....maybe they are going to use it all for border patrols....(around cities...?)
Residents of the Soviet Union after 1932 were issued internal passports.
Wikipedia: “. . .its purpose declared to improve the registration of population and “relieve” major industrial cities and other sensitive localities of “hiding kulaks and dangerous political elements” and those “not engaged in labor of social usefulness”. The “passportization” process developed gradually involving factories, large, medium and small cities, settlements and rural areas, and finally became universal by the mid-1970s. Internal passports were used in the Soviet Union for identification of persons for various purposes. In particular, passports were used to control and monitor the place of residence by means of the propiska, a regulation designed to control the population's internal movement by binding a person to his or her permanent place of residence. . .”