CAJ | 학술논문

通过分析高速公路平纵线形指标与事故率的关系，引入线形影响因子，提出了基于线形影响因子的高速公路基本路段安全评价方法。首先，应用回归分析的方法，确定了平曲线半径、平曲线偏角、直线段长度、竖曲线半径及纵坡坡度与事故率的关系，在此基础上分析了弯坡组合、平竖曲线组合以及长大坡组合路段上的事故率。进而，结合事故率与线形的关系，以线形影响因子表征几何线形指标对高速公路事故率的影响，据此评价高速公路的行车安全性。案例分析结果表明，基于线形影响因子确定的危险路段与由实际事故率确定的危险路段具有极高的一致性，达到了81％。
통과분석고속공로평종선형지표여사고솔적관계，인입선형영향인자，제출료기우선형영향인자적고속공로기본로단안전평개방법。수선，응용회귀분석적방법，학정료평곡선반경、평곡선편각、직선단장도、수곡선반경급종파파도여사고솔적관계，재차기출상분석료만파조합、평수곡선조합이급장대파조합로단상적사고솔。진이，결합사고솔여선형적관계，이선형영향인자표정궤하선형지표대고속공로사고솔적영향，거차평개고속공로적행차안전성。안례분석결과표명，기우선형영향인자학정적위험로단여유실제사고솔학정적위험로단구유겁고적일치성，체도료81％。
A safety evaluation method for freeway segments is proposed in this study by analyzing the relationship between crash rates and road geometric alignment.First,the relationship between crash rates and road geometric features including radius of horizontal curves,deflections of horizontal curves,length of tangents,radius of vertical curves,longi-tudinal gradient is analyzed through linear regression.Then,the relationship between a combination of different alignment features and crash rates is studied.Further,the alignment factors analyzed over the first two steps are used to evaluate the impacts of geometric alignment features on crash rates and the method is then proposed to evaluate the safety of freeway. The results of a case study indicated that up to 81% of"dangerous highway sections" identified by proposed method are confirmed by the crash data.The proposed highway safety evaluation method is practical to identify collision prone sec-tions of freeways.