The Constitution provides for free movement within the country and across its borders, and the Govt. generally respects these rights. The Govt. requires citizens to obtain exit visas for foreign travel, or emigration, but grants these permits routinely. All citizens have a right to a passport, and the Govt. does not restrict this right. The new passports serve as both internal identity cards and, when properly certified, as external passports. Every citizen must carry such a document when traveling inside or outside the country. Police occasionally confiscate these documents, severely restricting a person's right to travel. Movement within the country of foreigners with valid visas generally is unrestricted. However, visitors require special permission to travel to certain areas, such as Termez, on the Afghan border.
Source: U.S. Department of State.