A vehicle of a system ("S") for propelling an electrically propellable vehicle along a roadway, said vehicle comprising an arrangement for metal detection, the system comprising a) a plurality of roadway sections (2a1, 2a) for subdividing the roadway, wherein each one of these roadway sections (2a1, 2a) comprises one or more elongated tracks or slits (51, 52) having conductors (4a, 4b) introduced therein adapted to be supplied with current and put under voltage, and being connectable over a switch to one or more vehicle-external power sources ("III"), for thereby enabling charging of said set of batteries ("II", B) belonging to the vehicle, but primarily driving the vehicle over the set of batteries ("II", B) along the roadway and the roadway sections (2a1, 2a), and b) one or more vehicles propellable by means of an electric motor or motors, with each of the respective vehicles comprising a control circuit (100, "R1") adapted for distribution of power, adapted for creating a required power and/or speed control, wherein said vehicle is provided on its underneath side with an arm-shaped contact means displaceable up and down and sideways, in relation to the direction of transportation of the vehicle,, wherein said elongated track or tracks (51, 52) and the conductors (4a, 4b) extend along the roadway and the roadway sections (2a1, 2a), said elongated tracks (51, 52) being formed in a rail consisting of metal, the upper portions of which are adapted to engage the roadway of the road section (2a1, 2a), wherein the control circuit comprises a control equipment and wherein said contact means is coordinated with the control equipment for creating an adaptation of the contact means so as to at least offer a mechanical and electrical contact with said conductors (4a, 4b), wherein coordination between the conductors (4a, 4b), put under voltage, arranged in the roadway section (2a1) and the contact means of the vehicle occurs via coordinated current collectors adapted for mechanical and electrical cooperation with the respective conductors (4a, 4b), characterized in that the detecting arrangement comprises one, two or more coils configured to generate a magnetic field, said coils being arranged on said vehicle, and comprises one or more coils (Sp1, Sp2) arranged for sensing the variation of the magnetic field, said magnetic field being correlated to a horizontal distance between the coils (Sp1, Sp2) and metal parts of the one or more elongated tracks (51, 52) and/or a vertical distance between the coils and the one or more elongated tracks (51, 52), and wherein the coils (Sp1, Sp2, Sp3) are coordinated with the control equipment. a) a plurality of roadway sections (2a1, 2a) for subdividing the roadway, wherein each one of these roadway sections (2a1, 2a) comprises one or more elongated tracks or slits (51, 52) having conductors (4a, 4b) introduced therein adapted to be supplied with current and put under voltage, and being connectable over a switch to one or more vehicle-external power sources ("III"), for thereby enabling charging of said set of batteries ("II", B) belonging to the vehicle, but primarily driving the vehicle over the set of batteries ("II", B) along the roadway and the roadway sections (2a1, 2a), and b) one or more vehicles propellable by means of an electric motor or motors, with each of the respective vehicles comprising a control circuit (100, "R1") adapted for distribution of power, adapted for creating a required power and/or speed control, wherein said vehicle is provided on its underneath side with an arm-shaped contact means displaceable up and down and sideways, in relation to the direction of transportation of the vehicle,,