Given the anticipated increases in highway traffic, the scale and complexity of the traffic infrastructure will continue to
grow progressively in time and in distributed geographical areas. To assure transportation efficiency, safety, and
security in the presence of such growth, it is critical to identify an infrastructure development methodology that can
adapt to expansions while assuring reliable operation for both centralized monitoring and distributed management. In
this paper, a wireless sensor network design methodology is presented, aimed at providing effective distributed
surveillance, anomaly detection, and coordinated response. The proposed methodology integrates state-of-the-art traffic
sensors, with flexibly programmable controller devices that can integrate with the available traffic control equipments.
The system methodology provides a paradigm in which sensors and controllers can be progressively incorporated and
programmed to autonomously coordinate with peer sensors and a hierarchy of controllers to detect, notify, and react to
anomalous events. Since the system can tolerate failure of parts of the system, as the network connectivity continues to
increase, the proposed sensor network will have positive implications on evacuation plans during natural disasters or
terrorist attacks. To illustrate the design methodology and usage, a simulated system along a freeway corridor in South
Carolina was constructed in an integrated microscopic traffic and wireless sensor network simulation platform, in which
distributed incident detection and response functions were implemented. The test results, including detection and false
alarm rates and wireless communication latencies, are analyzed to identify insights of the system's operation and
potential enhancement strategies.
During times of emergency, the proper coordination and communication can save countless lives. To ensure that all proper state agencies, local agencies, and other stakeholders interact in the most efficient way possible during an emergency, an integrated plan must exist. The National ITS Architecture hosts an excellent platform for creating an efficient, integrated program for transportation systems. This architecture also focuses on transportation security. Using a tool such as the National ITS Architecture ensures that a regional security plan will properly coordinate with other regions for possible future integration. Because our transportation system provides vital links for both citizens and goods, its protection and enhancement through improved security can benefit all.
The transportation community has applied sensors for various traffic management purposes, such as in traffic signal control, ramp metering, traveler information development, and incident detection by collecting and processing real-time vehicle position and speed. The U.S. transportation community has not adopted any single newer traffic detectors as the most accepted choice. The objective of this research is to develop an infrared sensor system in the laboratory that will provide improved estimates of vehicle speed compared to those available from current infrared sensors, to model the sensor’s failure conditions and probabilities, and ultimately refine the sensor to provide the most reliable data under various environmental conditions. This paper presents the initial development of the proposed sensor system. This system will be implemented in a highway segment to evaluate its the risks of failure under various environmental conditions. A modified design will then be developed based on the field evaluations.