| Title | The Research and Development of a Communication Protocol for Urbran Traffic Management-Project Phase II |
| Dept | Transportation Technology and Information Division |
| Year | 2011 |
| Month | |
| Price | |
| Summary | Since 1992, the standardized communications protocol, system software, and signal timing re-formulation plan have been taken by the Ministry of Transportation and Communications (MOTC) to carry out Intelligent Transportation Systems (ITS), which reduce the travel time, the system communication operation and maintenance costs, and provide various real-time integrated traffic information to users, and possess the significant benefits. Simultaneously, in response to promote the coordination and management of freeway, expressway and urban arterials, this study proposes the research of coordinated signal control operations based on center to center (C2C) model including freeway control center to urban traffic control center and urban traffic control center to urban traffic control center. With the intention of reducing the stop delay caused by different road level signal operations, and of providing the accessibility transportation environment to users, this research emphasis the traffic investigation and simulation of testing area, the optimal coordinated signal control models develop the C2C software implementation, C2C scenarios field tests, and the benefit assessment. This project plans the mechanism of data exchange and coordination operation for different level control centers by the optimal coordinated signal control models, the traffic simulations, the expected benefits, and the benefit measurement of traffic quantitative indicators of the testing area. Research results are summarized as follows: To develop the coordinated signal control models, operation process, communications protocol and system software for coordination operation between different control centers. To implement the first time real trial of coordination controls between different control centers. The testing result of southbound off-ramp of Kaohsiung Jiouru interchange indicates that the coordination controls improve the traffic through flow and average queues. The testing result of northbound on-ramp shows that the new ramp metering improves the traffic speed of freeway mainline by slight increase the queue length of urban on-ramp. The testing outcome of Dadu road of Taipei City and Minquan road of New Taipei City illustrates that if attaining the feasible solutions of the optimal coordinated signal control models, it can improve the travel speed and queue length. However, if the feasible solution isn’t found due to insufficient data or abnormal communication, the intersection traffic conditions will be affected because of uncoordinated signal control. |
| Post date | 2012/02/10 |
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