Analysis of obstacle perception distance by road lighting condition depending on obstacle reflectivity
Journal Title: International Journal of Engineering and Science Invention - Year 2017, Vol 6, Issue 12
Abstract
For the sake of the driver’s safety, appropriate road luminance andluminance contrast shall be provided through road lighting so as to be able to identify the alighment change and obstacle at a certain distance.The brigher the road surface the betetr the visibility to recognize the alighment change by the driver. But whether to identify the risk such as the obstacles ahead is determined by the difference in brightness between the road surface abd obstacle (luminance contrast) Luminance contrast caries deoending on bilateral symmetry, light distribution method such as probea and counter beam and the height of light source such as pole lighting and low-mounted road ligthig. This studyis intended to identify the obstacle sighting distance through the road test with probeam, low-mounted road lighting, pole lighting with symmetric light distribution and headlight (low & high beam) and furthermore, evaluate the visibility by comparing the performance of luminance contrast by type of lighting. As a result, when it comes to pole lighting, the higher the obstacle reflectivity the shorter the obstacle sighting distance but the longer the obstacle sighting distacne in case of the low-mounted road lighting. When driving with high beam lighting and low beam ligting on road without lighting facilities, the higher the obstacle reflectivity the longer the obstacle sighting distance in proportion. .
Authors and Affiliations
Wonbum Cho
Keywords
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