A PROCEDURE TO DETECT SPEED DETERIORATION SECTION BY USING ETC2.0 DATA

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  • ETC2.0データを用いた高速道路上の速度低下区間の検出法

Abstract

An overtake-lane in Japan is often added to pass by the low speed car on highway with two-lanes heading for opposite direction. However, the quantitative guideline to facilitate the over-take lane is not given. A performance of the road on two-lanes for opposite heading highway will be greatly influenced by the low speed cars which make a queue behind them. However, research on speed deterioration caused by low speed car is not yet studied so much. ETC2.0 system gives big data on real-time traffic trajectory and speed data recorded in every 200 meters interval. The purpose of this study is to identify the section needs to add an overtake-lane on two-lanes opposite heading highway by extracting speed deterioration section and other conditions by using ETC2.0 data. As the model to analyze the trip speed distribution, this study adopts decision tree analysis which can output the combination of several factors. Decision tree analysis can successfully give several subject of samples with speed deterioration associated with the causes. On the basis of the output we obtained. Some of countermeasures to decrease the traffic at the target section, or to awake attentions for constant driving speed was considered, rather than additional over-take lane.

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