A method and system for instantly discovering the trigger point of expressway congestion
A trigger point and expressway technology, applied in the field of intelligent transportation, can solve the problem of not being able to quickly find the trigger point of traffic congestion, and achieve the effects of improving accuracy, good real-time performance and high efficiency
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Embodiment 1
[0041] This embodiment provides a method for instant discovery of expressway congestion trigger points, such as figure 1 shown, including the following steps:
[0042] S1: Use video tracking technology to continuously track the vehicles driving on the expressway throughout the whole process, and obtain the position and speed of each vehicle in real time.
[0043] S2: Determine whether the speeds of all the tracked vehicles are consistent, if not, go to step S3, if they are consistent, go to step S5.
[0044] S3: Obtain the first speed of the vehicle at the current location and the second speed of the vehicle L meters ahead, and determine whether the difference between the second speed and the first speed is greater than the speed difference threshold, if so, go to step S4, otherwise return to step S1.
[0045] S4: It is determined that the road is congested and the current location is the congestion trigger point.
[0046] S5: Judging whether the vehicle speeds are all lower...
Embodiment 2
[0056] This embodiment provides a system for instant discovery of expressway congestion trigger points, such as Figure 4 shown, including:
[0057] The video tracking unit continuously tracks the vehicles driving on the expressway throughout the whole process, and obtains the position and speed of each vehicle in real time. The first judging unit judges whether the speeds of all the tracked vehicles are consistent. The second judging unit is used to obtain the first speed of the vehicle at the current position and the second speed of the vehicle at L meters ahead when the speeds of all the vehicles being tracked are inconsistent, and judge whether the difference between the second speed and the first speed is greater than Speed difference threshold. The trigger point determination unit is configured to determine whether the current location is a congestion trigger point when the difference between the second speed and the first speed is greater than a speed difference thr...
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