Ingalo engenzi lutho isekela isiphetho sesixhumanisi esimaphakathi ohlangothini lomgibeli wemoto.Ingalo engenzi lutho ibopha uhlaka lwemoto noma kuhlaka olungaphansi.Ngokuvamile, ingalo engenzi lutho inamathiselwe phakathi kolunye uhlangothi lwesixhumanisi esimaphakathi nengalo ye-Pitman kanye nohlaka lwemoto ukuze kubambe isixhumanisi esimaphakathi ekuphakameni okufanele.