Light rail is a modern development and use of the tram, with dedicated right-of-way not shared with other traffic, often step-free access and increased speed. Some systems attract vagrants who use the stations or trains as sleeping shelters, though most operators have practices that discourage this. Services can be fully profitable through high usership numbers and high farebox recovery ratios , or can be regulated and possibly subsidised from local or national tax revenue. Some research has supported this position,  but the measurement of benefits and costs is a complex and controversial issue. Some supporters of mass transit believe that use of taxpayer capital to fund mass transit will ultimately save taxpayer money in other ways, and therefore, state-funded mass transit is a benefit to the taxpayer. These services may also be international. Categories : Public transport Sustainable transport.
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