Road network efficiency gain prediction method after breakthrough of broken road

Abstract

The invention provides a road network efficiency gain prediction method after breakthrough of a broken road. The method comprises the following steps: preprocessing road network vector data; extracting a broken road according to the road network; dividing the road network into a plurality of sub-communities; matching the broken road with the located sub-community; simulating a balance state after flow distribution in the sub-communities before and after a single group of broken roads is opened; according to the balance state of the road network before and after opening, calculating a broken road gain index; and processing the next single group of broken roads until the efficiency gain prediction of the road network after all broken road groups are connected is realized. According to the method, the road network is automatically divided into the sub-communities to calculate the gain after the broken end road is opened, so that the influence caused by the road network scale is avoided; road network nodes which are prone to causing cascade failure are effectively concerned through constraint on OD (Origin-Destination) requirements; and by constraining the gain statistical unit for the road through which the equivalent vehicle passes, the road without flow is prevented from participating in the operation, and the gain of opening the broken road to the road network efficiency can be effectively and reasonably measured.

Description

technical field [0001] The invention relates to the field of a traffic road network optimization evaluation method, in particular to a road network efficiency gain prediction method after a dead end road is opened. Background technique [0002] As the urban development model shifts from "incremental" to "stock", there is not enough room for large-scale "expansion and reconstruction" of roads, opening up existing dead-end roads to improve the microcirculation of the road network and update urban planning . As one of the contents of urban road engineering, it is necessary to use reasonable and intelligent methods to automatically quantify and evaluate the benefits of opening dead-end roads, and apply them to actual optimization applications. [0003] To predict the gain brought by opening up the road, the traditional method is to calculate the change of the shortest travel path after the network is improved. When calculating the efficiency change of the road network, it is u...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem in the prior art that the efficiency gain of the road network is affected by the scale of the road network after the dead end road is opened by providing a method for predicting the efficiency gain of the road network after the dead end road is opened.

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