When placing goods under the customs procedure of customs transit, the customs authority of departure sets the time period during which the goods must be delivered from the customs authority of departure to the customs authority of destination (hereinafter referred to as the customs transit period).
In respect of goods transported by rail, the customs transit period is set at the rate of two thousand kilometers per month, but not less than seven calendar days.
With respect to goods transported (transported) by other means of transport, the term of customs transit is established in accordance with the usual period of transportation (transportation) of goods based on the type of transport and the capabilities of the vehicle, the established route of transportation of goods, other conditions of transportation and (or) the declaration of the declarant or carrier, as well as taking into account the requirements of the regime labor and rest of the driver of the vehicle in accordance with the international treaties of the Republic of Kazakhstan, but not more than the deadline for customs transit.

Source : https://www.gov.kz/memleket/entities/kgd-astana/press/news/details/1239134?lang=ru