摘要 道路設計一致性評價是一種用來保障道路安全性能的技術方法。設計一致性是指道路幾何線形既不違背駕駛員的期望，又不超越駕駛員安全操作車輛能力極限的特性。從行駛車輛運行特性的角度進行分析，違反駕駛員所預期的幾何特性的一個典型特征是在該幾何特性附近出現(xiàn)不連貫的運行車速，因此可以認為連貫的運行車速是設計一致性的產(chǎn)物。
本文借鑒了美國交互式道路安全設計模型IHSDM，應用運行車速斷面圖評估法，并結(jié)合我國道路的實際情況,建立了我國雙車道公路設計一致性評價模型。軟件以Visual C++為開發(fā)工具，由數(shù)據(jù)分析、車速斷面圖輸出以及設計一致性評價三個模塊構(gòu)成。軟件實現(xiàn)的功能主要是預測路段的運行車速包括平曲線和直線段的車速，以及進入、離開曲線的加減速度長度的預測，并利用TWOPAS預測坡度限制車速，即考慮坡度對車速的影響進行逐點修正，最后通過相鄰幾何線形區(qū)段運行車速的變化梯度△V85和運行車速與設計車速的偏差值V85—Vd兩個評價指標來評價道路的安全性能。
目前我國對雙車道二三級公路道路線形對交通安全的影響的研究相對比較少，雙車道公路設計一致性軟件的開發(fā)對我國二三級公路的線形設計和安全評價具有一定的參考價值，評價可貫穿道路工程設計和運營等各個階段，這將減少我國二三級公路的交通事故，減少經(jīng)濟損失，有利于保障我國的交通安全和提高國民經(jīng)濟的發(fā)展。

關鍵詞：雙車道公路 設計一致性 運行車速 期望車速 安全評價



Two-lane highway design consistency of software development

Abstract Road design consistency of assessment is a technical method that is used to protect road safety. Design Consistency means that the road’s alignment Condition neither against the expectations of the driver, nor exceed the safe operation of the vehicle capacity limit. From the perspective of operating the vehicles, a typical characteristic which beyond the driver’s expectation of the alignment Condition characteristics in the vicinity where there is a incoherent operation speed, so that the continuity of the operation speed is a product of design consistency.
By studying the United States Interactive Highway Safety Design Model (IHSDM), the article uses speed profile model, combined with the actual situation of China's roads, establishing China's two-lane highway design eva luation model of design consistency. The software developed by Visual C++, which is composed of three modules: data analysis, speed profile model output and design consistency of eva luation The main function is predicting operation speed, including the speed of simple curve and tangent, besides predicting leaving the curve length of acceleration or deceleration, and predicting grade-limited speed using the TWOPAS that is to consider the effect of the grade on speed to modify the speed by point , finally eva luating the safety of the road by two indicators V85-Vd and △V85
At present, there has not put much importance on road alignment of the two-lane highway effecting traffic safety in China, the development of two-lane highway design consistency software, which produce much value on alignment design and safety eva luation of the two-lane highway, the eva luation can be run through the design and operation of road projects in various stages, which will reduce two-lane highway traffic accidents, reduce economic losses, to improve traffic safety and enhance national economic development.

Key words Two-lane highway design consistency operation speed desire speed safety eva luate

目 錄
第一章 概 述 1
1．1 我國公路交通安全狀況和特點 1
1．2 我國雙車道公路安全狀況 2
1．3 道路條件與交通安全 3
1．4 研究內(nèi)容及意義 4
1．4．1 研究內(nèi)容 4
1．4．2 研究意義 5
第二章 設計一致性理論及分析方法 6
2．1 設計一致性分析方法 6
2．1．1國外研究現(xiàn)狀 7
2．1．2 國內(nèi)研究現(xiàn)狀 11
2．2 車速一致性理論分析 12
2．2．1 車速理論概述 12
2．2．2 Vd、V85與Ve三者間的關系分析 13
2．3 車速斷面圖評估法 14
第三章 設計一致性軟件開發(fā)及應用 17
3．1 開發(fā)背景 17
3．2 軟件算法設計 18
3．3 軟件編制 24
3．4 實例分析 26
3．4．1 試驗路段概況及設計資料 26
3．4．2 評價結(jié)果分析 27
結(jié) 論 30
致 謝 31
參考文獻： 32