| Summary: | 碩士 === 國立交通大學 === 交通運輸研究所 === 89 === Since its initial launch, Tainan Circuit Expressway has been reported of many traffic accidents. In addition to loss of human lives,large social cost also wasted , making it imperative to improve on the traffic safety and reduce the accident rate. Through accident data collection & analysis, this study employ regression analysis method in building an accident predication model to find out the primary accident causes of high accident location and then develop effective improvement proposal for the relevant policy-makers’ reference.
The following conclusions are derived from the results of this study:
1. The accident prone sections on Tainan Circuit Expressway that require design improvement include: (1) junction of Tainan Circuit Expressway and South 133 which recorded high accident rates for running the red light, illegal left turn, not keeping a safe distance; (2) junction of Hsinshih and Hsinchi Expressways which recorded high accident rates for over speeding, not keeping a safety distance and inappropriate lane change; (3) section near Tainan E/W Interchange which recorded high accident rates for over speeding, protective guide rail crashes.
2. The difference in class of highway, expressway and the crossing junctions should not be too great. Where the class are of considerable difference, to reduce the danger of crossing, the two intersecting roadway should be separated in grade to prevent the accident rate.
3. The boundary points of a highway and an expressway should not have at-grade junction, as most pedestrians do not adhere to the relevant law, and often run such red lights that eventually resulted in accidents. If such junction can not be eliminated , additional one or two automatic traffic control signs should be facilitated at 2, 3 kilometers before the junction to remind traffic drivers of approaching a junction.
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