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Formal evaluation of the ADVANCE targeted deployment
Technical Paper
1996-16-0019
Sector:
Language:
English
Abstract
The Advanced Driver and Vehicle Advisory Navigation Concept
(ADVANCE) advanced traveler information system (ATIS) demonstration
project in northeastern Illinois was re-scoped in late 1994 from
its originally-planned deployment of 3,000 - 5,000 in-vehicle
navigation units to a so-called "targeted" deployment in
which up to 75 vehicles were equipped with devices enabling them to
receive real-time traffic information. These devices included 1)
global positioning system (GPS) transmitters/receivers that enabled
the vehicles while in the ADVANCE study area to serve as dynamic
traffic probes as well as recipients of location data; and 2)
navigation units that employed a comprehensive map database and
average (static) link travel times by time of day, stored on
CD-ROM, which together computed efficient (least duration) routes
between any origin and destination in the northwest portion of the
Chicago metropolitan area. Experiments were designed to dispatch
these equipped vehicles along links at headways or frequencies
comparable to what would have been observed had full deployment
actually occurred. Thus, within the limitations of this controlled
environment, valuative experiments were conducted to assess the
quality of several of the key subsystems of ADVANCE in the context
of structured performance hypotheses. There was particular concern
about the ability of equipped vehicles 1) to both generate and
receive time-saving reroutes in congested corridors, 2) to transmit
(together with fixed detectors and anecdotal police and motorist
reports) to a Traffic Information Center (TIC) timely and accurate
information about road conditions and incident-related congestion
that in turn would generate reliable link and route travel time
estimates useful in real time, and 3) to provide an informational
package and structure having both appeal and utility for drivers
generally familiar with routes and traffic conditions in the study
area. The expandability and transferability of the TIC architecture
and the quality of its user interface, the inherent safety of
real-time in-vehicle navigation, and the lessons learned from
ADVANCE deployment were also evaluated.
Focused on-road tests, began on June 1 and continued through
December 14, 1995, followed by a period of data evaluation,
documentation of results, and development of conclusions about the
findings and usefulness of the project. This paper describes the
tests, discusses development of the overall evaluation plan and the
evaluation management concept which guided them, and reports on
issues and results of data analysis known at time of writing.