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原文传递 TravTek Global Evaluation and Executive Summary

题名：	TravTek Global Evaluation and Executive Summary
作者：	V. W. Inman, J. I. Peters
关键词：	TravTek, ATIS, ATMS, IVHS, ITS, Evaluation
摘要：	TravTek was an operational field test of an advanced traveler information systems (ATIS) and advanced traffic management systems (ATMS) technologies. This paper summarize.*; the findings from the series of studies that constituted the TravTek evaluation. Two field studies, three field experiments, and four analytical studies are summarized. The Rental User Study and Local User Study were naturalistic field studies of the use of the TravTek system by rental drivers and high-mileage local area residents respectively. The Yoked Driver Study, Orlando Test Network Study, and Camera Car Stu^ woe field experiments that empirically assessed the in-vehicle TravTek subsystem with respect to measures of performance that included trip planning time, travel time, subjective workload, wrong turns, glance location, and glance duration. The Modeling Study extrapo lated expected system performance from field studies and experiments for various levels of market penetration, traffic conditions not observed in the field, and measures of performance not directly measured in the field. The Modeling Study projected effects on fuel consumption, vehicle emissions, accident risk, and other measures for market penetration levels of 1 to 100 percent. The Safety Study reviewed and integrated safety-related statistics across all TravTek studies and expanded on Modeling Study methods to project safety benefits. The Architecture Study thoroughly documented the TravTek system and evaluated system components that included: communications, data bases, hardware software, and system staffing. Study results showed that the TravTek system was reliable. The distributed information processing system was found to be viable. The system helped drivers save substantial trip planning and travel time. It also was effective in helping drivers avoid congestion Both visitors and local users used the system frequently, and provided a median estimate of the value of the System in a new car of about $1000. The tum-by-tum Guidance Display and Voice Guide were very well received, Visitors and local users used these features for the majority of their trips, and results of field experiments suggest that the Guidance Display and Voice Guide yielded improved driving and navigation performance over navigating to unfamiliar destinations by conventional means. The Safety Study showed that the system was safe, and suggested a small safety benefit for a fully deployed system. The Modeling Study findings suggest that a TravTek system would benefit not only system users, but also non-equipped vehicles that share the road with system users. The TravTek operational test was a success. The TravTek evaluation demonstrated that users found the system useful, easy to use, and safe. Field experiments showed that the system reduced trip planning and travel time, and improved driving and navigation performance. System users indicated that they were willing to pay for a system such as the one they drove during the operational test.
报告类型：	科技报告