Multi-lane free flow electronic toll collection system arranged on side of road

The invention relates to the field of an intelligent transportation system, in particular to a multi-lane free flow electronic toll collection system arranged on the side of a road. The multi-lane free flow electronic toll collection system comprises at least two phased array multilane free flow antennas arranged on the two sides of the road and used for measuring a vehicle electronic tag on a vehicle as well as angle information between the two phased array multilane free flow antennas respectively and transmitting the angle information as well as first time information during the measurement to a lane controller; and the lane controller is used for calculating according to the angle information between the two phased array multilane free flow antennas as well as self position information to obtain first position information of the vehicle, saving the first position information and the first time information of the vehicle and carrying out toll collection according to the first position information and the vehicle electronic tag of the vehicle. Through the system provided by the embodiment of the invention, the technical difficult problem that a transverse portal frame is erected above the wide road can be solved, so that the erection cost of the multi-lane free flow system is reduced.