Effectiveness of Different Approaches to Disseminating Traveler Information on Travel Time Reliability (2013) / Chapter Skim
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Pages 25-39
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25 Introduction and Context Today, travelers can acquire traveler information through a number of media, ranging from traditional roadside signage and broadcast media to newer electronic wireless and webbased media. The resulting mix of traffic and transportation system status data has greatly increased information accessibility and permitted an ever-greater degree of traveler-specific customization.
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27 As of the mid-1990s, agencies have placed toll readers not for the purpose of billing but rather to acquire travel time estimates along facilities where significant numbers of vehicles have toll tags. The Houston region has been very successful in using nonrevenue toll tag readers on nontoll highways to acquire and transmit traveler information.
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28 the placement of Bluetooth receivers along the routes for which travel time information is desired, much like toll tag receivers. Bluetooth tracking has been applied as an alternative to floating car or other probe vehicle tests and can supplant such tactics in computing ground truth.
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29 between vehicles and among vehicles, wireless devices, and the roadway infrastructure. These technologies are, in essence, similar to toll tag readers but have far richer information and greater emphasis on vehicle safety and driver assistance applications.
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30 available by phone. In 2009, the Federal Highway Administration submitted a Notice for Proposed Rulemaking for the RealTime System Management Information Program.
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31 to add cellular technology to their portable devices with hopes of maintaining their market position. The next section highlights mobile applications from PND vendors as well as others vying for market share.
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32 The application uses Facebook or an e-mail import to determine a user's social network. Users receive a notification when someone in their network has a question that they may be able to answer.
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33 DOTs across the country. INRIX delivers traffic content to clients and consumers on terrestrial and satellite radio, on broadcast and cable TV, through wireless applications and services, and via the Internet.
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34 purchasers of probe data are increasingly linking payment to accuracy requirements. A search on the accuracy of most PNDs and mobile and crowdsourced applications yields forums with comments citing poor navigation, incorrect traffic information content, and product shortcomings (Android Applications 2012)
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35 content for use in the mobile media, and the traffic information data for use in travelers' mobile media. TomTom In 2006, TomTom was the leading provider of navigation devices, with more than 35% of the market share of installed and personal navigation devices.
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36 Synopsis of Market Participants The navigation market experienced significant contraction and concentration in the past 3 years. For example, MiTAC acquired Navman and Magellan in 2007 and 2008, respectively (Privat 2008)
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37 awareness to filter what information is provided. For example, route reliability might be used to narrow a long set of alternate routes to two options on the basis of the traveler's prespecified reliability preferences.
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38 reliability information will prove valuable. For example, when planning a trip to a new client, a worker might benefit from knowing that the reliability of travel on a major arterial is far greater than the freeways on Friday mornings; and though that route might take a few more minutes, it would reduce the risk of a late arrival.
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39 In addition, traveler information on commercial radio will continue to be present given its strength in garnering advertising revenue. • No standard methods or lexicon to deliver reliability information to travelers has emerged in either the United States or Europe.
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