Public transport in Bratislava is managed by Dopravný podnik Bratislava, a city-owned company. The transport system is known as Mestská hromadná doprava (MHD, Municipal Mass Transit), and the network is the largest in Slovakia. The history of public transportation in Bratislava began with the opening of the first tram route in 1895, when the city was in the Kingdom of Hungary, part of the Austro-Hungarian empire.[1] Passengers must buy their tickets before entering the vehicle. Revenue from tickets covers approximately 40% of expenses, with the other 60% paid by the city.