There are several reasons why a debt may be charged to a vehicle's number plate: 1. All toll roads are divided into zones. At the boundary of each zone, devices are installed that read vehicle information and calculate the charge for that section. If a vehicle travels between these sections but does not pass through a toll plaza, or does not have enough funds in its account to be debited, the amount is charged as a debt. 2. Insufficient funds. Sometimes a driver does not have enough money to pay at the toll plaza. In that case, the outstanding amount is charged as a debt. 3. If, because of human factors (a road crash, a vehicle entering another lane), a queue of vehicles more than 300 metres long builds up at a toll plaza, all barriers are raised and vehicles pass without paying. However, the amount is recorded as a debt and added to the charge the next time the vehicle passes through the toll section.
Drivers who have not paid off their debts are sent a debt notice to their address. If the toll is not paid within the deadline set in the notice, the defaulter's details are passed to the Transport Control Inspectorate and a fine of 5 monthly calculation indices (MCI) is imposed. For legal entities, the fine is 10 MCI.