关键词: 交通工程, 功能区面积, 交通冲突, 出入口, 摄影测量法, 大型公建

Abstract:

To quantify the vehicle access traffic impact area of large public buildings, assuming access rightturn traffic conflict area as its downstream functional area, traffic impact characteristics of access downstream functional area size are analyzed. Further, with following right- turn vehicle location in traffic conflicts taken as the right- turn conflict distribution point, access right- turn conflict distribution point real coordinate formulas based on the photogrammetry method are proposed, in order to measure the right-turn conflict area. Then through curve fitting right-turn conflict coordinate points, boundary points of right-turn conflict area are defined, so that the access downstream functional area size model is determined. Finally, one large public building vehicle access is taken as an example for result trial calculation and simulation validation. Verification results show that, urban street traffic delay in the access downstream functional area has the large value, and delay values have rapid increase and slow decrease changing states successively, which fits the right- turn conflict area shape and size features. Therefore access functional area size model based on the right-turn conflict area shape could define the large public building access impact area, which is good for urban street microscopic traffic organization optimization.

Key words: traffic engineering, functional area size, traffic conflict, access, photogrammetry method, large public building