01334649

Component

https://doi.org/10.3141/2215-03

http://scholar.google.com...Wang&publication_year=2011

With increasing amounts of data being collected for intelligent transportation systems on arterial networks, the archival, management, and analysis of complex network traffic data have become a challenge. Challenges include inconsistent data connections, data quality control, query performance, traffic prediction, and computational limitations. The web-based RADAR Net system is presented to address these challenges. This system adopts a relational database with link, intersection, and detector entities. Relational data demonstrate its query performance and scalability. The system contains four layers: offline server, online server (middleware), online server (Java Servlet), and online client. This four-layer design successfully distributes the computational burden on the server. To monitor arterial performance, link speeds are calculated directly from loop detector data retrieved in Bellevue, Washington. The system can dynamically predict and smooth real-time loop spot speeds by using an alpha–beta filter (a simplified version of the Kalman filter) while maintaining high system performance. The link speeds of the entire network are calculated and updated in real time. Many application modules (e.g., for capacity analysis and dynamic routing) based on the system architecture have been implemented and have proven the system feasible for performing real-time analysis and assisting decision making.

01352159

11-3922

English

pp 24-36

2011

Transportation Research Record: Journal of the Transportation Research Board

9780309167291

Print

Figures (5) ; Maps (1) ; References (38)

Arterial highways; Client server computing; Decision support systems; Information management; Kalman filtering; Loop detectors; Middleware; Real time information; Relational databases; Spot speed; Traffic data; Traffic speed

Web-based systems

Bellevue (Washington)

Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 17 2011 6:41PM

• Analytic Hierarchy Process and Geographic Information Systems to Identify Optimal Transit Alignments
• Application of IntelliDrive Information System to Enhance High-Speed Intersection Safety
• Comparison of Earthwork Computation Methods
• DRIVE Net: E-Science Transportation Platform for Data Sharing, Visualization, Modeling, and Analysis
• Enterprisewide Information Management System for Transportation Right-of-Way Activities
• Innovative Stereo Vision-Based Approach to Generate Dense Depth Map of Transportation Infrastructure
• Multidimensional Data Mining of Traffic Anomalies on Large-Scale Road Networks
• Protecting Location Privacy: Policy Evaluation
• Seasonal Autoregressive Integrated Moving Average and Support Vector Machine Models: Prediction of Short-Term Traffic Flow on Freeways
• Traveler Information Tool with Integrated Real-Time Transit Information and Multimodal Trip Planning: Design and Implementation
• Uncertainty Issues in Integrating Geographic Information Systems and the Global Positioning System for Transportation