交通信息与安全
交通信息與安全
교통신식여안전
Journal of Transport Information and Safety
2015年
4期
113-118
,共6页
交通工程%城市道路%行人立体过街设施%机动车流率%行驶车速%过街行人流率
交通工程%城市道路%行人立體過街設施%機動車流率%行駛車速%過街行人流率
교통공정%성시도로%행인입체과가설시%궤동차류솔%행사차속%과가행인류솔
traffic engineering%urban road%grade separated pedestrian crossing facilities%traffic volumes%speeds%pedestrian volumes
为合理设置路段行人立体过街设施,保障过街行人安全,对某双向6车道主干路无信号人行横道处的过街行人等待时间、交通冲突时间及行驶车速进行了视频观测。定义了机动车流消散时间计算公式,根据调查获取的过街行人忍受等待时间阈值,给出了设置路段行人立体过街设施的机动车流率条件。基于调查数据,采用回归分析法构建了交通冲突时间与行驶车速的关系模型,依据安全行车所需满足的制动距离与冲突距离的关系,给出了设置路段行人立体过街设施的行驶车速条件。依据计算得到的信号控制人行横道设计通行能力,给出了设置路段行人立体过街设施的行人流率条件。研究结果表明,当机动车高峰时段每个信号周期内任意1个行驶方向机动车流消散时间大于60 s,或行驶车速大于50 km/h,或过街行人流率大于2200人/(hg·m)时,应考虑设置路段行人立体过街设施。
為閤理設置路段行人立體過街設施,保障過街行人安全,對某雙嚮6車道主榦路無信號人行橫道處的過街行人等待時間、交通遲突時間及行駛車速進行瞭視頻觀測。定義瞭機動車流消散時間計算公式,根據調查穫取的過街行人忍受等待時間閾值,給齣瞭設置路段行人立體過街設施的機動車流率條件。基于調查數據,採用迴歸分析法構建瞭交通遲突時間與行駛車速的關繫模型,依據安全行車所需滿足的製動距離與遲突距離的關繫,給齣瞭設置路段行人立體過街設施的行駛車速條件。依據計算得到的信號控製人行橫道設計通行能力,給齣瞭設置路段行人立體過街設施的行人流率條件。研究結果錶明,噹機動車高峰時段每箇信號週期內任意1箇行駛方嚮機動車流消散時間大于60 s,或行駛車速大于50 km/h,或過街行人流率大于2200人/(hg·m)時,應攷慮設置路段行人立體過街設施。
위합리설치로단행인입체과가설시,보장과가행인안전,대모쌍향6차도주간로무신호인행횡도처적과가행인등대시간、교통충돌시간급행사차속진행료시빈관측。정의료궤동차류소산시간계산공식,근거조사획취적과가행인인수등대시간역치,급출료설치로단행인입체과가설시적궤동차류솔조건。기우조사수거,채용회귀분석법구건료교통충돌시간여행사차속적관계모형,의거안전행차소수만족적제동거리여충돌거리적관계,급출료설치로단행인입체과가설시적행사차속조건。의거계산득도적신호공제인행횡도설계통행능력,급출료설치로단행인입체과가설시적행인류솔조건。연구결과표명,당궤동차고봉시단매개신호주기내임의1개행사방향궤동차류소산시간대우60 s,혹행사차속대우50 km/h,혹과가행인류솔대우2200인/(hg·m)시,응고필설치로단행인입체과가설시。
In order to set grade separated pedestrian crossing facilities reasonably on urban road sections and ensure the safety of crossing pedestrians,the video observation method was used to obtain the waiting time of crossing pedestri-ans,traffic conflicting times and driving speeds at an un-signalized crosswalk on an arterial road with two-way six lanes. Calculation formula of vehicle dispersing time was proposed,and the warrant of traffic volumes was defined for grade sep-arated pedestrian crossing facilities according to investigated threshold value of crossing pedestrians′ tolerable waiting time.Based on observed data,regression method was applied to establish relationship model between pedestrian-vehicle traffic conflicting times and vehicle driving speeds.The warrant of driving speed for grade separated pedestrian facilities was determined based on the relationship between stopping sight distances and the width of conflict zones.The warrant of pedestrian volumes was defined by calculated design capacity of signalized crosswalks.The results show that grade separa-ted pedestrian crossing facilities are warranted when vehicles’dispersing time of any direction is more than 60 s during one cycle in peak hour,or driving speed is more than 50 km/h,or crossing pedestrian volume is more than 2 200 person/(hg·m).
