United States Department of Transportation
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Building the Vision, a Series of AZTech ITS Model Deployment Success Stories for the Phoenix Metropolitan Area: Number Ten: High-Tech Transit, Using State-Of–The Art Technology to Keep Bus Riders Informed
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1998-01-01
[PDF-26.86 KB]
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DOI:5774
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NTL Classification:NTL-PUBLIC TRANSPORTATION-Bus Transportation;NTL-PUBLIC TRANSPORTATION-PUBLIC TRANSPORTATION;NTL-INTELLIGENT TRANSPORTATION SYSTEMS-INTELLIGENT TRANSPORTATION SYSTEMS;
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Abstract:Traditionally, the biggest problem experienced by transit riders is a lack of information. They may not have access to a bus schedule. Or, even if they do have a copy of the Bus Book, they have no way of knowing if their particular bus is on schedule and if it's not on schedule, there's no system for letting them know when it might arrive. In a metropolitan area the size of the Valley of the Sun, buses are as prone to delays caused by incidents and congestion as any other vehicle. And without access to timely, accurate roadway information, bus drivers are limited in their ability to stay on schedule. For AZTech, the key to providing accurate, comprehensive bus data is a technology called the Automatic Vehicle Locator (AVL). More than 90 buses in the Valley have been equipped with AVL systems that employ Global Positioning Systems. The majority of these buses are used on four major regional transit routes that run through Phoenix, Tempe, Mesa and Scottsdale. Frequent AVL transmissions identify each bus, its location and the time. AZTech computers compare this information with the bus schedule and extrapolate when the bus should arrive at its scheduled stops. This information is then relayed to computerized LED message boards at bus stops. The message board immediately displays the location and expected arrival time of the bus.
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