A method and system for instantly discovering the trigger point of expressway congestion

Abstract

The invention provides a method and system for finding out expressway congestion trigger points immediately. A video tracking technology is used for conducting continuous tracking on vehicles running on an expressway; through the video tracking technology, driving states of the vehicles can be obtained more accurately, and whole-course continuous tracking of the vehicles can be achieved, and detection is not only conducted on one cross section. In addition, after the video continuous tracking technology is used, the positions of the congestion trigger points can be obtained accurately by only comparing vehicle speeds at different positions, and therefore better real-time performance is achieved. Furthermore, due to the fact that whole-course continuous tracking can be conducted on the vehicles, the congestion trigger points can be determined in real time without the need of upstream and downstream relevance, and therefore the method and system for finding out expressway congestion trigger points immediately have higher efficiency.

Description

technical field

[0001] The invention relates to the technical field of intelligent transportation, in particular to a method and system for instantly discovering the trigger point of expressway congestion. Background technique

[0002] With the continuous expansion of the city scale, the demand for transportation has increased sharply, and traffic congestion during peak hours in large cities has become the norm, which brings great inconvenience to people's travel and seriously affects the rapid development of the urban economy. In order to solve the problem of traffic congestion, governments at all levels have invested a lot of money to take various measures to alleviate the traffic congestion caused by rush hour, but the effect is not significant. The main reason is that it is impossible to identify the current road traffic congestion. Only by finding the trigger point can the cause of the congestion be found, so that effective measures can be taken to solve the congestion ...

Examples

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...

technical field

[0001] The invention relates to the technical field of intelligent transportation, in particular to a method and system for instantly discovering the trigger point of expressway congestion. Background technique

[0002] With the continuous expansion of the city scale, the demand for transportation has increased sharply, and traffic congestion during peak hours in large cities has become the norm, which brings great inconvenience to people's travel and seriously affects the rapid development of the urban economy. In order to solve the problem of traffic congestion, governments at all levels have invested a lot of money to take various measures to alleviate the traffic congestion caused by rush hour, but the effect is not significant. The main reason is that it is impossible to identify the current road traffic congestion. Only by finding the trigger point can the cause of the congestion be found, so that effective measures can be taken to solve the congestion ...

Examples

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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