Why BAC enforcement on the road is critical to reducing road accidents


Road traffic accidents are a major health problem globally. Statistics from WHO in June 2022 indicates that approximately 1.3 million people die each year as a result of road traffic crashes. About 93% of the fatalities on the roads occur in low- and middle-income countries and at the same time, road traffic crashes cost most countries 3% of their gross domestic product.

Ghana is not left out of the doldrums of road traffic accidents. The country is touted to be among the African countries grappling with road traffic crashes. As shown by the US Centers for Disease Control and Prevention, fatal road injury is one of the top 10 causes of death in Ghana. It has been estimated by the Building and Road Research Institute of the Council for Scientific and Industrial Research of Ghana (BRRI) that the nation recorded 302,712 crashes involving 477,609 vehicles between 1991 and 2020. In 2016, the World Bank reported that Ghana lost 8.2% of its GDP to road traffic crashes. A recent data from the National Road Safety posits that road crash incidents during the first five months of 2022 in Ghana reduced by 4.67%. In spite of the good news, it should be mentioned that about 1,140 persons died during the same period in 2022.

Causes of Road Accidents

Several factors account for road crash accidents but one of the leading causes in Ghana is drunk-driving or driving under the influence of alcohol. However, studies have shown that accidents and deaths occurring from drunk driving depends on the content of alcohol in a driver’s blood which is generally referred to as blood alcohol concentration (BAC). BAC is the measurement of the level of alcohol in the blood and is most commonly used to assess the degree of alcohol intoxication. BAC is expressed as the weight of ethanol, in grams, in 100 milliliters of blood, or 210 liters of breath. BAC can be measured in by breath, blood, or urine tests. The effects are often observed when it comes to the judgement of moving objects and the processing of different information at the same time. It can affect other parameters for a long time including simple reaction time, vigilance, visual searchers and logical reasoning.

Why BAC Enforcement on the Road is Critical

Research has shown that the risk of a fatal accident occurring under the influence of alcohol increases significantly at 0.050mg/ml and above.  At this level, all drivers are said to be impaired regarding driving performance. As such most countries across the globe have revised their BAC limit from 0.08% to 0.050% due to the little increase in crash risk at 0.05 BAC limit.

The behavioral consequences associated with alcohol intoxication include impaired driving, acts of aggression and violence towards self and others. These attendant behavioral impairments are a result of several factors including the blood alcohol concentration (BAC) and the rate of alcohol metabolism. Thus, alcohol intoxication interacts with the aforementioned factors to increase or decrease the behavioral and therapeutic effect. Consequently, the risk of a fatal car accident increases exponentially with a driver’s BAC as a result of the diminished capacity of drivers while intoxicated to operate motor vehicles and the increased propensity for risk-taking behaviour.

Intoxicated drivers are significantly more likely to speed, to be improperly seat-belted and to drive the striking vehicle.  The greater the BAC, the greater the average speed of the driver and the greater the severity of the accident. The effect of alcohol on human skills has been reported even at the lowest measurable level suggesting that thereafter increasing in an approximately exponential manner. It has been proved that alcohol intoxication affects drivers’ ability to operate a vehicle at a BAC level 0.035%, it decreases operating accuracy at 0.06% and impairs behaviour such as steering and braking with the range of 0.05% and 0.10%. In other words, there is unequivocal evidence that alcohol significantly impairs driving performance, as demonstrated through laboratory, simulator, and driving studies.

What needs to be done

Available data on the current level of alcohol-impaired driving/riding road crashes is very high in Ghana given that Ghana’s BAC limit is high by international standards. Accordingly, studies recommend that to reduce drink-driving-related traffic crashes and fatalities in Ghana, there should be a reduction in the current national BAC limit. Damsere-Derry et al. (2014) recommends that

In   order   to   reduce   drink-driving   prevalence   and   its   attendant  road  traffic  crashes,  it  is  recommended  that  the  country  should  scale  up  its  randomized  roadside  breath-testing   program;   define   standard   drink   quantities   and   disseminate   this   information   to   the   populace   through   intensive  media  education;  increase  the  minimum  legal  drinking  age  to  21  years;  and  reduce  the  legal  BAC  limit  for  youth  to  0.05%,  from  the  current  legal  limit  of  0.08%.    The prevailing legal BAC of 0.08% is on the high side; due to the apparent impairment at the 0.08% level, the country should consider reducing this level over the long term”


It should be emphasized however that efforts are being made to reduce the menace of drunk-driving in the country. As part of government measure to reduce road crashes occasioned by drunk behaviour or BAC, the Ministry of Transport (MOT) has initiated a process of reviewing the limit downwards and this measure is supported by the scientific evidence and for this reason, we at CUTS endorses the initiatives by the Government.

The Writer is with CUTS International, Accra. For more information visit (www.cuts-accra.org) or email: [email protected]


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