Public transport is based on a fairly dense network of tram and bus routes operated by a municipal company, supplemented by a number of private minibus operators. Local trains connect some of the suburbs. The bulk of the city's historic area has been turned into a pedestrian zone with rickshaws and horse-drawn carriages; however, the trams run within a three-block radius. The historic means of transportation in the city can be examined at the Museum of Municipal Engineering in the Kazimierz district, with many old trams, cars and buses.