Download Highway Travel Time Estimation With Data Fusion by Francesc Soriguera Martí PDF

By Francesc Soriguera Martí

This monograph offers an easy, leading edge strategy for the dimension and momentary prediction of road trip occasions in response to the fusion of inductive loop detector and toll price ticket info. The method is prevalent and never technologically captive, permitting it to be simply generalized for different similar forms of info. The ebook indicates how Bayesian research can be utilized to procure fused estimates which are extra trustworthy than the unique inputs, overcoming a few of the drawbacks of travel-time estimations in accordance with certain information assets. The constructed technique provides price and obtains the utmost (in phrases of commute time estimation) from the to be had facts, with out recurrent and dear standards for extra info. the appliance of the algorithms to empirical checking out within the AP-7 toll road in Barcelona proves that it truly is attainable to boost a correct real-time, travel-time info procedure on closed-toll highways with the prevailing surveillance gear, suggesting that road operators may supply their consumers with such an further price with little extra funding in technology.

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Additional resources for Highway Travel Time Estimation With Data Fusion

Sample text

The value that drivers give to travel time information is different if traveling in an unreliable stretch or in a very reliable one. In turn, this variability and reliability of travel times depends on the physical characteristics of the facility (number of lanes, slope, junctions …) and on its relation to the demand for travelling through it. Because always exist a budget limitation in the intensive monitoring of the network, and road networks are vast, priorities must be given to certain locations.

This may result from the oversight of the researchers’ community to the practical problems, which appear in the implementation of the method. For instance, from the author knowledge, contributions are not found in the literature analyzing in detail the problematic detector drift phenomenon, which accumulate in the input/output curves until they become meaningless. The effects of inner section input/output flows at junctions are not treated either. These issues remain for further research. 2 Travel Time Measurement 15 Legend Single loop detector Fig.

A methodology is proposed in which makes use of the available traffic data to provide accurate travel time information in real time to the drivers entering a highway. Measuring is not enough to achieve this objective and very short term forecasting is necessary. The method uses data obtained from toll ticket data (direct measurement) and from a non-intensive loop detector surveillance system (approximately one loop every 5 km) (indirect measurement), and makes the most of a combined use of the data, using a two level data fusion process.

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