Traffic abnormal road section probability identification method
An identification method and abnormal technology, applied in the field of intelligent transportation, can solve the problems of poor reliability and low adaptability
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[0084] Example: the calculation method of road anomaly index, including the following steps:
[0085] Step 1: Divide the 24 hours of the day into several 5-minute time slots. Assume that the latest 5 minutes in the database of the day are 12:20-12:25. After data cleaning, the real-time data of microwave point 890 on the day is Figure 4 .
[0086] WAVE_ID indicates the microwave point number, which is related to the road section, DEV_WAY_ID marks different lanes, SPEED is the average speed of the current lane, TOTAL_FLOW is the total flow of the current lane, COLLECT_DATE is the date of data collection, and COLLECT_TIME is the time of data collection. The recent historical data of No. 890 microwave point after data cleaning is as follows: Figure 5 shown.
[0087] Step 2: Take the vehicle speed data of microwave point 890 as an example to test the normality of the data source, and directly calculate the kurtosis coefficient and skewness coefficient of the vehicle speed in th...
Embodiment 2
[0093] Embodiment 2: abnormal traffic case.
[0094] Taking Hangzhou road network data as an example, using the above method to identify abnormal road sections, Figure 10 Calculated results for the anomaly index at 14:45 on December 5, 2014: Figure 10 The middle and large box is the road section ranked fifth in the anomaly index. The first number 133 represents the number of the microwave point, the second number 0.8798103 represents the anomaly index of the current road section, followed by the name and direction of the road section where the current microwave point is located; the small box It indicates that the real-time average vehicle speed during the time period from 14:45 to 14:50 of the day is 8km / h, and the total flow is 70 vehicles. It can be found that the current vehicle speed and flow are obviously abnormal.
[0095] The road section of No. 133 Microwave Point is from east to west on Shixiang Road in Hangzhou (near the Guashan Overpass). Through a video search...
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