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Using 5.8G dedicated short-range communication DSRC technology, in the multi-lane free flow traffic state, the base station is identified through the ETC route, the route identification information is written into the ETC electronic tags and user IC cards of the passing vehicles, and the ETC roadside unit is passed at the exit The route information in the ETC electronic tag is read out to form a transaction flow with route information, which is passed back to the back-end splitting settlement system for accurate splitting of tolls, and it can also be used to collect tolls according to the actual driving route.
Maintain the consistency of the existing ETC business, add the function of path recognition on the basis of the existing ETC business application specifications, without modifying the ETC electronic label, and do not affect the vehicle traffic speed of the entrance and exit ETC lanes;
The self-developed multi-lane free flow technology can complete the writing of path information without affecting the normal driving of the vehicle. The maximum allowable speed is not less than 150km/h, and the identification success rate is 99%, which does not cause any impact on the normal driving of the vehicle. interference.
The highway network scale and traffic volume are getting bigger and bigger, and the road network structure is getting more and more complicated. Due to the ambiguous path problem, the tolls that need to be accurately split are taking up more and more. The contradiction is prominent and needs to be solved urgently.
Expressway users are divided into ETC users and MTC users according to the charging method. The ambiguous path identification problem of MTC users has been solved by dual-frequency RFID technology (refer to our company’s solution “Highway Ambiguity Path Identification RFID System”). The solution mainly solves the problem of ambiguity path identification for ETC users.
The system includes path information identification and the process of generating complete path information. The front-end system includes three parts: ETC path identification base station, ETC electronic label and user IC card, and wireless communication system. The schematic diagram is as follows:
Path identification: In the multi-lane free flow state, the passing ETC vehicles are identified through the DSRC communication link;
Flow collection: In the multi-lane free flow state, accurately collect ETC traffic flow information through the DSRC two-way communication function;
Vehicle speed measurement: In the multi-lane free flow state, the vehicle identity is identified through the DSRC communication link, and the interval speed measurement is completed.
(1) It is seamlessly compatible with the existing ETC system, requiring only a small amount of new construction and software upgrades;
(2) All technical products have passed actual engineering tests and verifications, and are mature and reliable;
(3) Self-developed multi-lane free flow technology with independent intellectual property rights.
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