CAJ | 학술논문

对于机动车左转流量较大的交叉口，利用时空结合方法设置可变车道是提高城市道路交叉口左转通行能力的一种重要途径。文章根据可变车道的设置依据、设置条件及行驶规则，构建了信号交叉口可变车道左转通行能力的计算模型以及左转通行能力优化模型，通过微观仿真对模型进行了验证。结果表明：可变车道对交叉口左转通行能力的影响显著，左转通行能力的模型计算与仿真结果平均误差为4.1%，与实际通行能力接近；可变车道长度与有效绿灯时间是影响可变车道左转通行能力主要因素；通过优化模型可以得到最佳可变车道长度和有效绿灯时间，结合实际调查数据，得到经十路和舜耕路交叉口高峰期最佳左转有效绿灯时间为28 s，平峰期最佳左转有效绿灯时间为35 s。
대우궤동차좌전류량교대적교차구，이용시공결합방법설치가변차도시제고성시도로교차구좌전통행능력적일충중요도경。문장근거가변차도적설치의거、설치조건급행사규칙，구건료신호교차구가변차도좌전통행능력적계산모형이급좌전통행능력우화모형，통과미관방진대모형진행료험증。결과표명：가변차도대교차구좌전통행능력적영향현저，좌전통행능력적모형계산여방진결과평균오차위4.1%，여실제통행능력접근；가변차도장도여유효록등시간시영향가변차도좌전통행능력주요인소；통과우화모형가이득도최가가변차도장도화유효록등시간，결합실제조사수거，득도경십로화순경로교차구고봉기최가좌전유효록등시간위28 s，평봉기최가좌전유효록등시간위35 s。
In the left-turn intersection with large traffic flow,it is an important way to improve the capacity using the method of set a variable lane combined with space and time. In this paper,the condition and traffic rules of variable lane are analyzed firstly. Then,the variable lane traffic capacity model and optimization model of left-turn is presented and moreover verified by simulation. The results indicate that the deviation between calculated result and simulated result is 4 . 1%. Variable lane is significant to improve the left-turn capacity. Furthermore,both the length of variable lane and effective green time are the main influence factors of variable lane capacity. According to the proposed model,we can find the optimal length of variable lane and effective green time so as to get the maximum left-turn capacity. Finally,by combining the real data of intersection in Jingshi Road and Shungeng Road,the optimum effective green time in peak hour is changed to 28 s and the optimum effective green time in average hour is changed to 35 s.