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DEPLOYMENT OF FIBER-OPTIC LANE USE INDICATION SIGNS USING A DISTRIBUTED CONTROL ARCHITECTURE.
| 题名： | DEPLOYMENT OF FIBER-OPTIC LANE USE INDICATION SIGNS USING A DISTRIBUTED CONTROL ARCHITECTURE. |
| 作者： | Bullock-D; Harvey-A; Messer-C |
| 关键词： | CONTROL-DEVICES; DYNAMIC-TRAFFIC-ASSIGNMENT; FIBER-OPTICS; HOUSTON-TEXAS; LANE-USE-CONTROL-SIGNALS; TRAFFIC-SIGNS-BY-PURPOSE |
| 摘要： | This article reviews the basic signing technologies available to the traffic engineer for dynamically changing sign displays. An example installation of dynamic lane assignment in Houston, Texas, is reviewed and referenced as the motivation for developing a simple traffic signal cabinet interface for dynamic lane assignment signs. The failure modes of these dynamic lane assignment signs are identified so that suitable control models can be selected. Various candidate control architectures are summarized, and a distributed control model is recommended because of the simple cabinet retrofit and the inherent malfunction management capabilities. The article concludes by describing the distributed computing design comprised of the sign-control interface (SCI) residing in each sign. Photographs of the SCI and SCM prototypes are included. |
| 总页数： | Computer-Aided Civil and Infrastructure Engineering. 1999/07. 14(4) pp231-238 (Figs., Refs.) |
| 报告类型： | 科技报告 |
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