Method and system for remotely detecting a vehicle positioned in at least one of several possible adjacent lanes, which lanes are arranged one after the other in a lateral direction, wherein reading antennas are arranged to read received electro-magnetic signals received from vehicles, at different lateral reading locations. The method involves measuring an electromagnetic signal received from the vehicle by several of said reading antennas; determining, for each of said several reading antennas, a respective received electromagnetic signal strength; determining, based upon knowledge about a respective relative geometric position and the said respective determined signal strength of each of the said several reading antennas, a geometric center of gravity for a first signal strength function, which is the received signal strength as a function of physical lateral position; and detecting the vehicle as present in a lane in which the said geometric center of gravity lies.