Cost-Benefit Analysis - Traffic Congestion in SimCity
You are a budget analyst in the state budget office in the State of Confusion. SimCity, the largest city in the state, has been growing rapidly in recent years, and there has been a considerable increase in the population of the southern suburbs of the city. Many of the jobs, however, remain in (or near) the downtown area. This creates a transportation problem, since the roads that connect the people to their jobs are increasingly crowded.
One of the Governor’s major priorities in the campaign was reducing traffic congestion.
There are two major projects under consideration for inclusion in the state budget. The first would build a 20 mile light rail system to connect the southern suburbs to downtown SimCity. The second would build a new toll highway to relieve traffic congestion on the existing roads.
Light Rail
The light rail system is scheduled to be constructed using 30 year revenue bonds.
Construction will begin in July of 2021, and the system will be completed by the end of 2024. It will begin operation in January of 2025. The following represent relevant data that can be used to calculate costs and benefits:
- The total cost of constructing the light rail system is $450 million.
- The bonds would be issued in July of 2021, and the interest rate on the bonds will be 5%.
- Yearly operating cost is estimated at $13 million.
- All fares generated will go toward defraying the cost of construction and operating the system. The following represent estimates of ridership once the system is fully operational:
o There will be 50,000 round trips per weekday, at a cost of $4.00 per round trip.
o There will be a total of 30,000 additional night and weekend trips per week, at a cost of $2 per round trip.
- A special ½ cent sales tax will be levied in the SimCity metropolitan area to support the new light rail system. Total retail sales in the area subject to this tax are estimated at $100 million per year. This tax takes effect at the beginning of 2021.
Toll Highway
The toll highway would also be constructed using 30 year revenue bonds. Construction would begin in January of 2020, and the highway would be completed by July of 2023, and would begin to be used at that point. The following are relevant cost and benefit data for the toll highway:
- Total construction cost would be $300 million.
- The bonds would be issued in January of 2020, and the interest rate on the bonds will be 5%.
- The yearly operating cost, for employing personnel to oversee the authority and to operate ticket booths, would be $8 million per year.
- Drivers would pay a toll of 50 cents each way for using the highway. This would increase to 80 cents each way for rush hour trips (6:30 to 9:30 AM and 3:30 to 6:30 PM weekdays). The following is an estimate of the number of (one way) trips on the toll highway:
o There would be 150,000 total rush hour trips per weekday.
o There would be an additional 150,000 trips per week during non-rush hour times.
The Assignment
The Governor has asked you to analyze these two projects and to present an analysis comparing them. The question that you are to focus on concerns the extent to which each project will generate sufficient revenue in order to justify the expenditure on that project.
Your analysis should cover a 35 year period, beginning in January of 2020, and continuing through December 2054. The discount rate is 5 percent. Your analysis should recommend to the Governor which project (if either) should be funded.
You are to communicate the results of your analysis in a memorandum to the Governor, not to exceed 2 pages (single-spaced, 11/12 point, standard font, one-inch margins) in length. Attached to that memo should be your analysis in spreadsheet form.

Cost-Benefit Analysis - Traffic Congestion in SimCity You are a bu...