Road curve sight distance checking method based on single-tube double-layer tunnel

Abstract

This invention discloses a method for calculating the sight distance of horizontal curves on roads based on a single-tube double-layer tunnel, comprising the following steps: 1. Obtaining the sight distance value S for all horizontal curve segments of the road. n 2. Calculate the lateral clearance h that a single-tube double-layer tunnel can provide for each horizontal curve segment. n 3. Based on the line element combination of the viewpoint trajectory line and the driving sight distance S of all horizontal curve road segments. n Calculate the maximum lateral clearance h that can guarantee the sight distance for each horizontal curve segment in both the up and down directions of a single-tube double-layer tunnel. max_n 4. The maximum lateral clearance h of each horizontal curve segment. max_n With the corresponding lateral clearance h n The comparison is performed to determine whether the sight distance requirements for the corresponding horizontal curve sections are met and guaranteed; 5. For each horizontal curve section that does not meet the sight distance requirements, measures such as widening the road shoulders are taken to ensure that the sight distance requirements for the horizontal curve sections are met. This invention improves the accuracy of horizontal curve sight distance calculation and has a greater role in reducing driving risks.

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