Multilane free flow (MLFF) tolling is a kind of method dealing with worsening urban traffic environment using  barrier free tolling management. This method can also be applied to regulate and control the traffic flow at the peak time and hot spot. It uses double gantry instead of toll station, which install iTag R3 roadside equipment that can communicate with iTag V3 OBE at high speed information processing rate. MLFF makes a quiet, smooth, peaceful city quality for our life circle.