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Saturation flow determination method and device

A determination method and technology of a flow determination module, applied in the field of intelligent transportation, can solve problems such as measuring and calculating saturated flow values

Active Publication Date: 2012-06-20
QINGDAO HISENSE TRANS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the acquisition of saturated flow values ​​is by field observation method. A large number of personnel are organized to observe intersections on the spot, record relevant parameters, and then process the observed data to obtain saturated flow values. There is no implementation plan that can automatically measure and calculate saturated flow values.

Method used

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  • Saturation flow determination method and device

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Embodiment Construction

[0021] In order to realize the automatic calculation scheme of the saturated flow, the embodiment of the present invention provides a method for determining the saturated flow. In this method, according to the pulse data output by the detector installed at the entrance of the signalized intersection, the headway is counted, and The saturation flow value is determined according to the statistically obtained headway. The detector used in the present invention may be any detector capable of detecting the presence of an object.

[0022] see figure 1 , the method for determining the saturated flow rate provided by the embodiment of the present invention includes the following steps

[0023] Step 10: collect the pulse data output by the detector arranged at the entrance of the signalized intersection; the detector is used to detect in real time whether there is a vehicle at the entrance, and the pulse data is the data used to represent the detection result; then, According to the ...

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Abstract

The embodiment of the invention discloses a saturation flow determination method and a device, belongs to the intelligent transportation field, and is used for automatically reckoning the saturation flow value. The invention comprises the following steps: acquiring pulse data output by a detector at the inlet passage of the signal crossing; counting the car head time interval at the inlet passage; and determining the saturation flow value according to the counted car head time interval. Therefore, an automatic saturation flow reckoning scheme is realized.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a method and device for determining saturated flow. Background technique [0002] Saturation flow value is an important parameter in the timing design and traffic capacity research of signalized intersections. It refers to the maximum traffic flow value that can pass during the green signal time when there are quite long queues of vehicles waiting at the entrance of the signalized intersection. Expressed by the number of vehicles passing through the effective green light time per hour. [0003] Under certain road conditions and vehicle conditions, the saturated flow value is constant. But in reality, road conditions and vehicle conditions are not the same, so the saturation flow values ​​are also not the same. There are many factors that affect the saturated flow value, except for the oncoming traffic flow, lane position and width, traffic composition, the proportion o...

Claims

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Application Information

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IPC IPC(8): G08G1/01
CPCG08G1/0133G08G1/0116G08G1/01
Inventor 李瑾朱中李月高陈晓明王志明
Owner QINGDAO HISENSE TRANS TECH
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