Method for Determining Characteristic Parameters of Tunnel Entrance and Exit Alignment Consistency in Dynamic Driving Environment

Abstract

The method for determining the linear consistency characteristic parameters of the tunnel entrance and exit under the dynamic driving environment includes the following steps: 1. Divide the two parts of the tunnel entrance and exit connection section and the tunnel entrance and exit into several sections on average with the entrance and exit as the origin respectively, 2. measure each section Illumination changes before and after in day and night environments 3. Calculate the headway T(L) between the two vehicles, 4. Calculate the average passing time 5. Select the maximum value tmax, 6. Calculate the initial linear consistency time T ", 7. Calculate the final linear consistency characteristic parameters. (This patent) effectively coordinates the "people-vehicle-road-environment" traffic operation system, determines the linear consistency time of the tunnel entrance and exit based on the safety time distance model, and considers the driver's visual characteristics On the basis of ensuring the linearity of driving requirements, ensuring driving safety, improving the accuracy of tunnel design standards and construction requirements, ensuring safe and smooth passage of drivers, and reducing the incidence of safety accidents.

Description

Technical field [0001] The invention relates to a method for determining the linear consistency characteristic parameters of the entrance and exit of a tunnel. Background technique [0002] With the rapid growth of highway mileage in recent years, especially the continuous extension of highways to mountainous areas, the number of highway tunnels is increasing due to the limitation of terrain. The special environment where the tunnel is connected to other road units leads to a high incidence of tunnel entrance and exit accidents. The consistent linear performance of the tunnel entrance and exit ensures the safety and driving comfort of the transition. At the same time, it has certain theoretical significance and practical value for the adaptation of the transition environment. [0003] Through the search, it is found that the current domestic relevant regulations have special requirements for the consistency of the tunnel entrance and exit, and the tunnel-related patents are concent...

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Problems solved by technology

[0006] To sum up, no matter the published patents or the published research results, there is a lack of research on the headway model of the tunnel entrance and exit, and then the linear consistency is only mechanically stipulated as a fixed time, which not only does not It can reflect the academic integrity of this aspect, and more importantly, it is difficult to scientifically guide engineering practice, let alone effectively reduce traffic accidents at tunnel entrances and exits

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