The issues of counteracting gross violations in the field of road safety were relevant in peacetime and remain so in a special period. The article examines the experience of a new practice for Ukraine (initiated by military administrations in different regions of the country) on the forced alienation of vehicles under martial law for defense needs of persons who drove them in a state or with signs of alcohol, drugs or other intoxication. The purpose of the article is to analyze this experimental law enforcement practice for compliance of such measures with the requirements of the law. Within the stated purpose the task of this research is also to find out gaps of the current legislation and the description of an optimum order of realization of the specified type of measures of a legal mode of martial law. The study is based on the use of general scientific and special methods. Using the dialectical method and the method of critical analysis, it was established that the detection of signs of misconduct under parts 1-4 of Article 130 of the Code of Administrative Offenses of Ukraine (driving under the influence of alcohol) in martial law is the reason for choosing this vehicle alienation for the needs of the Armed Forces of Ukraine or other military formations. The legislation determining the bases, subjects and the order of implementation of compulsory alienation of the vehicles which are in private property, in the conditions of martial law for the needs of the state is analyzed. Given that the Law of Ukraine «On Transfer, Compulsory Expropriation or Seizure of Property in the Conditions of Martial Law or State of Emergency» contains certain exceptions to the decision on compulsory expropriation of property in areas where hostilities are taking place, it is stated that this measure of martial law can be made in the usual and simplified order. The article, taking into account the legal requirements, presents the main stages of both procedures of forced alienation of vehicles.