详情

原文传递 Applying Techniques to Increase Warning of Signals Beyond Vertical Curves.

题名：	Applying Techniques to Increase Warning of Signals Beyond Vertical Curves.
作者：	venglar, s. p. obeng-boampong, k. o.
关键词：	signalized intersections,sight distances,road curves,vertical curves/implementation projects, texas, traffic signals, traffic control, traffic operations, stopping distance, reaction times, warning signs, highway design/department of transportation
摘要：	This implementation project was designed to improve the utilization of the recommendations and findings from TxDOT research project 0-4084, Countermeasures to Reduce Crashes at Signalized Intersections near Vertical Curves. The original research identified the conditions under which motorists approaching a vertical curve could not see ahead with decision sight distance due to the artificial horizon created by the curve. The crest of the curve, in turn, could prevent motorists from seeing a queue of vehicles at a signal beyond the curve, and possibly even the signal itself. Researchers developed guidelines for the type and location of supplemental, advance warning signing to provide advanced motorist notification of this situation during project 0-4084. Providing Texas Department of Transportation staff and other potential users with the guidelines and recommendations of project 0-4084 was the primary goal of the implementation effort. This report thoroughly documents the application of project 0-4084 guidelines to study sites in Austin and Laredo, Texas. Site conditions are described in detail and the complete process of signing and communications design, field installation, and field review is documented. This report is most effectively used in conjunction with implementation product 5-4084-01-P1, a digital video disc (i.e., DVD) that provides video and audio documentation of the site conditions, signing design and application of 0-4084 findings, installation, and results of both field installations. / NOTE: Technical rept. (Sept. 2005 - Aug. 2007). / Supplementary Notes: Sponsored by Texas Dept. of Transportation, Austin. Research and Technology Implementation Office. and Federal Highway Administration, Austin, TX. Texas Div. / Availability Note: 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.
报告类型：	科技报告