A SENSE OF PLACE : GPS AND ALASKA RAIL SAFETY
2004; Volume: 15; Issue: 3 Linguagem: Inglês
ISSN
1048-5104
Autores Tópico(s)Transportation Systems and Infrastructure
ResumoThe Alaska Railroad Corporation (ARRC) has implemented the first phases of a collision avoidance system (CAS) that is primarily based on real-time Global Positioning System (GPS) technology and VHF data radio communications. The objective of the system is to improve safety by preventing train-to-train collisions, protecting track maintenance forces, as well as enforcing speed limits. Additionally, the ARRC is focused on improving customer service through reduced transit time and reliable delivery under frequently adverse conditions. In the first phases, the infrastructure that was implemented established the foundation for locomotive onboard applications and dispatcher office applications. In the remaining phases, digital delivery of onboard authority, automatic enforcement of authority limits and speed restrictions, and roadway worker protection will be provided. The article discusses system control, the safety building blocks, data radio network, GPS technology, testing and heuristics, differential correction delivery, and current and future installations.
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