# Active RFID positioning of vehicles in road traffic RFID tags have been proposed to improve lane positioning performance, especially in tunnels where conventional GPS is not currently available. ## References 1. [Active RFID positioning of vehicles in road traffic](https://ieeexplore.ieee.org/document/6089737) 2. [zhang-2011-active_rfid_positioning_of_vehicles_in_road_traffic](attachments/zhang-2011-active_rfid_positioning_of_vehicles_in_road_traffic.pdf) # Footnotes