Thesis (Ph. D.)--University of Texas at Austin, 2002. / Vita. Includes bibliographical references. Available also from UMI Company.

Route charges are fees that airlines pay in order to utilize the Air Navigation Services (ANS) of a European state. The fee is based on three values; the weight of the aircraft, the length of the flight, and the state’s specific unit rate. The unit rate of each state is in turn based on the forecasted costs of providing ANS for that state and the amount of traffic forecasted for the year to come. This makes for different unit rates for different states, which leads to different costs for flying different routes in the European airspace. A state having costs that are increasing faster than the amount of traffic is increasing will lead to a higher unit rate. A higher unit rate may lead to airlines avoiding the state’s airspace due to higher costs, thus accounting for even less traffic and an increase in unit rate. This thesis examines the relationship between unit rate and amount of traffic, and specifically tries to find out how much the unit rate affects the traffic count. This has been done by reading previous papers on the subject, and creating a model to easily present facts found. The result of the thesis suggests that states actually profits more by increasing the unit rate rather than actively trying to reduce it. This contradicts the idea of lowering prices always being a good thing. There is a limit to how much the unit rate can be increases however, at which all traffic will choose to circumnavigate the airspace. Finding a good balance between traffic lost and unit rate increased is suggested as the best way to go.

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Past research indicated that driver information requirements were varied (e. g. Spyridakis et al., 1991) and the motorists population cannot be consider homogeneous in terms of information requirements (e. g. Haselkorn et al., 1991). Some of the previous studies even suggestedth at before the so-called intelligent systemsg o into production, several unresolved issues concerning what kind of information drivers require need to be resolved. Thus, this thesis is interested in exploring several human factors issues concerning drivers; ' information requirements. First, the study is trying to provide at least a general picture of what kind of information is suitable to be presented to drivers in certain types of journey. Secondly, the thesis is interested in exploring the suitable timing and mode to present the required information to the target audiences. Besides the aforementioned human factors issues, this research also investigated how drivers plan their routes and find their way in unfamiliar destinations. The study is also interested in examining criteria used by drivers in choosing a route to their intended destination. Finally, this thesis aims to measure respondents' behavioral responses when they were given several traffic messages on congestion while commuting to and from work. The results also revealed that local drivers used more than one strategy for route planning and wayfinding in unfamiliar locations. Maps were the main strategy used by most of the respondents who participated in this study. Other strategies used by respondents were asking a passer-by, relying on memory and going without preparation. Apart from that, this study also demonstrated the difficulty in arriving at a general conclusion concerning the appropriate criteria that drivers would use in selecting a route for different trips. Local drivers would use a variety types of criteria in order to choose a route to a particular destination. However, the thesis identifies that drivers mainly employed three types of criteria in selecting a route to a particular destination. These criteria were safety, saving mileage and avoiding congested routes The final study (Study 3) was interested in extending the results of both studies I and 2 particularly the presentationo f congestionm essagesto its end users,i . e. motorists. An experiment was conducted to investigate drivers' response towards the presentation of traffic messagesa bout congestion.T he findings clearly supportedp revious work that found different types of information are likely to elicit different kind of responses from the drivers. In addition, local drivers also had ideas about the design of future traffic messages on congestion. For example, the need to have a quick solution when faced with the problem, e. g. offer alternate route; the need to have information on travel time if they decided to use the alternate route recommended by the systems; and some of the messages should be given as early as possible to serve as pre-trip advanced warning to drivers. The findings clearly demonstrated the preference for having more information rather than less.

Thèses (M.Sc.)--Université de Sherbrooke (Canada), 1999. / Titre de l'écran-titre (visionné le 13 juillet 2006). Publ. aussi en version papier.

Thesis (M.S.V.)--University of Toledo. / Typescript. "A thesis [submitted] as partial fulfillment of the requirements of the Master of Science degree in Civil Engineering." Includes bibliographical references (leaves 85-92).

Originally presented as the author's Thesis (doctoral)--Technische Universität München. / "FGV-TUM." Includes bibliographical references (p. 164-168).

Th.--Lett.--Paris 10, 1978.

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