標題: | Stochastic modeling of the dynamics of incident-induced lane traffic states for incident-responsive local ramp control |
作者: | Sheu, Jiuh-Biing 運輸與物流管理系 註:原交通所+運管所 Department of Transportation and Logistics Management |
公開日期: | 1-Dec-2007 |
摘要: | Incident-induced traffic congestion has been recognized as a critical issue to solve in the development of advanced freeway incident management systems. This paper investigates the applicability of a stochastic optimal control approach to real-time incident-responsive local ramp control on freeways. The architecture of the proposed ramp control system embeds two primary functions including (1) real-time estimation of incident-induced lane traffic states and (2) dynamic prediction of ramp-metering rates in response to the changes of incident impacts. To accomplish the above two goals, a discrete-time nonlinear stochastic optimal control model is proposed, followed by the development of a recursive prediction algorithm. Based on the simulation data, the numerical results of model tests indicate that the proposed method permits relieving incident impacts particularly under low-volume and medium-volume conditions, relative to high-volume lane-blocking conditions. Particularly, the incident-induced queue lengths can be improved by 50.1% and 67.9%, compared to the existing ramp control and control-free strategies, respectively. (c) 2007 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.physa.2007.08.005 http://hdl.handle.net/11536/10087 |
ISSN: | 0378-4371 |
DOI: | 10.1016/j.physa.2007.08.005 |
期刊: | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS |
Volume: | 386 |
Issue: | 1 |
起始頁: | 365 |
結束頁: | 380 |
Appears in Collections: | Articles |