Electric public transport vehicle, suitable to be employed in a public transport system comprising several recharging stations (6,8) placed one after the other along a public transport line, each station comprising:. at least one bipolar rail comprising a first and a second electrical conductor (110,112) each having two ends between which they extend in parallel to a direction of movement of an electric vehicle, the first and second conductors being electrically insulated from each other by means of an insulator capable of bearing a potential difference of at least 100 volts DC or AC between said two conductors, and also comprising a third electrical conductor, being electrically insulated from the first and second electrical conductors and earthed each bipolar rail of a recharging station being electrically insulated from the bipolar rail or rails of any of the other recharging stations,. a power supply for the first and second electrical conductors with a first and second potential different from the earth potential,. a leakage current sensor suitable to detect the presence of a leakage current developing between the first or the second electrical conductors of the bipolar rail if the amperage of the leakage current surpasses a pre-set limit, said vehicle being equipped with:. a body in conductive material,. several wheels supported by a roadway, each wheel being formed by a tyre and a rim, so that the electric vehicle is considered as being electrically insulated from the road surface on which it travels, and. at least a first and a second collector shoe (126,128) able to rub, respectively, upon the first and second conductors of any one of the bipolar rails, in order to capture electrical energy for the electric vehicle when the vehicle travels along said bipolar rail, the electrical vehicle being characterised in comprising a third collector shoe connected to the body of the vehicle, said third collector shoe being suitable to rub against the third electrical conductor when the vehicle travels along the bipolar rail to connect the body to earth potential at the same time as the first and second collector shoes rub against the first and second electrical conductors of said bipolar rail.. at least one bipolar rail comprising a first and a second electrical conductor (110,112) each having two ends between which they extend in parallel to a direction of movement of an electric vehicle, the first and second conductors being electrically insulated from each other by means of an insulator capable of bearing a potential difference of at least 100 volts DC or AC between said two conductors, and also comprising a third electrical conductor, being electrically insulated from the first and second electrical conductors and earthed each bipolar rail of a recharging station being electrically insulated from the bipolar rail or rails of any of the other recharging stations,. a power supply for the first and second electrical conductors with a first and second potential different from the earth potential,. a leakage current sensor suitable to detect the presence of a leakage current developing between the first or the second electrical conductors of the bipolar rail if the amperage of the leakage current surpasses a pre-set limit, said vehicle being equipped with:. a body in conductive material,. several wheels supported by a roadway, each wheel being formed by a tyre and a rim, so that the electric vehicle is considered as being electrically insulated from the road surface on which it travels, and. at least a first and a second collector shoe (126,128) able to rub, respectively, upon the first and second conductors of any one of the bipolar rails, in order to capture electrical energy for the electric vehicle when the vehicle travels along said bipolar rail,