Urban transport lines including bus lines, tram lines and trolleybus lines. Data do not include the so-called "closed" lines, which service only employees of particular companies. Transportation line is understood as a route connecting the extreme points of the route of vehicles marked with the same number or alphabetic symbol. Length of the urban transport lines - the sum of length of all scheduled daytime bus, tram and trolleybus lines on which vehicles marked with separate numbers or alphabetic symbols travel. Indicators relating to the number and structure of the population (gender, age group) since 2010 have been recalculated in accordance with the balance sheet prepared on the basis of the results of the National Census 2011. Indicators relating to the number and structure of the population (gender, age group) since 2020 have been recalculated in accordance with the balance sheet prepared on the basis of the results of the National Census 2021.