| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 104 === The reflectivity of pavement marking represents its visibility, which not only indicates the effectiveness of marking direclty, but also affects road safety. Luminance Coefficient Under Diffuse Illumination, Qd, and Coefficient of Retroreflected Luminance, RL, are the most commonly seen pavement marking reflection index, where Qd refers to the making visibility during daytime, and RL represents the night visibility of marking.
Fuher more, RL could be subdivided into dry, wet and raining condition. Also, becuase the traffic accidents during nighttime have a higher probability to be fatal, the nighttime marking visibility is more critical, and RL becomes one of the most important evaluating index of pavement marking performance.
However, little specification and research about pavement marking reflectivity performance are done in Taiwan. CNS 15834, published in 2015, was the only standard in Taiwan that metioned marking reflectivity performance, which gave classification of marking performance. Nevertheless, the authority concerned has not established any marking reflectivity performance acceptance criteria which meet the road safety demands.
This research first reviewed and integrated the specification and research related to pavement marking reflectivity performance to know the lack in Taiwan, and then learned about the pavement marking constructing situation through questionnaires and interview with firm of pavement marking. Also, tests and analysis for Qd and RL of marking under dry and wet conditions were made respectively with a portable retroreflectometer to comprehend the existing marking situation in Taiwan. Ultimately, an elementary suggestion of pavement marking construction and maintenance management and nighttime inspector training scheme were given for the authority concerned.
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