| Summary: | 碩士 === 國立清華大學 === 工業工程研究所 === 84 === This study intended to investigate the relationship between the
detectibility for cat's eye retroreflective marker on curve
roads at night and the deviation angle of car headlamps. In
addition, the results were used to evaluate whether our CNS
840418 draft fulfill with detectability requirements in real
driving condition. The investigation was conducted on two
simulated curved roads. The curved road was installed with cat'
s eye at 1m apart. The task was to detect the existence of the
target.The experiment consists of left and right turn driving
tasks. Five subjects aged between 20-40, with normal corrected
vision were recruited. Each was experienced driver and drove
his own sedan. The results showed that the deviation angle of
50% detectibility is 31.9 degree (SD = 2.32 degree) in left
turn road and 39.1 degree (SD = 7.2 degree) in right turn road.
Based on these experimental results, the detectability was
converted to detectable threshold. With this threshold, a
required 0.5sec tracking preview time was used to check against
detectability on various radius curved roads. The results
indicated that out CNS 840418 draft was fulfill the
detectability requirements.
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