The total number of specimens analysed for alcohol in blood, urine and breath and for drugs in blood and urine in 2017 totalled 10,482. This was a significant increase in the number of analyses compared with 2016. Alcohol remains the most prevalent intoxicant posing a danger on the roads and the mean alcohol level in blood specimens analysed in 2017 was 156mg/ml and in urine it was 181mg/100ml whilst in breath it was 45μg/100ml. Cannabis and benzodiazepine classes of drugs were the next most common intoxicants found on analysis. The younger male drivers continued to be the group in whom intoxicants were most often detected on analysis.