| With the popularity of smart phones,people’s reliance on mobile phones is increasing.The phenomenon of ’Phubbers’ can be seen everywhere,and the number of pedestrian injuries caused by this is increasing.Then ’Phubbers’ are also regarded as a kind of ‘people with visual cognitive impairment’.Although there are already many walking safety warning measures to remind pedestrians to pay attention to safety,these measures are not standardized and have not been verified by unified management and scientific research.This paper uses structured questionnaire survey method,dual cognitive task method and visual psychological experiment method to conduct in-depth research on the visual environment compensation measures of ’Phubbers’ walking safety from a visual perspective,which provides reference suggestions for walking environment design.This article explores the characteristics of ’Phubbers’ walking visual perception,and analyzes the root causes of visual cognitive impairment.A method to improve the walking safety of ’Phubbers’ from the perspective of stimulating peripheral vision is proposed.And established ’Phubbers’ walking demand theory,analyzed the ’obstacle’ relationship between ’Phubbers’ and its walking environment.Two technical routes to improve the walking safety of ’Phubbers’ are proposed: from a human perspective and from an environmental perspective.The article extracts 6influencing factors related to visual perception and 2 evaluation indexes of detection ability.The structured electronic questionnaire adopts the evaluation form of the Richter scale,which selects the five indicators of safety,effectiveness,cost,aesthetic appearance,and scalability.Explore the feasibility of the existing 3 types of walking safety warning measures,which are visual environment compensation measures,smart phone technical measures and public management measures.The statistical results of 297 valid questionnaires show that smartphone technical measures are considered to be more effective in improving the safety of ’Phubbers’ pedestrians,while visual environment compensation measures are considered to be easier to promote than the other two types of measures.Therefore,it is more feasible to improve pedestrian safety from the perspective of visual environment compensation.At the same time,the article concludes that effectiveness and aesthetic appearance are the two most important evaluation indicators for judging whether the visual environment compensation measures can be promoted.In order to study the influence of visual environment factors on pedestrian visual perception,this experiment adopts dual cognitive task method and visual psychological experiment method.The ’Phubbers’ walking simulation platform was built in the laboratory to explore the compensation measures for pedestrians in different peripheral visual environments(flash lights,glitter and paint)under different illumination(2lx and 15lx)and different light source types(MH and HPS)Visual perception ability of the reconstructed obstacle,and find out effective visual environment compensation measures.The statistical results of the experimental data of24 subjects under 24 lighting scenarios show that the illuminance,light source type(S/P value),material and color all have a significant influence on the visual perception of ’Phubbers’.By sorting the IES value(an index to measure the average detection rate of obstacles)on the peripheral visual environment compensation measures combination,the ’MH-15LX-blue flashing light’ is obtained as the best visual environment compensation measure combination.This article puts forward the idea of perfecting the compensation measures for the surrounding visual environment,and divides the pedestrian spaces with potential safety hazards into three categories according to the visual behavior characteristics: visual guidance type,visual crossing type and visual hybrid type.Corresponding visual compensation measures are proposed for different types of spaces.To provide a reference for the construction of a safe walking environment in similar scenarios. |
