32. Describe the different types of transportation systems. (3 marks) 33. Explain the concept of traffic flow and its analysis. (3 marks) 34. What are the principles of highway geometric design? (3 marks) 35. Describe the process of pavement design. (3 marks) 36. What are the factors affecting the choice of transportation mode? (3 marks) 37. Explain the concept of Intelligent Transportation Systems (ITS). (3 marks) 38. Describe the importance of public transportation in urban areas. (3 marks)