双车道公路超车视距计算方法_王润琪1
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第 11 卷 第 3 期
2011 年 6 月
交 通 运 输 工 程 学 报
Journal of T raffic and T ransportation Engineering
Vol11 No3
Jun 2011
收稿日期 20110126
基金项目 湖南省自然科学基金项目07JJ6024 07J J6125
作者简介 王润琪1955 男湖南长沙人 中南林业科技大学副教授 从事交通运输研究
文章编号 16711637201103006806
双车道公路超车视距计算方法
王润琪 周永军 肖传恩
中南林业科技大学 物流学院 湖南 长沙410004
摘要从安全行车角度分析了影响双车道公路超车视距的 5 个因素 设计了超车汽车 被超车汽
车和对向来车三者在双车道公路的行车示意图 建立了计算超车汽车从开始超车到完成超车所需
超车视距的数学模型 确定了汽车制动距离 同车道车头间距等计算参数 运用数学解析方法 提
出了超车视距的具体计算公式 选择不同设计速度和行车速度 计算了小汽车和货车在双车道公
路的超车视距 分析结果表明 双车道公路超车视距与公路设计速度 超车汽车的超车速度 被超
车汽车和对向来车的行驶速度 同车道车头间距有关 当被超车汽车和对向来车的速度小于超车速
度一半时 超车视距的计算值才接近规定值 从安全角度看 中国双车道公路超车视距规定值偏小
关键词 双车道公路 超车视距 设计速度 车头间距 行驶速度 超车速度
中图分类号 U441 文献标志码 A
Calculation method of overtaking sight distance for duallane highway
WANG Runqi ZH OU Yo ngjun X IA O Chuanen
Scho ol o f L ogistics Central So uth Univ ersity of F orestr y and T echnology Changsha 410004 H unan China
Abstract 5 facto rs aff ecting the o vertaking sight distance of duallane highw ay w ere analyzed
fro m the view of saf e driving T he running sketch m ap of ove rtaki ng car overt ook car and
opposi te car o n duallane highw ay w as designed T he mathemati c m odel of calculating o vertaking
sight distance f or overt aking car from begi nning ov ertaking to fi nishing overtaking w as
e stablished T he calculating param eters we re defined such as braking distance and space headw ay
on same lane et c and t he specific calculating fo rm ula of overtaking sight distance w as proposed
by means of mathemati c analy sis met hod A cco rding t o different desig n speeds and driving
speeds the o vertaking sight distances o f car and t ruck on duallane hig hway w ere calculated
Analy sis result indicat es that t he ov ertaking sight distance of duallane highw ay is concerned wi th
the design speed o f hig hw ay t he overt aking speed of ove rtaking car the speeds of o verto ok car
and opposi te car and space headw ay o n sam e lane When the speeds of overtook car and opposite
car are less than a half o f overtaking speed the calculated value o f o vertaking sig ht distance is
just clo se to its specified value Specif ied overt aking sig ht distance of duallane highw ay is smaller
fro m safet y view 4 tabs 1 fig 10 ref s
Key wordsduallane highw ay overtaking sig ht distance desig n speed space headw ay driving
speed ove rtaking speed
Author resume WANG Runqi1955 male associate professor
8673185623945 wanrun888
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