What are the main pros and cons of using cost-benefit analysis for appraising transportation investments? 2-    What contribution has economics made to improving the rigor

Provide answers in essay form the following. (One page per answer at least). There is no need for tables, graphs or references. (make sure there is no plagiarism on your answers). Make sure you use examples when answering to questions to support your arguments.

1-    What are the main pros and cons of using cost-benefit analysis for appraising transportation investments?

2-    What contribution has economics made to improving the rigor of transportation planning?

3-    What role can transportation play in assisting economic growth in developing countries? What are the advantages of the governments of these countries employing franchising structures to involve the private sector in transportation investments?

4-    What are the main potential economic gains from public-private partnerships? What are the challenges in creating optimal PPPs? (Focus mainly on the transportation sector for this question, use example from transportation sector also)