System for electrically feeding at least one electrically powered vehicle, comprising: - at least one elongated slotted element (2; 402; 502) being suspended and adapted to extend along a road section on which the at least one vehicle is adapted to travel with its lengthwise direction substantially in parallel with the direction of travel, said elongated slotted element comprising at least one electric conductor (5; 505) arranged in at least one slot (7; 507) in said elongated slotted element and being adapted to be electrically energized; - at least one current collector being adapted to co-act with said at least one suspended elongated slotted element, said current collector comprising at least one contact element (6; 206; 506) being adapted to connect electrically with corresponding at least one electric conductor (5; 505) of said elongated slotted element; at least one collector arm (8; 108; 308a-b) supporting the at least one contact element at its first end and being adapted to connect directly or indirectly to an electrically propellable vehicle at its second end (8"), and at least one actuator (9; 109a-b) configured to act on the at least one collector arm to displace the first end towards the at least one suspended elongated slotted element, wherein said contact element (6; 106; 206; 506) is connected to the at least one collector arm by means of a tracking device (10; 110; 510), said tracking device comprising a body part (11; 111; 211; 411; 511) to which said at least one contact element is connected, characterized in that said tracking device further comprises lateral guiding means comprising at least two guiding wheels (12a-b; 115a-d; 215a-d; 415a-b; 515a-b) or sliding elements configured to roll or slide against laterally facing surface portions (2', 2"; 502', 502") on both lateral sides on an exterior portion of the elongated slotted element (2; 502) to guide the tracking device laterally relative to said elongated slotted element, wherein said at least two guiding wheels or sliding elements are laterally displaceable relative to said body part by means of an alignment actuator. - at least one elongated slotted element (2; 402; 502) being suspended and adapted to extend along a road section on which the at least one vehicle is adapted to travel with its lengthwise direction substantially in parallel with the direction of travel, said elongated slotted element comprising at least one electric conductor (5; 505) arranged in at least one slot (7; 507) in said elongated slotted element and being adapted to be electrically energized; - at least one current collector being adapted to co-act with said at least one suspended elongated slotted element, said current collector comprising at least one contact element (6; 206; 506) being adapted to connect electrically with corresponding at least one electric conductor (5; 505) of said elongated slotted element; at least one collector arm (8; 108; 308a-b) supporting the at least one contact element at its first end and being adapted to connect directly or indirectly to an electrically propellable vehicle at its second end (8"), and at least one actuator (9; 109a-b) configured to act on the at least one collector arm to displace the first end towards the at least one suspended elongated slotted element, at least one contact element (6; 206; 506) being adapted to connect electrically with corresponding at least one electric conductor (5; 505) of said elongated slotted element; at least one collector arm (8; 108; 308a-b) supporting the at least one contact element at its first end and being adapted to connect directly or indirectly to an electrically propellable vehicle at its second end (8"), and at least one actuator (9; 109a-b) configured to act on the at least one collector arm to displace the first end towards the at least one suspended elongated slotted element, wherein said contact element (6; 106; 206; 506) is connected to the at least one collector arm by means of a tracking device (10; 110; 510), said tracking device comprising a body part (11; 111; 211; 411; 511) to which said at least one contact element is connected, characterized in that said tracking device further comprises lateral guiding means comprising at least two guiding wheels (12a-b; 115a-d; 215a-d; 415a-b; 515a-b) or sliding elements configured to roll or slide against laterally facing surface portions (2', 2"; 502', 502") on both lateral sides on an exterior portion of the elongated slotted element (2; 502) to guide the tracking device laterally relative to said elongated slotted element, wherein said at least two guiding wheels or sliding elements are laterally displaceable relative to said body part by means of an alignment actuator.