antisocial behaviour. Subsequent studies have tended to reach similar conclusions (Mayer & Treat, 1977). The criminal histories of certain types of traffic offender are very similar to those of mainstream criminal offenders, especially in the case of drivers who have been disqualified and, to a lesser extent, of those convicted of dangerous driving (Rose, 2000).

Finally, it is worth noting that a car may be used in the commission of crimes such as burglary, rape, drive-by shooting and terrorist attack (car bombing). The use of a motor vehicle as a weapon or facilitator of crime has to date been overlooked in forensic psychiatric studies of mentally disordered offenders.

	Suicide and homicide on the roads

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
Psychoanalytic perspectives may have influenced earlier studies that postulated unconscious self-destructive impulses, sometimes together with alcohol misuse, as underlying causes of some fatal automobile accidents (Selzer & Payne, 1962). A study in Finland reported that 2.6% of all driver fatalities had been officially classified as suicides, whereas the probable true figure was 5.9% (Ohberg et al, 1997). This estimate was higher than the 2.7% published in an earlier British study (Jenkins & Sainsbury, 1980), which examined the claim that single-vehicle accidents are a reflection of suicidality. However, not all studies of ‘driver suicides’ have shown a history of suicidal ideation, suggesting that many may be impulsive acts in response to acute distress rather than well-established suicidality. The literature on the use of motor vehicles in suicide has tended to focus on asphyxiation by car exhaust gas rather than death by deliberately dangerous driving (Cantor, 2000).

Suicide by dangerous driving raises the risks not only to the driver but also to any passengers, pedestrians and people in other vehicles. In Ohberg et al’s study (1997), in almost 4% of ‘suicide crashes’, someone other than the driver was killed. MacDonald (1964) stated that death by automobile offered special opportunity for concealment of suicide and homicide, and he found that homicidal impulses were relevant in the genesis of the suicide in several cases. Ohberg et al(1997) found several factors that were common to many driver suicides: the drivers were young men driving alone, the accident was a head-on collision with another vehicle of much heavier weight, the driver had experienced stressful life events and had a mental disorder, including long-term alcohol misuse.

As yet there is no full forensic psychiatric profile of individuals who drive dangerously with the intention of killing themselves. None of the studies of suicide by motor vehicle has included the drivers’ criminal record or history of antisocial behaviour. However, MacDonald’s 1964 study of suicide and homicide by motor vehicle carried out in Colorado, USA, did report on the mental state of the drivers (MacDonald, 1964). The results of this part of the study are summarised in Table 1. As an example, Macdonald’s article noted the case of a 32-year-old woman with schizophrenia who, while driving with her husband and five children, deliberately crashed into the rear of another car at 80 miles per hour, apparently because voices had told her to do it so that the family could all be born again. I also know of patients convicted of manslaughter using the motor vehicle as a weapon who have been diagnosed with schizophrenia and admitted to high-security hospitals or medium secure units. Suicide by drivers may allow for self-destructive urges to be enacted in a violent manner, enabling the concomitant discharge of uncontainable anger.

	Dangerous driving and the law

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
Legislation regarding driving can be traced back to the Romans, who introduced laws to try to reduce the number of collisions between drunken charioteers (Whitlock, 1971). Motor vehicle traffic law in Britain initially reflected the problems resulting from the need for potentially nervous horse-drawn transport to share the road with the noisy motor car. It was later influenced by debates as to whether cars are inherently dangerous or whether the danger arises from the ferocity of those who drive them (Forbes, 1972).

Table 2 shows the evolution of UK road traffic legislation since the early 1800s. Throughout the 20th century, popular opinion seemed to reflect the view that the driving offender, however dangerous, was not seen as a ‘criminal’ (Fitzgerald, 1969), and sentences were more lenient even if people were killed. Recently, however, the Traffic Penalty Review (Home Office, 2000) has resulted in an increase in the length of sentences for more dangerous driving offences. The main offences related to dangerous driving that are covered by the Road Traffic Act 1991 are shown in Table 3.

