Research On Highway Tunnel(Group) Traffic Safety Technology And Engineering Measures Considering The Dark Adaptation

With the rapid development of social economy in our country, mountain highway ceaseless and outspread, limited by the terrain and topography, the mountainous area highway to tunnel and tunnel group through the endless mountains. However, tunnel environment brightness of the expressway and general sections of difference larger, in sunny days, inside and outside the tunnel of the luminance difference of up to a few times even a hundred times, driving people to in the tunnel entrance experience strong light dark transition, especially in tunnel group section, the driver should in a short period of time repeatedly experienced alternating light and dark fast conversion, which to driving safety brought great hidden danger.Influence of the tunnel group changes in light and shade on the driving safety of the drivers. In the analysis of tunnel traffic accident distribution based on the morphological characteristics and, from the tunnels lighting environment protection, limiting vehicle running speed and speed limit facility optimization design in-depth study of the highway tunnel traffic safety technology, the specific contents are as follows:Analysis the traffic accidents in Expressway Tunnel Group on the temporal and spatial distribution, and morphology of the traffic accident statistics, aims to find out the main reason of tunnel group of traffic accidents, and then the paper puts forward the tunnel traffic safety technology.Aiming at the shortcomings of the current tunnel lighting design and operation, a detailed analysis of the “highway tunnel lighting design rules”(JTG/T D70/2-02-2014)(hereinafter referred to as the “rules”) and “highway tunnel ventilation lighting design standard”(JTJ 026.1-1999)(hereinafter referred to as the “standard”) according to the “rules” of the difference; and “norms” respectively. The tunnel group of lighting system design, and with the International Association of lighting(CIE) on the relevant provisions to decrease the tunnel entrance and exit of tunnel brightness linear linear brightness were compared; combined with the “rules” from the close to the section of the light, the middle section of the visual security, lighting system dimming control etc. the analysis and summary of the tunnel group road visual environment protection technology.The speed limit of the highway tunnel group can effectively relieve the influence of the light and shade of the tunnel group on the driving safety. First the rate limiting basis and the speed limit way were analysis and comparison; effects of second, taking into account the expressway tunnel group entrance light rapid alternation of the driving safety of the drivers proposed by tunnel group environment itself can provide safe driving conditions, considering driving driving light and dark adaptation to comprehensively determine highway tunnel group section limits; finally, for interval speed minimum length requirements and interval speed and rate limiting value rationality considerations, of Expressway Tunnel Group section interval speed for a reasonable division.The influence of tunnel group entrance light and dark adaptation in the visual concussion phenomenon on the traffic safety, analysis of the tunnel group road speed limit signs on visual recognition and effective, determine the reasonable position setting of tunnel group road speed limit signs.Combined with the actual Pu Xuan expressway tunnel group engineering characteristics, consider driving light and shade adaptation, from tunnel lighting environment protection and speed limits and other presents Pu Xuan expressway tunnel group traffic safety technology and engineering countermeasures.