占用车行道的路内停车泊位设置条件

Setting condition of on-street parking space occupied vehicle lane

为了给占用车行道的路内停车泊位设置提供参考依据,通过开展路内停车干扰条件下城市道路路段交通流参数调查,分析给出了小客车饱和车头时距随路内停车数量变化的规律,采用SPSS统计分析软件分别构建了间隔车道、邻近车道的饱和车头时距与小客车在路内停车数量的关系模型。基于所建理论模型,给出了设置路内停车泊位的邻近车道和间隔车道机动车交通量阈值的建议,并进行了实例验证。研究结果表明:随着路内停车数量的增加,邻近车道和间隔车道的小客车饱和车头时距均增加,且满足二次函数关系;路内停车数越多且设计速度越高,该道路实际通行能力的路内停车数量的修正系数越小,说明其越不宜设置路内停车泊位;在路内停车数量相同的情况下,间隔车道的修正系数若大于邻近车道,说明路内停车对该路间隔车道的交通运行影响要小于邻近车道。

In order to provide reference for setting on-street parking space that occupies vehicle lane,traffic flow parameters survey was conducted under the interruption of on-street paring.The changing rules of cars’saturated headway with the number of on-street parking cars were analyzed.The models between the saturated headway with the number of on-street parking cars on adjacent lane and interval lane were established respectively using SPSS software.Based on established models,suggested thresholds of traffic volume for adjacent lane and interval lane were given to set on-street parking lot,and case study was conducted.It shows that cars′saturated headway on adjacent lane and interval lane increases with the number of on-street parking cars and there are quadratic function relations between them.With the increase in the number of on-street paring cars the road design speed increases,and the adjustment factor decreases for possible capacity,so the setting of on-street parking lot is more improper.When the number of on street parking car is the same,adjustment factor for possible capacity of interval lane is larger than that of adjacent lane,so the influence of on-street parking on traffic operation of interval lane is less than that of adjacent lane.