关键词: 交通工程；非机动车饱和混合流；车道基本需求宽度；摆幅；路侧安全净距；速度熵

Abstract: In order to compensate for the lack of consideration of e-bikes in the design of non-motorized vehicle lanes in existing regulations, it is necessary to study the basic demand width of non-motorized vehicle lanes under saturated mixed flow consisting of human-powered bicycles and e-bicycles. Taking the saturated mixed flow of non-motorized vehicles as the research object, starting from the composition of the physical motion width of non-motorized vehicles, the influencing factors of the physical motion width of non-motorized vehicles were analyzed by constructing a multiple linear regression model, and the categorical independent variables were combined and screened. A linear model of non-motorized vehicle speed and running swing and roadside safety clearance under different combination types was established. The conclusion was drawn that the most unfavorable combination was the one consisting of female, elderly and e-bicycles. The physical motion width of non-motorized vehicles under the most unfavorable combination according to 85% running speed of the non-motorized vehicle lane was determined, and then the basic demand width of the non-motorized vehicle lane was determined. A method of using speed entropy to verify the rationality of basic demand width was proposed from the perspective of stability, in response to the accuracy issue of verifying the rationality of non-motorized vehicle lane width. And multiple non-motorized road sections were tested and verified as examples. The research results show that the width of the basic demand of non-motorized vehicle single lane is 1.65m and 1.5m under the isolation fence and marking line, respectively; and the width of the basic demand of non-motorized vehicle two-lane is 2.9m, 2.8m and 2.65m under the green belt, isolation fence and marking line, respectively. Under the same number of lanes and isolation mode, the wider the lane width, the higher the traffic flow velocity entropy. With the increase of the width of non-motorized lane, taking the width of basic demand as the inflection point, the change amplitude in traffic flow velocity entropy of non-motorized vehicle lanes increases, and the stability becomes worse.

Key words: traffic engineering; non-motorized vehicle saturated mixed streams; lane basic demand width; swing; roadside safety clearance distance; speed entropy