
Private transport is in contrast to public transport and commercial non-public transport. While private transportation may be used alongside nearly all modes of public transportation, private railroad cars are rare although heritage railways are not. Unlike many forms of public transportation, which may be government subsidized or operated by privately owned commercial organizations for mass or general public use, the entire cost of private transportation is born directly or indirectly by the individual user(s). However some scholars argue that it is inaccurate to say that the costs are covered by individual user because big (and often dominant) part of cost of private transportation is the cost of infrastructure on which individual trips rely. They therefore work also with model of quasi-private moblity.