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Transportation Theory and Planning

The aim of this research is to analyze the transport system and its subcomponents in order to highlight which are the design tools for physical and/or organizational projects related to transport supply systems. A characteristic of the transport systems is that the change of their structures can recoil on several entities, groups of entities, which constitute the community.
The construction of a new infrastructure can modify both the transport service characteristic for all the user of the entire network; for example, the construction of a transportation infrastructure can change not only the transport service characteristics for the users of the entire network in which it is part of, but also it produces economical, social, and environmental effects.
Therefore, the interventions or the improvements choices must be performed using a rational decision making approach. This approach requires that these choices are taken through the quantitative evaluation of the different effects caused by the different intervention plans. This approach becomes even more necessary when the decisions are taken in behalf of the community.
Then, in order to understand how to develop a planning process in Transportation I will firstly analyze the transport system and the mathematical models used to describe it: these models provide us significant indicators which can be used to evaluate the effects of possible interventions.
In conclusion, I will move on the topics related to the transport planning, analyzing the planning process, and the variables that have to be considered to perform a feasibility analysis or to compare different alternatives. In conclusion I will perform a preliminary analysis of a new transit system which is planned to be developed in New York City.

Mostra/Nascondi contenuto.
Transportation Theory and Planning 1 CHAPTER 1 TRANSPORTATION SYSTEM ANALISYS AND PLANNING PROCESS 1.1 Transportation system The transportation system is defined as the set of components and their interactions whose determine the travel demand between two different points and the transportation service offer to supply. 1 To clarify the above statement, let us consider a city. We can identify two relevant systems for our analysis within it: the activities system and the transportation one. The first is characterized by the following elements 2 : - the families and their residences, which can be classified through certain criteria such as the income bracket, composition, etc…; - the economic activities; - the available surfaces in the various zones of the territory, classified on the base of their use destination (apartments, offices, shops, ecc…). The above listed components are correlated. Indeed, the family distribution on the countrywide is strictly related to the job-opportunity locations. Moreover, several economical activities settlement is determined by the family distribution. Lastly, the presence of families and economical activities in the different areas of the city significantly influence the surface availability and the related prices. It has also to be highlighted the role played by the relative accessibility between zones, on which the transportation service characteristics are relevant. Generally, the residence choice accounts for its active accessibility to work areas and to areas in which family services are located. Moreover, the activities settlement is also based on the passive accessibility, with respect to potential clients, of the alternative zones. Thus, it is worth to notice that the transportation demand is a derived demand: a movement does not produce utility but it is done in order to perform a certain activity at the travel destination. 3 And the transport system strongly interacts with the land-use, which regards all the activities and their special distribution on the territory. 1 Lupi, Marino. La Domanda di Trasporto (Appunti dalle lezioni di Tecnica ed Economia dei Trasporti). DISTART - Trasporti, Bologna. 2 Catalano, Mario. La Pianificazione dei Sistemi di Trasporto. Corso di Tecnica ed Economia dei Trasporti, Prof. Corretti Vincenzo, a.a. 2003-2004. 3 Cascetta, Ennio. Transportation System Engineering: Theory and Methods. UTET, 1998.

Tesi di Laurea Magistrale

Facoltà: Ingegneria

Autore: Stefano Angelini Contatta »

Composta da 240 pagine.


Questa tesi ha raggiunto 254 click dal 07/07/2011.

Disponibile in PDF, la consultazione è esclusivamente in formato digitale.