交通标准化
交通標準化
교통표준화
COMMUNICATIONS STANDARDIZATION
2014年
19期
24-27
,共4页
交通工程%占有率-流量模型%跟车模型%混合交通%大型车辆
交通工程%佔有率-流量模型%跟車模型%混閤交通%大型車輛
교통공정%점유솔-류량모형%근차모형%혼합교통%대형차량
traffic engineering%occupancy-flow model%car-following model%mixed traffic flow%large ve-hicle
在交通流基本参数模型中,密度参数难以直接获取,占有率-流量模型具有较强的实用价值。提出占有率分析单元概念,分析混合交通不同跟车组合下,大型车辆混入对分析单元中占有率参数的影响机理,综合分析单元出现概率,得出在占有率-流量模型中,原始占有率难以反映出大型车辆对交通流影响效应的结论,随后基于车头时距和大车率修正原始占有率,最终建立了机动车混合交通情况下的占有率-流量模型,并用北京快速路实测数据对模型进行了检验,证明占有率修正之后,占有率-流量模型更加精确。此模型等式两边都考虑了大型车辆的影响效应,具有更好的实际物理意义。
在交通流基本參數模型中,密度參數難以直接穫取,佔有率-流量模型具有較彊的實用價值。提齣佔有率分析單元概唸,分析混閤交通不同跟車組閤下,大型車輛混入對分析單元中佔有率參數的影響機理,綜閤分析單元齣現概率,得齣在佔有率-流量模型中,原始佔有率難以反映齣大型車輛對交通流影響效應的結論,隨後基于車頭時距和大車率脩正原始佔有率,最終建立瞭機動車混閤交通情況下的佔有率-流量模型,併用北京快速路實測數據對模型進行瞭檢驗,證明佔有率脩正之後,佔有率-流量模型更加精確。此模型等式兩邊都攷慮瞭大型車輛的影響效應,具有更好的實際物理意義。
재교통류기본삼수모형중,밀도삼수난이직접획취,점유솔-류량모형구유교강적실용개치。제출점유솔분석단원개념,분석혼합교통불동근차조합하,대형차량혼입대분석단원중점유솔삼수적영향궤리,종합분석단원출현개솔,득출재점유솔-류량모형중,원시점유솔난이반영출대형차량대교통류영향효응적결론,수후기우차두시거화대차솔수정원시점유솔,최종건립료궤동차혼합교통정황하적점유솔-류량모형,병용북경쾌속로실측수거대모형진행료검험,증명점유솔수정지후,점유솔-류량모형경가정학。차모형등식량변도고필료대형차량적영향효응,구유경호적실제물리의의。
It is difficult to gain density parameter which can be used in traffic flow model, thus occupan-cy-flow model is more practical. The article proposed the conception of analytical unit of occupancy, ana-lyzed the influence mechanism of large vehicle based on different car-following combination considering the probability of analytical unit of occupancy, concluded that original occupancy could not reflect the im-pact of large vehicle on traffic flow and occupancy-flow model. Then the article modified occupancy based on vehicle headway and mixed rate of large vehicle, established occupancy-flow model in mixed traffic flow situation. Data collected from Beijing expressway showed the model in the article was effective and more meaningful.