Public transport within the urban area of Bucharest is provided by four major modes of mass transit: metro, tram, trolley bus and bus. In Bucharest, the number of passenger trips made by public transport has not fallen, even though motorisation is increasing. Within the framework of the EU TELLUS project (Transport and Environment Alliance for Urban Sustainability), the municipality of Bucharest intends to maintain the high level of public transport usage by improvements to service quality, reduced congestion, the prioritisation of public transport, intermodal coordination, and operational safety.