Impact of median strip facilities on spatial right of way of roads under shy away effects

doi:10.16265/j.cnki.issn1003-3033.2024.12.0209

Abstract

Abstract:

In order to seek the best way of laying median strip facilities, four typical forms of median strips in China were established through driving simulation, and trajectory and speed-related data were extracted. Based on the horizontal right of way in the road spatial right of way, the road utilisation rate was selected as an indicator to analyse the difference characteristics between the actual right of way and the nominal right of way. The results show that the overall range of fluctuations in driver trajectories at different height facilities is significantly different. Among the rightward offsets triggered by the shy away effect, the trajectory offset reaches the maximum in the reboundable traffic cylinders scenario R₅, followed by the traffic separate railings R₇ and raised pavement markers R₂, which are larger than that of the double yellow line scenario R₁ without the facility. While adding facilities triggers a shy away effect in drivers, a certain degree of lateral offset can improve road utilisation rate, up to 11.15%, which was found in R₅. At the same time, the installation of the facility inhibits the speed of drivers, achieving a two-way improvement in traffic safety and traffic design. Finally, the width of the median strip to satisfy the maximum nominal right-of-way utilisation was calculated to be 0.844 m and the facility's height to be 138.62 cm.

Key words: shy away effect, median strip facility, spatial right of way, facility height, driving behaviour

CLC Number:

CHEN Ying, DU Zhigang. Impact of median strip facilities on spatial right of way of roads under shy away effects[J]. China Safety Science Journal, 2024, 34(12): 195-202.

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路侧设施种类	编号	道路参数	设施参数
双黄线	R₁	双向六车道,车道宽3.5 m,长 500 m, 坡度0°。限制速度 50 km/h	宽0.15 m,两标线中间间隔 0.2 m
突起路标	R₂		高25mm,间隔8 m布设一处,直径0.15m,搭配双黄线
弹性交通柱	R₃		高60 cm,柱体直径0.22 m,间隔2m,搭配双黄线
	R₄		高75 cm,柱体直径0.22 m,间隔2m,搭配双黄线
	R₅		高90 cm,柱体直径0.22 m,间隔2m,搭配双黄线
交通隔离栏	R₆		高1.1 m,底座宽0.38 m,搭配双黄线
	R₇		高1.2 m,底座宽0.38 m,搭配双黄线
	R₈		高1.3 m,底座宽0.38 m,搭配双黄线

显著性		R₃	R₄	R₅
轨迹	R₃	—	0.201	0.044^*
轨迹	R₄	0.201	—	0.453
速度	R₃	—	0.507	0.308
速度	R₄	0.507	—	0.721

显著性		R₆	R₇	R₈
轨迹	R₆	—	0.553	0.020^*
轨迹	R₇	0.553	—	0.080
速度	R₆	—	0.874	0.584
速度	R₇	0.874	—	0.481

分位数	场景	R₁	R₂	R₅	R₇
所有数据	R₁	—	0.537	0.000^*	0.000^*
	R₂	0.537	—	0.000^*	0.000^*
	R₅	0.000^*	0.000^*	—	0.000^*
5^th	R₁	—	0.001^*	0.000^*	0.104
	R₂	0.001^*	—	0.000^*	0.000^*
	R₅	0.000^*	0.000^*	—	0.009^*
95^th	R₁	—	0.149	0.000^*	0.023^*
	R₂	0.149	—	0.000^*	0.399
	R₅	0.000^*	0.000^*	—	0.004^*
50^th	R₁	—	0.787	0.000^*	0.002^*
	R₂	0.787	—	0.000^*	0.005^*
	R₅	0.000^*	0.000^*	—	0.003^*

分位数	场景	R₁	R₂	R₅	R₇
所有数据	R₁	—	0.000^*	0.000^*	0.000^*
	R₂	0.000^*	—	0.000^*	0.000^*
	R₅	0.000^*	0.000^*	—	0.000^*
50^th	R₁	—	0.000^*	0.000^*	0.000^*
	R₂	0.000^*	—	0.033^*	0.823
	R₅	0.000^*	0.033^*	—	0.056