A research has been carried out to establish the current situation of presence of alcohol in traffic on Croatian roads, and to compare it to the situation three years ago, more precisely in the end of 1996). The research has established that the average portion of intoxicated drivers on Croatian roads is 4.4 per cent, and that the average concentration of alcohol in such drivers is 1.13 per thousand, which is higher than the critical level of intoxication 1.1 per thousand. The portion of intoxicated drivers exceeding the critical concentration is 43.2 per cent. When compared to the situation three years ago, the following should be established for the current situation: The portion of intoxicated has decreased in these three years for one third, or more precisely for 37 per cent; The average concentration of alcohol in intoxicated drivers is bigger when compared with the situation three years ago for 12 per cent; (from 1.01 per thousand to 1.13 per thousand); The portion of intoxicated drivers exceeding the critical level of 1.1 per thousand has increased, when compared to the situation three years ago, for 35 per cent.