| Summary: | 碩士 === 東南技術學院 === 防災科技研究所 === 96 === The rock slope along Taiwan No.2 Seafront Highway－－ located in northern Taiwan is prone to be fragmentized due to earthquake, wind weathering, orogeny, and sea erosion, etc. Moreover, most part of the roadway is excavated on one-side slope which will incur rockfall under the above circumstances. Therefore, several sections of this highway are classified as high risk areas of rockfall. As a matter of fact, rockfall causes frequent casualties on these sections of roadway according to the past record.
The thesis attempts to explore the hazard risk of a vehicle driving through one of the most hazardous sections of this highway through analyzing the characteristics of the traffic flow. First, the field data is collected according to an experiment design. The χ2 goodness-fit tests are then deployed to check platoon size and vehicle gap size against exponential distribution and Weibull distribution, respectively. Combined with the basic principle of car-following theory, the probability of head-tail collision due to inadequate gap among vehicles is analyzed. Finally, the current hazard mitigation measures for improving rockfall hazard are examined for reference.
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