We traveled by car from Kazakhstan to Uzbekistan. We were amazed by the queue. We found out that people are standing in line for days to get to the border. There are helpers, for money they offer to drive to the Kazakh checkpoint without waiting in line. We used their service, may everyone who was waiting in line forgive us, but they let us through out of line. As a result, the Kazakh side passed quickly. And then... the queue to get to the Uzbek side. Waiting for about an hour, then a thorough inspection, unclear registration (go there, go here, pay there, put a mark there), and the border is passed.