The current state of road safety in Ukraine cannot meet the demands of society. Daily reports of the state of traffic offences with serious consequences call for adequate measures to prevent them. There are several reasons for such offences, but one of the most important is the driving of vehicles by persons under the influence of drugs or alcohol. That’s why the article is devoted to the study of separate aspects of functioning of different technical devices, which helps finding drunk and drug addicted people and are made not only in Ukraine, but also imported. Authors analyzed modern methods and ways to discover and identify particular concentration of alcohol in the human body. Likewise, modern opportunities to carry out testing of the person on its biological liquids, like blood, urine, saliva, sweat, tear fluid, and in the air person exhales were considered.
 The different types of sensors equipped with modern breathalyzers have been studied and analyzed. Attention 
 is drawn to the need for regular checks on the quality and accuracy of such devices, as well as compliance with the algorithm provided for in the instructions for their calibration.
 Emphasis is placed on the expediency, taking into account the best practices of foreign analogues of the development of new domestic technical means of detection and quantification of the concentration of alcohol in the human body.
 The results of study which made showed the amount of problems, to which police can face during conduction driver examinations to determine the state of intoxication.
 Author’s suggestions and recommendations for improving the technical support of police officers in order to improve the process of establishing the facts of the driver in a state of intoxication in the field.