REVISION

Sample Question The sample questions for this year. Describe briefly the classic transport model, explaining the four stages of the model. [10] Classify trips based on the notions of trip generation. [5] What are HB and NHB trips? From a diagram (as shown in lecture 1) identify the HB and NHB trips and generate the possible OD matrix. [5]

Sample Question Category Analysis Example given in lecture 2. [10] Explain the advantages and disadvantages of growth- factor methods. [5] Gravity model example given in lecture 3. [10] Gravity model example given in lecture 3. [8] Growth factor model example given in tutorial 1. [10]

Sample Question Explain the factors affecting mode choice. Classify and describe the existing mode-choice models. [3+7] Example of mode-choice problem in lecture 4. [10] For a certain OD pair there are two mode alternatives, car and bike. Travellers are assumed to consider two attributes: costs and travel time (see table below) Travelers are assumed to maximize their utility given by where α is the value of time (VOT). What value should at least be for the car to be the preferred alternative?

Sample Question What is travel resistance? What are the factors that affect route choice? [5] Explain the different assignment models. Describe AON assignment. [10] What are Wardrop’s first and second principle? Explain the difference between selfish and system equilibrium. [10] AON assignment example given in lecture 6. [10] Town-centre & Bypass Problem given in lecture 6. [5]

Sample Question The travel costs of two links are as follows, and Determine DUE for two links for the two following cases, –when the links are in a sequence –when both of them are serving the same O-D pair The total demand for the two links is 500. [10] Regression analysis example given in lecture 2. [10] Discuss the factors which affect trip frequency choice, trip destination choice and choice of travel modes. [4+4+4]

Sample Question Explain signal phase and signal groups. With the help of an example intersection explain the relationship between phase and groups. [10] Describe discharge headway (use diagram) and start- up lost time. What is the relationship between discharge headway and saturation flow rate? [10] Design the layout of an intersection based on the critical lane volumes (lec 8). [6]

Sample Question Lane capacity example given in lecture 7. The relationship between total lost time, yellow time and green time are required to be remembered. The equation that will be given, [10] What is a critical lane? How to find the capacity of an intersection based on critical lanes? [5] What are right turning vehicles at an intersection? What are the different measures used in traffic signal designing to accommodate right turning vehicles? [10]

Sample Question What is delay? Define different types of delay measures. Use a diagram. [7] Describe Webster’s delay model. [8] Consider an approach volume of 1000 vph, saturation flow rate of 800vphg, cycle length 90 s and g/C ratio What average approach delay per vehicle is expected? [6] What is intergreen/change or clearance period?

Sample Question Example of traffic signal designing given in lec 9. –Recommend a signal phase plan for the intersection shown in the figure. –Plot the ring diagram along with the appropriate critical lane volumes for the recommended signal phase plan for the intersection. –Find an appropriate cycle length for the intersection considering the recommended signal phase plan. –Calculate the effective green time for each of the phases. [20] Dilemma zone example in lecture 9. (The equations for calculating yellow time will be given. [10]

Things to remember, (if not given in the exam) Total lost time = 3 sec Width of a lane = 3m or 3.5m Saturation headway = 2.14sec Equation for min cycle time will be given but not for desired cycle time. In exam please mention what values you are using. Even while using the standard values it is important to mention it specifically.