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Note for Transportation Engineering 1 - TE1 By Aamir Khan

  • Transportation Engineering 1 - TE1
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Chapter 1 associated need is the transport of raw materials to a manufacturing unit or finished goods for consumption. Transportation fulfills these basic needs of humanity. Transportation plays a major role in the development of the human civilization. For instance, one could easily observe the strong correlation between the evolution of human settlement and the proximity of transport facilities. Also, there is a strong correlation between the quality of transport facilities and standard of living, because of which society places a great expectation from transportation facilities. In other words, the solution to transportation problems must be analytically friendly for both men and material. problems. The characteristics of transportation system that makes it diverse and complex are listed below: Covering all modes of transport; air, land, and sea for both passenger andfreight. Encompassing the problems and viewpoints of government, private industry, and public. Ranging across a spectrum of issues that includes national and international policy, planning of regional system, the location and design of specific facilities, carrier management issues, regulatory, institutional and financial policies. 1.1 Aamir Khan

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Aiming at national and regional economic development, urban development, environment quality, and social quality, as well as service to users and financial and economic feasibility. Drawing on the theories and methodsof engineering, economics, operations research, political science, psychology, other natural, and social sciences, management and law. The context in which transportation system is studied is also very diverse and are mentioned below: Urban transportation planning, producing long range plans for 5-25 years for multimodal transportation systems in urban areas as well as short range programs of action for less than five years. Regional passenger transportation, dealing with inter-city passenger transport by air, rail, and highway and possible with new modes. Routing and management, choice of different modes of rail and truck. in a rapidly changing world is significant to a transportationplanner. Among them four critical dimensions of change in transportation system can be identified; which form the background to develop a right perspective. When the population, income, and land-use pattern changes, the pattern of demand changes; both in the amount and spatial distribution of that demand. As an example, earlier, only two alternatives (bus transit and rail transit) were considered for urban transportation. But, now new systems like LRT, MRTS, etc offer a variety of alternatives. Variety of policy options designed to improve the efficiency, such as incentive for car-pooling, bus fare, road tolls etc. Earlier all beneficiaries of a system was monolithically considered as users. Now, not one system can be beneficial to all, instead one must identify the target groups like rich, poor, young, work trip, leisure etc. unity: a body of theory and set of basic principles to be utilized in every analysis of transportation systems. The core of this is the transportation system analysis approach. The focus of this is the interaction between the transportation and activity systems of region. This approach is to intervene, delicately and deliberately in the complex fabric of society to use transport effectively in coordination with other public and private actions to achieve the goals of that society. For this the analyst must have substantial understanding of the transportation 1.2 Aamir Khan

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systems and their interaction with activity systems; which requires understanding of the basic theoretical concepts and available empirical knowledge. The first step in formulation of a system analysis of transportation system is to examine the scope of analytical work. The basic premise is the explicit treatment of the total transportation system of region and the interrelations between the transportation and socioeconomic context.They can be stated as: The total transportation system must be viewed as a single multi-modal system. political system of the region. This follows the following steps for the analysis of transportation system: S1 Consider all modes of transportation S2 Consider all elements of transportation like persons, goods, carriers (vehicles), paths in the network facilities in which vehicles are going, the terminal, etc. S3 Consider all movements of passengers and goods for every O-D pair. S4 Consider the total trip for every flows for every O-D over all modes and facilities. As an example, consider the study of intra-city passenger transport in metro cities. Consider all modes: i.e rail, road, buses, private automobiles, trucks, new modes like LRT, MRTS, etc. intra-city transit like taxis, autos, urban transit. Consider diverse pattern of O-D of passenger and goods. Consider service provided for access, egress, transfer points and mid-block travel etc. Once all these components are identified, the planner can focus on elements that are of real concern. Transportation engineering can be broadly consisting of the four major parts: Transportation Planning Geometric Design Pavement Design Traffic Engineering Abrief overview of the topics is given below: Transportationplanning deals with the development of a comprehensive set of action plan for the design, construction and operation of transportation facilities. 1.3 Aamir Khan

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sent both the current as well as future transportation system. tural design of the facilities. The topics include the cross-sectional features, horizontal alignment, vertical roads. of the layer thickness, and construction and maintenance procedures. The design mainly covers structural the impact of loads, functional design emphasizes on the riding quality, and the drainage design protects the pavement from damage due to water infiltration. Traffic engineering Traffic engineering covers a broad range of engineering applications with a focus on the safety of the public, a variety of engineering and management skills, including design, operation, and system optimization. In order to address the above requirement, the traffic engineer must first understand the traffic flow behavior is controlled so that the transport infrastructure is used optimally as well as with good service quality. In short, the role of traffic engineer is to protect the environment while providing mobility , to preserve scarce resources while assuring economic activity, and to assure safety and security to people and vehicles, through both acceptable practices and high-tech communications. In addition to the four major disciplines of transportation, there are several other important disciplines that are being evolved in the past few decades. Although it is difficult to categorize them into separate well defined disciplines because of the significant overlap, it may be worth the effort to highlight the importance given by the transportation community. They can be enumerated as below: Public transportation or mass transportation deals with study of the transon the urban travel by bus and rail transit. The major topics include characteristics of various modes; planning, management and operations; and policies for promoting public transportation. 1.4 Aamir Khan

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