University of California Transportation Center

Intelligent speed adaptation (ISA) has been shown to be an effective measure for road safety improvement. Recently, there has been an increasing interest in using ISA systems, particularly with the dynamic speed control, to manage congestion and reduce energy/emissions. The effectiveness of the dynamic ISA system relies on its speed control strategies. This paper presents the development of a preliminary method to determine control speeds of the dynamic ISA system. The initial results show reasonable control speeds under various levels of freeway congestion as categorized by freeway level of service.