详情

原文传递 Effects of Urban Street Environment on Operating Speeds.

题名：	Effects of Urban Street Environment on Operating Speeds.
作者：	dixon, k. k. hunter, m. p. wang, j. boonsiripant, s. wu, s.
关键词：	environmental effects, arterial highways, traffic safety, driver characteristics, transportation corridors, traffic flow, highway design, model development, data collection
摘要：	Speeds on low-speed urban arterials often exceed their intended operating speeds resulting in potential safety problems since speed is directly related to crash severity, especially for pedestrian-involved crashes. This research develops and calibrates a method for estimating operating speeds based on drivers' perceptions of design features, environmental factors, and operational conditions on low-speed urban roadways. The operating speed model development includes the selection of study corridors that represent comprehensive urban street characteristics, the collection of supplemental data, and statistical model development. This report also includes a review of existing speed models and modeling techniques, common methods used to evaluate driver's perception of the road environment, and possible factors that may influence a driver's speed choice. Low-speed urban streets, as defined in this research, include urban local streets, collectors, and arterials with speed limits less or equal to 45 mph. This study utilizes one year (2004) of data from the Commute Atlanta project, where drivers in the Atlanta, Georgia region freely drove their personal vehicles equipped with data collection equipment. Speed data for free-flow conditions, however, is not straightforward since there is no clear way to determine if a vehicle is operating under free-flow conditions. As a result, this project also includes the development of an extensive free-flow speed filter process. Mixed models are utilized for the estimation of speed conditions. / Availability Note: Available on CD-ROM and in color paper copy only. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0809；156p
报告类型：	科技报告