United States Department of Transportation
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Denver RTD's computer aided dispatch/automatic vehicle location system : the human factors consequences
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1999-09-01
[PDF-5.64 MB]
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Edition:Final report Nov 1998-Aug 1999
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Abstract:This report documents what happened to employees' work procedures when their employer when their employer installed Computer Aided Disptach/Automatic Vehicle Locator (CAD/AVL) technology to provide real-time surveillance of vehicles and to upgrade radio communication. Denver's REgional Transportation District (RTD) acquired a CAD/AVL system and installed it system-wide. The Operator Performance and Safety Analysis Division, DTS-79, at the U.S. Department of TRansportation's Volpe National Transportation Systems Center (Volpe Center), performed this research with the support of the Federal Transit Administration's (FTA) Adavnced Public Transportation Systems (APTS) Program. The analyses examined the usability of the CAD/AVL features and how CAD/AVL affected the employees' work tasks. Employees' responsibilities remained the same but theyr eceived additional information. Dispatchers transmit and receive more calls. Street supervisors' duties have expanded but their staffing level is unchanged. us operators use new communication procedures but, initiallly, expressed discomfort with the surveillance capability. RTD can better manage their transit operations because the CAD/AVL system reduces the time they need to respond to incidents in the field.
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