Transportation engineering or transport engineering is the application of technology and scientific principles to the planning, functional design, operation and management of facilities for any mode of transportation in order to provide for the safe, efficient, rapid, comfortable, convenient, economical, and environmentally compatible movement of people and goods . It is a sub-discipline of civil engineering and of industrial engineering. Transportation engineering is a major component of the civil engineering and mechanical engineering disciplines, according to specialisation of academic courses and main competences of the involved territory. The importance of transportation engineering within the civil and industrial engineering profession can be judged by the number of divisions in ASCE that are directly related to transportation. There are six such divisions representing one-third of the total 18 technical divisions within the ASCE .The planning aspects of transportation engineering relate to urban planning, and involve technical forecasting decisions and political factors. Technical forecasting of passenger travel usually involves an urban transportation planning model, requiring the estimation of trip generation, trip distribution, mode choice, and route assignment . More sophisticated forecasting can include other aspects of traveler decisions, including auto ownership, trip chaining and the choice of residential or business location . Passenger trips are the focus of transportation engineering because they often represent the peak of demand on any transportation system.