Revenue protection officers also patrol Yarra Trams and Metro Trains Melbourne services in Victoria. They were introduced in a bid to curb fare evasion after conductors were taken away from the trams. Replacement of conductors with ticket machines as the point of sale method has also resulted in thousands of commuters evading fares on Melbourne trams. Many people view RPIs and RPOs negatively, and in the discharge of their duties, they regularly face being verbally abused and sometimes even physically assaulted. It is believed that an estimated 1,500 people are reported each week on services.