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  本文選題：城市快速路　切入點：銜接部長度　出處：《長安大學》2014年碩士論文

【摘要】：目前，我國各大中城市交通擁堵已成城市交通的主要問題，為了緩解城市路網(wǎng)交通壓力，許多城市開始修建快速路系統(tǒng)，高架橋與互通式立交是快速路系統(tǒng)中重要組成部分。我國城市人口密集造成城市道路網(wǎng)的密度也相應較大，較大的路網(wǎng)密度使城市快速路系統(tǒng)在設(shè)計時往往將下匝道出口落地點布置在與快速路立交相鄰接的平面交叉口附近，故銜接部的長度往往受到路網(wǎng)規(guī)劃的限制，也未考慮銜接部的設(shè)計長度能否滿足后期通行能力和行車安全的需要，造成快速路建成后銜接部成為整個道路通行能力的瓶頸和事故多發(fā)點。論文提出快速路下匝道出口與鄰接交叉口銜接部的長度的研究，對改善銜接部的通行能力，減少交通堵塞和交通事故具有一定作用。 論文通過對西安市南二環(huán)與高新四路交叉口附近銜接部的現(xiàn)場調(diào)查，在對獲得的大量的實測數(shù)據(jù)整理、分析的基礎(chǔ)上，首先對實測得到的數(shù)據(jù)進行處理，選擇使用正交實驗法對Vissim仿真模型的一些重要可控參數(shù)進行參數(shù)標定，這就確保了模型在本論文所研究區(qū)域的適用性和可行性，確保了模型的仿真結(jié)果能夠符合西安市南二環(huán)的實際交通情況，并提出了符合西安市南二環(huán)交通情況與習慣的Vissim參數(shù)，然后建立了銜接部的Vissim仿真模型，運行模型并輸出數(shù)據(jù)，使用實測數(shù)據(jù)與仿真輸出數(shù)據(jù)進行對比，使用數(shù)理統(tǒng)計的方法對兩者進行對比后證明了模型仿真輸出數(shù)據(jù)與實際研究地點測量到的數(shù)據(jù)是相仿的，，這就證明我們在研究中使用仿真模型代替實際數(shù)據(jù)是可行的，也是正確的。利用該銜接部仿真模型進行仿真實驗，在實驗中通過改變輸入到模型中的銜接部不同長度和進入銜接部的不同交通量以及其他各種可控交通條件，然后輸出運行結(jié)果，進而得到了一系列的關(guān)于不同銜接部長度的銜接部內(nèi)交通總流量和銜接部各部分車輛行車速度的有關(guān)數(shù)據(jù)。對輸出的數(shù)據(jù)進行處理與歸類后，代入到銜接部速度-流量-密度公式進行計算，最終得到不同長度銜接部內(nèi)一定交通總流量對應的車流密度，利用SPSS回歸分析軟件得到不同長度銜接部內(nèi)車流密度與交通總流量的關(guān)系公式，利用歸納總接的銜接部服務水平劃分標準，得出不同服務水平銜接部的長度與銜接部交通總流量的折線關(guān)系圖。在不同服務水平銜接部的長度與銜接部交通總流量的折線關(guān)系圖上做平行線便能得到需要的銜接部長度。 論文研究成果為城市快速路設(shè)計規(guī)范的修編提供了一定的參考依據(jù)，具有較好的實用價值。
[Abstract]:At present, China's large and medium-sized city traffic congestion has become the main problem of city traffic, in order to ease the traffic pressure of the city road network, many city began construction of expressway system, the viaduct and interchange is an important part of the expressway system in our country. The crowded city to city road network density can be increased, the density of the network the larger the city expressway system in the design often will be arranged in the landing ramp exit near the intersection with the expressway overpass adjacent, so the length of the link is often affected by network planning restrictions, also did not consider the length design of the connective part can meet the late traffic capacity and traffic safety needs, resulting in expressway is completed the capacity of the entire road junction has become the bottleneck and the accidents. The expressway ramp exit and adjacent intersection junction length The study has a certain role in improving the capacity of the junction and reducing traffic jams and traffic accidents.
The site of the Xi'an city and the South Second Ring Road intersection near the four high cohesion Department survey, in order to obtain a large number of measured data, based on the analysis, processing of the measured data obtained from the first, choose to use the orthogonal experiment to the Vissim simulation models of some important parameters of the calibration parameters. It ensures the feasibility and applicability of the model in the study area of this paper, to ensure that the simulation results of the model can meet the actual traffic conditions near the south of Xi'an City, and puts forward the traffic situation of Xi'an city with the South Second Ring and Xi Vissim parameters used, and then set up a simulation model of Vissim junction, operation model and output the data were compared with the measured data and simulation output data, using mathematical statistic method for the comparison of the two shows that the model simulation data and actual research point The amount of the data is similar, this proves that we use the simulation model in the study instead of the actual data is feasible, also is correct. The simulation experiment is conducted using the connections of the simulation model, by changing the input to the connections of the model in different length and different traffic into the connecting part and other controllable traffic conditions in the experiment, and then the output result, and then get the relevant data about the different connections of the length of the connecting part of a series of traffic flow and connection of each part of vehicle speed. The output data were processed and classified, into the connections of the speed flow density was calculated, finally the total flow of certain traffic with different length cohesion within the Department of traffic density, regression analysis software with different length of cohesion within the Department of traffic density and traffic flow closed by SPSS Department of formula, using the inductive link part service level division standard total with the convergence of different service level the length of the link and the traffic flow of the total line diagram. Parallel lines in different service levels and the length of the link connections of the total traffic volume of the line diagram can be obtained to link length.
The research results of this paper provide some reference for the revision of urban expressway design specification, and have good practical value.

【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U412.352.1

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