Cellular automata based design method of circular curve elements of bends of harbor roads

A technology of cellular automaton and design method, which is applied in road transportation emission reduction, calculation, aerodynamic improvement, etc., can solve the problem of fast speed on the road in the port area, and achieve the effect of ensuring comfort

Active Publication Date: 2011-01-12
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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[0005] 2) The speed of the road i

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  • Cellular automata based design method of circular curve elements of bends of harbor roads
  • Cellular automata based design method of circular curve elements of bends of harbor roads
  • Cellular automata based design method of circular curve elements of bends of harbor roads

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[0050]Vehicle type and vehicle speed are important factors in the design of road curve alignment. Due to the particularity of the above two aspects of roads in the port area, they need to be considered in the actual design process. In the plane alignment design of road curves in the port area, three basic alignments are usually used: straight line, circular curve and transitional curve (usually a clothoid). Parameters are reasonably selected. According to the characteristics of road traffic in the port area, the present invention is designed from two aspects of linear proportion combination and linear parameter selection, and proposes a design method for the curved circle curve elements of the special road for port freight based on cellular automata. design framework such as figure 1 As shown, the main steps are:

[0051] 1. Analyze the traffic environment of the road to be designed, road grade requirements, design speed requirements, red line range, vehicle type and proporti...

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Abstract

The invention belongs to the technical field of harbor road design and relates to a cellular automata based design method of circular curve elements of bends of harbor roads. The method comprises the following steps: preliminarily determining the radius ranges and the arc length ranges of the circular curves to be designed; determining the maximum speeds and acceleration and deceleration probability of the vehicles by analyzing the safety and the comfort and treating the safety boundary conditions; establishing a simulation model of the cellular automata, determining the maximum speeds and acceleration and deceleration probability of the vehicles and designing car-following and lane-changing rules of the vehicles; and simplifying the types of the vehicles, converting the types of various vehicles into a single type, simulating the traffics in the harbor districts by changing the radii and the arc length of the circular curves of the bends of the harbor roads according to the established simulation model of the cellular automata, evaluating the simulation result and investigating whether the design scheme can meet the requirement of the traffic capacity. Compared with the traditional method, the design method of the invention has the advantage that the design scheme of the line shapes of the bends in the harbor districts is further consistent with the traffic characteristics in the harbor districts.

Description

technical field [0001] The invention belongs to the technical field of road design in port areas, and in particular relates to a design method for curves in port areas. Background technique [0002] Alignment is the skeleton of the road, and it is an important factor that determines the safety, comfort, economy and traffic capacity of the roads in the port area. Therefore, the alignment design is one of the key factors in the design of the roads in the port area. An important evaluation criterion for the overall design and its design quality. [0003] Due to the special geographical location and functions of the port, the traffic characteristics of the roads in the port area associated with it are different from those of ordinary urban roads, which are mainly reflected in the following aspects: [0004] 1) The proportion of large and medium-sized vehicles in the port area is high. The composition of road traffic vehicles in the port is complex, including passenger cars, co...

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Application Information

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IPC IPC(8): G06F17/50
CPCY02T10/82
Inventor 白子建王晓华刘润有王新岐龚凤刚贺海练象平曾伟周骊巍范晓晖宋涛冯炜程海波张洋段绪斌申婵张国梁李明剑狄升贯王志华苑红凯杨军靳灿章代茂华付晓敦刘超
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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