原文传递
Development of Advance Warning Systems for End-of-Green Phase at High Speed Traffic Signals. Research rept. Sep 01-Aug 03.
| 题名： | Development of Advance Warning Systems for End-of-Green Phase at High Speed Traffic Signals. Research rept. Sep 01-Aug 03. |
| 作者： | Messer-C.J.; Sunkari-S.R.; Charara-H.A.; Parker-R.T. |
| 关键词： | *Traffic-signals; *Warning-systems.;Traffic-control-device; Texas-; Traffic-actuated-controls; High-speed; Highways-; Design-; Traffic-safety; Rural-areas. |
| 摘要： | This report describes a research study that developed an effective advance warning for end-of-green phase at high-speed (greater than or equal to 45 mph) traffic signals in Texas. This report contains the research conducted, hardware developed, and field testing performed of the Advance Warning for End-of-Green System (AWEGS) designed by the Texas Transportation Institute for the Texas Department of Transportation (TXDOT). Two companion reports present guidance on the design, installation, and operation of AWEGS. A series of advance warning technologies were tested over the two-year study. A base Level 1 technology was initially proposed using 'trailing overlaps' to provide a fixed amount of advance warning of the end-of-green phase, but this method was rejected because it gave up existing dilemma zone protection. A new Level 1 technology, using average speed while still predicting when the traffic-actuated controller would gap-out, was substituted. More advanced AWEGS technologies (Level 2) added vehicle typing (car, truck) and individual speed measurement to better estimate when the signal controller would gap-out. AWEGS was field tested at two sites in Waco and Brenham, Texas. The Waco site was a high-speed, two-lane rural road. The second site was a high-speed four-lane divided highway located on the US 290 bypass of Brenham, Texas. |
| 报告类型： | 科技报告 |
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