A design method of line-of-sight guidance system at the entrance of low-grade highway tunnel

Abstract

The invention relates to the technical field of highway tunnel sight guidance, in particular to a design method for a low-grade highway tunnel access sight guidance system. The design method is characterized in that according to the special environment characteristic that turnouts are connected outside a tunnel and the driver sight characteristics, turn-by-turn differential design is conducted, specifically, a multistage tunnel guidance system, a multistage tunnel light turning-on system, a tunnel lane changing prohibiting system, an intersection marked line system and an intersection guidancesign system are organically combined to constitute a set of complete and continuous low-grade highway tunnel access sight guidance system. According to the design method for the low-grade highway tunnel access sight guidance system, the problem that the sight distance and the visual area at an access are insufficient is effectively solved; the traveling sight environment in the tunnel is improved, transition of the sight inside the tunnel and the sight outside the tunnel is effectively connected, and the speed sense, the distance sense, the direction sense and the position sense of a driver are improved; and the traveling environment of a low-grade highway tunnel multiple-turnout-connected road segment at a rural-urban fringe zone is optimized.

Description

technical field [0001] The invention relates to the technical field of sight guidance for highway tunnels, in particular to a design method for a sight guidance system at the entrance of a low-grade highway tunnel. Two-way two-lane low-grade road tunnel at the urban-rural junction. Background technique [0002] my country's highway tunnels are developing rapidly, and most of them are short and medium tunnels, and the accident rate in tunnel sections is high. According to the Statistical Bulletin on the Development of the Transportation Industry in 2017, there are 16,229 highway tunnels across the country with a total length of 15.2851 million meters, an increase of 1048 with a total length of 1.2454 million meters. According to relevant survey results by domestic scholars, the accident rate of tunnel section accidents is 1.3~9.67 times that of the whole line, with an average of 5.17 times. [0003] There is a lack of lighting standards for low-grade highway tunnels, and th...

AI Technical Summary

Problems solved by technology

Because the low-grade road tunnels have no lighting facilities or low turn-on rate, and there are few induction facilities in the tunnels, the visual environment of the tunnels is poor. The visual environment is not good, the visual distance is seriously insufficient, and the main and secondary road rights are not clear, which greatly affects the normal operation of the main road traffic flow and easily leads to traffic accidents

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