Study Of Interchange Ramp Alignment Design And Evaluation Based On Safe Driving

Ramp alignment design reasonable directly related to whether the interchange for safe operation of the fundamental problems. ramp alignment must satisfy the automobile driving mechanics requirements, in the interchange design, not only should consider ramp forms of choice, more attention to alignment index of the rational selection and appropriate combination,to ensure the consistency of ramps form and the continuity of alignment, to meet the safe driving car in ramp needs.Based on the analysis of traffic characteristics, traffic capacity and design speed, according to the characteristics of ramp alignment, summarizes the key points in the interchange ramp alignment design based on safe driving, discusses the interchange ramp alignment design in common problems and given some design methods and safety measures, In order to guide ramp alignment design, as a ramp alignment index safety evaluation theoretical basis.Through the analyss ramp alignment design points and common problems based on safe drving, and fully contrast on the basis of existing research results, the selection of evaluation indexes of complement and improvement, established a kind of based on hierarchical quantitative interchange ramp alignment weighted safety evaluation index system with speed continuity as the core. Discusses the structure hierarchy and proportion relation of the evaluation system, put forward the calculation model and the standard of appraisal, given the interchange ramp alignment safety evaluation methods and steps, puts forward quantitative interchange ramp alignment safety evaluation composite index—Ramp Alignment Safety Index.Based on the actual interchange design project alignment safety analysis and evaluation ramps proved in this paper, alignment safety evaluation system overpass ramp the feasibility and rationality, but for the interchange ramp alignment design provides the theory basis for insufficient and feedback.