JSTE Journal of Traffic Engineering
Online ISSN : 2187-2929
ISSN-L : 2187-2929
Special Edition A (Research Paper)
Analysis on speed distribution on Metropolitan Expressway using radar precipitation intensity
Mitsuhiro HATTORIHajime INAMURATakashi OGUCHINaohiko HIBINOShigeru MORICHI
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2021 Volume 7 Issue 2 Pages A_133-A_141

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Abstract

Under the rainy weather, compared with the dry weather, driving condition is worsened by the extension of the braking distance and reducing visibility. In this research speed distributions are shown to contribute traffic safety and effective operation on the highway by using high spatiotemporal resolution radar network data called XRAIN. At the beginning, the advantage of using XRAIN is presented, compared XRAIN data with AMeDAS rain gauge data, on the highway by showing actual raining example on 10th of August 2015. By using XRAIN data and vehicle detector data on the Metropolitan Expressway #3 Shibuya line and #4 Shinjuku line, non-linear relation is found between operating speed on highway and precipitation intensity. The speed reduction in a lower precipitation intensity is higher than the speed reduction in a higher precipitation intensity. In addition, similar distributions are found in the corner section. However, as the curvature increases, its tendency becomes weaker.

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© 2021 Japan Society of Traffic Engineers
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