Occasionally, it can be shown that a driver deliberately caused the death of one or more victims, in which case a charge of murder or manslaughter may be possible. In most cases, there is no intent to harm or kill and what we are seeing is a driver’s irresponsibility, carelessness and, at times, lack of concern for the welfare of others. Some road traffic accidents are caused by temporary driver distraction, including the effects of fatigue. Whether or not a death occurs may be arbitrary and it has been argued that the law should reflect the commission of dangerous driving, rather than its outcome or consequences. However, the sanctity of human life is such that most legislations do have separate offences reflecting whether or not a death has occurred. Some have argued that victims of road traffic accidents who have sustained serious, chronically incapacitating injuries are also not adequately justly dealt with by current legislation, injury from a road traffic accident being regarded as one of the most common precipitants of post-traumatic stress disorder. Ultimately, it is for the court to determine the culpability of a driving offender, taking account of the level of intent, compliance with traffic law, including drink- or drug-driving, whether the required standard of driving was evident and whether or not a death has occurred. Where mental disorder is present it is necessary for a psychiatrist to evaluate its nature and to what extent it may have affected the driving, taking account of life events, mood, cognition, psychosis, personality factors and the effects of medication and treatment. Readers are referred for further information on the law in regard to dangerous driving to Smith (2002) and to the Department for Transport (2003).

	Concluding remarks

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 
On a global level, death and injury from road traffic accidents are major parameters of public risk and ill-health (Pless, 2004). In Britain, although the number of fatalities on the roads has reduced to about 50% of the level 40 years ago, road deaths are some five or six times more common than deaths by murder and manslaughter. Considerable potential exists for prevention of such mortality and associated morbidity, and the World Health Organization has declared road safety to be its focus for 2004 (World Health Organization & World Bank, 2004).

Although almost every driver is at some time involved in a minor road accident, it is emerging that those involved in more serious crashes are very likely to be either mainstream criminal offenders or ordinary people (with no mental disorder or significant criminal record) who just drive dangerously.

Psychiatrists and related mental health professionals meet many patients who can drive. Some of these individuals will be at risk of killing or injuring themselves or others while behind the wheel, intentionally or through carelessness or recklessness. By paying greater attention to patients’ use of motor vehicles and their attitudes to them, mental health professionals might contribute to the prevention of injuries and deaths. It might even be appropriate to warn certain patients of the risks that they present. Psychiatrists must also be aware that an individual accused of a crime related to driving might have acted under the influence of a mental disorder.

The car undoubtedly provides numerous benefits in modern society, but psychiatric prevention of its misuse as a weapon is in need of further research.

	MCQs

Top Abstract Mental disorder and road... Road rage Car crime Suicide and homicide on... Dangerous driving and the... Concluding remarks MCQs References

 

1. Motorised vehicles have been available since approximately:
   
   1. 1800
      
   2. 1900
      
   3. 1700
      
   4. 1820
      
   5. 1650.
      
   
   
2. Mental disorder and road traffic accidents may be elevated in cases of:
   
   1. active psychosis
      
   2. well-controlled psychosis
      
   3. hypomania
      
   4. conduct disorder
      
   5. neurological impairment.
      
   
   
3. Driver suicides:
   
   1. are the most common method of suicide
      
   2. account for more than 10% of all driver fatalities
      
   3. are sometimes associated with homicidal ideation
      
   4. can always be associated with well-established suicidality
      
   5. are more common in women than in men.
      
   
   
4. As regards car crime:
   
   1. thefts of cars are uncommon
      
   2. road traffic accidents are more commonly caused by drivers in stolen cars
      
   3. driving without insurance is not illegal
      
   4. car crime may be associated with a criminal lifestyle
      
   5. cars may be used in a range of crimes.
      
   
   
5. As regards the law and dangerous driving:
   
   1. causing death by dangerous driving is legally regarded as murder
      
   2. most cases of risky driving result in prosecution
      
   3. recently, penalties for dangerous driving have been reduced
      
   4. the 1991 Road Traffic Act places more emphasis on the mental state of the driver than on the standard of driving
      
   5. psychiatrists have no role to play in prevention of road traffic accidents caused by their patients.
      
   
   

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