Traffic monitoring system for tunnel vehicles

The invention relates to the field of tunnel monitoring, in particular to a traffic monitoring system for tunnel vehicles, comprising: a data acquisition unit comprising a plurality of monitoring devices for tunnel video acquisition, a thermocouple device for tunnel temperature acquisition and a gas concentration detection device for combustion gas concentration acquisition; the data analysis unit is used for determining a traffic flow state according to the outlet flow anomaly degree and the outlet flow integrating degree, and determining an information monitoring mode according to the traffic flow state; the positioning analysis unit is used for determining target positioning vehicles according to the associated delay degree of each delayed vehicle and determining search points of the monitoring device according to the number of the target positioning vehicles; the adjustment compensation unit is used for determining whether to adjust the initial search point or not according to the tunnel wind speed, or ad