Abstract: There is ambiguous path between the start point and end point in highway network, which leads to highway’s complex and inaccurate toll separation. How to indentify ambiguous paths is related to whether networking tolling is able to implement largescale. In this paper, ambiguous path indentification method based on dual frequency card is provided, which can solve all the problems such as vehicle toll collection, separation and settlement of highway, on condition that unchange the software and hardware of lane in highway tolling station. 

Key words: networking tolling, RFID, ambiguous path indentification