Abstract:According to the relevant research and reports in recent years, the urban traffic problems caused by the unreasonable speed restriction are common in China, especially in some high-grade roads. Some sections with the good traffic conditions often lead to the waste of road resources due to low speed restriction. At present, in some large and medium-sized cities of China, such as Chengdu and Xiamen, the relevant research and practice on the adjustment of speed restriction are carried out, and good efficiencies are achieved. But in the most cities, the problem of unreasonable speed restriction is still common. How to formulate the speed restriction scientifically and reasonably is still an important subject of the urban traffic operation and management. In order to reasonably formulate the speed limit value of urban road and improve the road efficiency and traffic safety, relying on Zhoushan City Binhai Avenue Project, after the investigation and survey of each road section operation speed, and based on the theoretical calculation method of highway speed limit design, the optimization adjustment scheme of the speed limit value is determined, and the existing problems of taking the design speed as the speed limit value and the theoretical basis of taking the 85% percentile speed as the speed limit value of urban road are verified.
