Questions.pdf

Question 1 ) Explain what you understand by a system from the perspective of transportation? c) Justify why the demand for transportatior is a derived demand. d) Explain the demand curve and supply curve of transportation services considering cost as the driving variable. How would you interpret...

Question 1 ) Explain what you understand by a system from the perspective of transportation? c) Justify why the demand for transportatior is a derived demand. d) Explain the demand curve and supply curve of transportation services considering cost as the driving variable. How would you interpret the equilibrium point? e) Explain the concept of level of service for a transportation option? f) In deciding why and how to travel, it is agreed that all wants are actually desires although not all desirex are wants. Explain why this is so. g) As a system analyst, you may need to intervene in the system by considering several options or decision variables. Such intervention leads to several consequences or impacts. Consider one (1) Transportation-based option and one (1) one activity-based option and discuss the possible interventions and impacts for each of them. Explain a possible impact to the users of transportation facilities. h) For a study zone, the demand for travel is given as V5000-100t. After improvement in the transportation system, the new demand function is given as V7500-150t. Note that 1 is the travel time in hours and V is the volume of flow in trips per hour. Comment on the change in the functional parameters due to this improvement. i) What do you understand by the term "captive riders" in transportation systems planning? The road users are the customers for where an acceptable level of service must be provided These consumers always desire to have a defined activity patterns so as to fulfill the aspirations. Define activity pattern under employment pattern. Hence choice for consumers in the context of transportation. k) Define Marginal utility and Margined Rate of Substitutions Question 2 a) List the steps of travelers' behaviour modeling. Question 3 a) Explain your understanding of the logit model in the context of mode choice model b) Give the four properties of indifference curves. Question 4 c) Assume the following often used three algebraic forms of the travel demand function: Logistic form: V= alpha 1+ alpha e ^ (2RV) Product form: V = alpha * X ^ beta Linear form: V = alpha + beta*X Logistic product form: V = alpha/(1 + gamma ^ (x / y)) Determine the expressions for elasticity of demand for each of them. Question 5 a) Define each of the following steps in urban transportation demand modeling: (i) Trip generation (ii) Trip distribution (iii) Modal split (iv) Network (Traffic) assignment Question 6 a) Distinguish between balanced and unbalanced transportation problems. b) Describe cach of the following three methods for determining the basic feasible solution in transportation of goods it a network from production sources to consumption destination (1) North west corner method (ii) Least cost method (iii) Vogel's approximation method (VAM)