1 A Distributed Ethernet Network of Advanced Pedestrian Signals Submitted by

2 Abstract: For over 60 years, traffic signals have used direct wire connections between the traffic controller cabinet and the signals and detectors dispersed throughout the intersection. This paper reports on a networked based approach for distributed control and sensing of traffic signal devices. The motivation of our research has been to improve safety and performance while reducing the cost of a signalized intersection installation. We present an Ethernet based network architecture that uses NTCIP for real-time signal control that is combined with the IEEE 1588 precision time protocol for robust operation of safety critical applications. Our investigation focuses on improving the accessibility and safety for pedestrians through the use of Smart Signals. The Smart Signals paradigm is the basis of an enabling technology that permits complex functioning signals and detectors with self-test capability. The bi-directional communications provides the ability to monitor the operational status of signals and detectors that are currently unobservable by the automated traffic controls. The elements of network messaging that enable NTCIP to be used for real-time intersection signa