Benefit

Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that users of an improved traveler information web site would receive annual benefits of a 5.4 percent reduction in delay.


May 2000
San Antonio,Texas,United States


Summary Information

This report summarized the results of several ITS evaluation projects in the city of San Antonio, Texas. San Antonio had a relatively extensive implementation of ITS prior to this study and, consequently, the incremental benefits experienced in San Antonio through expansion and additions to the existing system may be somewhat smaller than the benefits that could be achieved in areas with little prior implementation of ITS.

Improvements to elements of San Antonio’s traveler information system included new traveler information kiosks, improvements to the internet web site, and the installation of In-Vehicle Navigation (IVN) devices in vehicles operated by public agencies in the San Antonio area. The kiosks provided information on incidents and congestion on the freeway network, transit schedules and fares, as well as navigational assistance. The web site provided freeway traffic information including incident locations, and links to transit schedule and fare information. The IVN devices provided navigational assistance, incorporating information on congestion, incidents and railroad crossing status when planning trips.

Evaluation of the kiosks by a qualified expert indicated that the devices had several functional problems and were unlikely to be used often by travelers. Based on these results, the study did not perform further evaluation on the system impacts of the kiosks or customer satisfaction with them.

The web site evaluation indicated that usage of the site was increasing at a rate of 19 percent per year over the course of the nine-month evaluation period. Significant latent demand for the service was evidenced by spikes in the number of users accessing the site during two severe weather events over the evaluation period. Despite this growth, the relatively small number of travelers making use of the system lead to no overall system impacts due to the web site. Modeling results indicate that individual travelers who use the web site prior to traveling along a particular corridor would receive annual benefits of a 5.4 percent reduction in delay, a 0.5 percent reduction in crash rate, and a 1.8 percent reduction in fuel consumption.

The final component of the San Antonio deployment initiative was a system using volunteer private vehicles equipped with radio transponders as probes to determine travel times along area roadway segments. Over 40,000 people volunteered to use the tags on their vehicles, indicating strong support for the project. The information provided had no direct impact on network efficiency, safety, or energy consumption.
    The evaluation report contains more detailed explanations of the findings for each of the projects carried out during the San Antonio Model Deployment Initiative.

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    Source

    Metropolitan Model Deployment Initiative: San Antonio Evaluation Report - Final Draft

    Author: Carter, M., et al.

    Published By: Federal Highway Administration, U.S. DOT

    Prepared by SAIC for the U.S. DOT

    Source Date: May 2000

    EDL Number: 12883

    Other Reference Number: Report No. FHWA-OP-00-017

    URL: https://rosap.ntl.bts.gov/view/dot/2893

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    Benefits From This Source

    Evaluation indicated that integrating DMS and incident management systems could reduce crashes by 2.8 percent, and that integrating DMS and arterial traffic control systems could decrease crashes by 2 percent, in San Antonio, Texas.

    Evaluation of freeway DMS integrated with incident management in San Antonio, Texas, found fuel consumption reduced by 1.2 percent; integrating the DMS with arterial traffic control systems could save 1.4 percent.

    In San Antonio, Texas, 60 percent of drivers of transit vehicles equipped with in-vehicle navigation devices reported that they saved time and felt safer.

    In San Antonio, Texas, focus group participants felt that DMS were a reliable source of traffic information.

    In San Antonio, Texas, usage of a traveler information Web site increased at a rate of 19 percent per year and spiked during severe weather events.

    Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that drivers of vehicles with in-vehicle navigation devices could experience an 8.1 percent reduction in delay.

    Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that integrating DMS, incident management, and arterial traffic control systems could reduce delay by 5.9 percent.

    Modeling performed as part of an evaluation of nine ITS implementation projects in San Antonio, Texas indicated that users of an improved traveler information web site would receive annual benefits of a 5.4 percent reduction in delay.

    Costs From This Source

    An advanced highway-rail intersection warning system was deployed for just over $350,000 as part of the San Antonio Metropolitan Model Deployment Initiative.

    In-vehicle navigation units and real-time traveler information software development were the main cost drivers for the San Antonio TransGuide MMDI project to improve operations at several public agencies.

    Over half of the $3.25 million cost for the San Antonio Lifelink advanced telemedicine project was attributed to reseach and development.

    The integrated freeway/incident management system covering 28.9 miles in San Antonio was deployed for approximately $26.6 million.

    Benefit ID: 2007-00368