高速公路路侧标志遮挡问题

李文权

高速公路路侧标志遮挡问题

李文权

东南大学交通学院，江苏南京 210096

基金项目:

国家自然科学基金项目 50478071

详细信息

作者简介:
李文权(1964-)，男，河南宝丰人，东南大学教授，工学博士，从事交通运输规划与管理研究

中图分类号: U491.52
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- PDF下载量: 247
- 被引次数: 0
出版历程
- 收稿日期: 2006-01-27
- 刊出日期: 2006-09-25

Blocking problem of freeway side traffic signs

LI Wen-quan

School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China

More Information

Author Bio:
Li Wen-quan(1964-), male, PhD, professor, 86-25-83795647, wenqli@seu.edu.cn

摘要

摘要: 为了提高多车道高速公路内侧车道行驶的小车驾驶员视认路侧交通标志的准确率, 运用驾驶员的视认规律、车辆到达规律和概率计算方法, 建立了路侧交通标志遮挡问题的数学模型和算法。运用理论模型得出连续设置路侧交通标志的方法和步骤为: 决定标志设置位置, 计算遮挡矩形长度, 计算遮挡概率, 决定连续设置标志个数。计算结果表明: 设置1~6块标志时, 因遮挡驾驶员不能读取标志信息的概率为2.1×10^-1~9.4×10^-5, 不能读取标志信息的概率随连续设置标志的数量呈指数下降趋势, 建立连续设置路侧标志的模型和方法简便, 方案可行, 可以解决多车道高速公路路侧标志的遮挡问题。
- 交通规划 /
- 高速公路 /
- 交通标志 /
- 数学模型 /
- 通行能力 /
- 安全设施 /
- 标志遮挡
Abstract: In order to improve the accurateness that car driver recognizes roadside signs on the inboard driveway of more-lanes freeway, the mathematical model and algorithm to deal with the blocking problem of roadside traffic signs were set up by using driver visiblity disciplinarian, vehicle arrival disciplinarian and probability computation methods, the individual approaches and methods for setting roadside traffic signs in sequence were obtained by the theoretical model, they were how to determine the location of roadside signs, calculate the length of blocking rectangle, calculate the shelter probability and choose the number of roadside signs set in sequence. The simulation result shows that the blocking probability varies from 2.1 ×10^-1 to 9.4×10^-5 when the number of roadside signs set in sequence varies from 1 to 6, the blocking probability exponentially decreases with the number increase that of roadside signs, which indicates that the established models and methods to set roadside traffic signs in sequence are feasible, it can solve the blocking problem of roadside traffic signs on freeway with more lanes. 2 tabs, 7 figs, 10 refs.
- traffic planning /
- freeway /
- traffic signs /
- mathematical model /
- highway capacity /
- safety device /
- signs blocking

HTML全文

图 1 路侧标志遮档问题

Figure 1. Blocking problem of side traffic signs

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图 2 大车远档标志

Figure 2. Traffic signs being sheltered by large vehicle

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图 3 标志的认读过程

Figure 3. Process of cognizing traffic signs

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图 4 标志的消失距离

Figure 4. Disappearing distance oftrafflc signs

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图 5 标志的认读过程

Figure 5. Process of cognizing traffic signs

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图 6 情况1

Figure 6. Case 1

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图 7 情况2

Figure 7. Case 2

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表 1 车型参数

Table 1. Vehicle parameters

设计车型	长/m	宽/m	高/m	轴距/m
小车	4.7	1.7	2.0	2.7
货车	12.0	2.5	3.8	6.5
拖挂	16.5	2.5	3.8	4.0+9.0

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表 2 车型换算系敛

Table 2. Equivalent coefficients of vehicle types

车型	小车	大车
车辆换算系数	1.0	2.0

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参考文献(10)

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