A Method of Establishing the Visible Area Model of Curve Signs on Expressway

Abstract

The invention discloses a highway curve sign visual domain model. First, the visual domain of the sign is defined, and the basis for judging that the visual domain is blocked is proposed; secondly, a geometric model is constructed for the visual process of the highway curve marker , and deduced the calculation equation of the visual domain; finally, the calculation and analysis of the Hunan section of the Beijing-Hong Kong-Macau Expressway was carried out with the created visual domain model, and the results verified the correctness and effectiveness of the model. The visual area model of the expressway curve sign of the present invention provides a design basis for the setting of the expressway curve sign, the planting of plants, the scope of highway land acquisition, etc., and provides a reference for effectively solving the problem that the visible area of ​​the expressway curve sign is blocked .

Description

technical field [0001] The invention belongs to the technical field of highway engineering, and in particular relates to a visual domain model of an expressway curve sign. Background technique [0002] With the continuous development of expressway construction in our country, the mileage of highways has increased mainly in the mountainous areas in the west in recent years. Expressways in hilly areas are affected by complex terrain and landforms, and circular curves play a pivotal role in the alignment of expressways, thus forming many curves and most of them have blocked sightlines. Roadside plants, slopes, soundproof walls, etc. block signs, which have a certain impact on the recognition and reading of traffic signs, resulting in insufficient reading time for drivers, insufficient reading, and even wrong reading information, resulting in operating Mistakes or misjudgments can lead to traffic accidents such as rear-end collisions, rollovers, and collisions. [0003] After ...

AI Technical Summary

Problems solved by technology

Expressways in hilly areas are affected by complex terrain and landforms, and circular curves play a pivotal role in the alignment of expressways, thus forming many curves and most of them have blocked sightlines. Roadside plants, slopes, soundproof walls, etc. block signs, which have a certain impact on the recognition and reading of traffic signs, resulting in insufficient reading time for drivers, insufficient reading, and even wrong reading information, resulting in operating Mistakes or misjudgments, resulting in rear-end collisions, rollovers, collisions and other traffic accidents

[0003] After summarizing and analyzing the domestic and foreign research on sign occlusion at curves, it is found that the current research on sign occlusion at bends at home and abroad has the following limitations: At present, most of the research on expressway traffic signs is devoted to sign occlusion. In terms of visibility, layout design, etc., there are still deficiencies based on the influence of occlusion on signs; there are many studies on the occlusion probability of signs by vehicles in the same direction, and some dynamic occlusion probability models have been established, but these occlusion models only solve the problem. The problem of vehicles in the same direction blocking the sign, and the sign is affected by many factors in the actual blocking process, such as the setting of the highway curve sign, planting, slope ratio of the roadside slope, and the location of the sound insulation wall, etc. lead to signs be blocked, and thus become an accident hazard

Images