关键词: 商业中心区, 行驶车速, 货运交通, 交通流模型

Abstract: This paper analyses the freight conditions in the commercial central area, summarizes the freight operating rule and the parking rule, and then studies the influence of the allocation freight activities on road running speed. The conclusion indicates that the freight volume, the number of parking and the parking time in the commercial central are the main factors influencing road running speed. The paper further separately establishes the model of mixed travel flow of allocation vehicles and the social vehicles on the main and branch road in the business central area, as well as the characteristic function of flow which include freight vehicles in the commercial central area. In the end, this paper provides the reference for correctly analyzing the moving status of vehicles, reasonably judging the road travel time of vehicles and computing route travel time of allocation vehicles, and so on.

Key words: central commercial district, road speed, freight transportation, model of mixed travel flow