Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 13, Problem 16P
To determine
The most cost-effective alternative using present worth analysis.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Two alternatives are under consideration for maintenance of a bridge. Select the mostcost-effective alternative using present worth analysis. Assume an interest rate of10% per year and a design life of 50 years for each alternative.Alternative A consists of annual maintenance costs of $5,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $20,000Year 30, in which a deck overlay and structural repairs will cost $105,000Alternative B consists of annual maintenance costs of $3,000 per year for the designlife except for:Year 20, in which bridge deck repairs will cost $35,000Year 30, in which a deck overlay and structural repairs will cost $85,000
The initial investment for constructing a median and guardrails for a prestressed concrete bridge is $1000000. Maintaining these facilities is expected to cost $2000 annually for the first five years of service and $10000 for the next five years of service. It is expected that these facilities will be rehabilitated at the end of the tenth year at a cost of $60000, after which the maintenance costs are expected to decrease to $6000 per year. What is equivalent uniform annual cost over a 15 -year period of service if the interest rate is 6% per year?
Three transportation projects have been proposed to increase the safety in and around a residential neighborhood. Each project consists of upgrading existing street signing to highly retroreflective sheeting to increase visibility. The following table shows the initial construction costs, annual operating costs, useful life of the sheeting, and the salvage values for each alternative. Assume that the discount rate is 8%. Calculate the present worth for each alternative and determine the preferred project based on the economic criteria.
Discount Rate: 8%
Chapter 13 Solutions
Traffic and Highway Engineering
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- A secondary road in a developing country, 30 miles long, is to be improved by surface treating the gravel surface without any change in length. The cost of the improvement is estimated at $150,000 per mile. A present annual transport cost for all traffic on the existing road (vehicle operating cost, maintenance cost, etc.) is estimated at $205,000 per mile. After improvement, this is expected to reduce to $170,000 per mile per annum. Reconstruction takes place in two years with equal expenditures in each year. Assume that in the second year of construction, transport cost on the improved road is equivalent to present costs in half the length and new transport cost on the other half. Would you undertake the project? (The minimum attractive rate of return (MARR) is 8.5% and the project life is 20 years after reconstruction.) Resealing would be required 10 years after reconstruction at a cost of $55,000 per mile. Use the net present worth methodarrow_forwardDunkin City wants to build a new bypass between two major roads that will cut travel time for commuters. The road will cost $14,000,000 and save 17,500 people $100/yr in gas. The road will need to be resurfaced every year at a cost of $7,500. The road is expected to be used for 20 years. Determine if Dunkin City should build the road using B/C analysis. The cost of money is 8%.arrow_forwardDevelop a detailed analytical framework using life-cycle cost analysis of a freeway system operation improvement project, such as a project for varying freeway speed limits in the range of 45- 70 mph for different locations and time periods of a typical working day.arrow_forward
- Answer the following questions. 1. Determine the normal duration of the project 2. Determine the normal cost of the project 3. Determine the critical path under normal conditions. 4. Determine the "minimum duration" of the project 5. Determine the minimum cost of the project if it is to be accelerated (crashed) to its "minimum duration"arrow_forwardA road is being proposed to facilitate a housing development on a scenic Two alternatives have been suggested. One of the roadway alignments is to go around the lake and slightly impact a wetland. The second alternative will also go around the lake and will significantly impact two wetlands. The following table shows the anticipated costs for each alternative. Assuming that the annual interest rate (i) is 7%, determine which alternative is preferred using the Net Present Value method. Alternative First Cost ($) Annual Maintenance ($) Service Life (Years) Salvage Value ($) Annual Wetland Rehabilitation Costs ($) Annual Roadway Lighting Costs ($) I 75,000 3000 15 45,000 7500 1500 II 125,000 2000 15 25,000 2500 2500arrow_forwardThe Department of Traffic is considering three improvement plans for a heavily traveled road within the city. The road improvement is expected to achieve three goals: improve travel speeds, increase safety, and reduce operating expenses for motorists. The annual dollar value of savings compared with existing conditions for each criterion and additional construction and maintenance costs is shown in Table 1. If the economic life of the road is considered to be 53 years and the discount rate is 4%, which alternative should be selected? Evaluate the two proposals based on economic evaluation criteria using the Net Present Worth (NPW) and benefit-cost ratio (BCR) methods for economic analysis.arrow_forward
- The yearly transition probabilities associated with various condition states of urban Interstate highway bridges in a certain district are given below: In 2005, there are 1000, 2000, 1000, and 500 bridges in the Excellent, Good, Fair and Poor condition states, respectively. Find the number of bridges that are expected to be in the Excellent, Good, Fair and Poor conditions in 2010. Assuming that no major repairs during the period, so the original transition matrix stays unchanged.arrow_forwardThe AW values of three revenue alternatives are $-23,000 for A, $-21,600 for B, and $-27,300 for C. On the basis of these AW values, the correct decision is to:a. select alternative A.b. select alternative B.c. select alternative C.d. select the do nothing alternative.arrow_forwardCase Study for Professional Ethics. During an investigation of a bridge collapse, Engineer A investigates another similar bridge, and finds it to be only marginally safe. He contacts the governmental agency responsible for the bridge and informs them of his concern for the safety of the structure. He is told that agency is aware of this situation and has planned to provide in next year’s budget for its repair. Until then, the bridge must remain open to traffic. Without this bridge, emergency vehicles such as police and fire apparatus would have to use an alternate route that would increase their response time by approximately twenty minutes. Engineer A is thanked for his concern and asked to say nothing about the condition of the bridge. The agency is confident that the bridge will be safe. Analyse the case using the six steps with the perspective of Engineer A.arrow_forward
- A dam is being considered to reduce river flooding. But if a dam is built, what height should it be? Increasing the dam’s height will (1) reduce a flood’s probability, (2) reduce the damage when floods occur, and (3) cost more. Which dam height minimizes the expected total annual cost? The state uses an interest rate of 5% for flood protection projects, and all the dams should last 50 years.arrow_forwardCase Study During an investigation of a bridge collapse, Engineer A investigates another similar bridge, and finds it to be only marginally safe. He contacts the governmental agency responsible for the bridge and informs them of his concern for the safety of the structure. He is told that agency is aware of this situation and has planned to provide in next year’s budget for its repair. Until then, the bridge must remain open to traffic. Without this bridge, emergency vehicles such as police and fire apparatus would have to use an alternate route that would increase their response time by approximately twenty minutes. Engineer A is thanked for his concern and asked to say nothing about the condition of the bridge. The agency is confident that the bridge will be safe. Analyse the case using the six steps with the perspective of Engineer Aarrow_forwardA city engineer has estimated the annual toll revenues from a proposed highway construction project over 20 years as follows: An = ($2,000,000)(n)(l.06)n-1 n = 1.2 .... ,20.To determine the amount of debt financing through bonds, the engineer was asked to present the estimated total present value of toll revenue at an interest rate of 6%. Assuming annual compounding, find the present value of the estimated toll revenue.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Traffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning
Fundamentals Of Construction EstimatingCivil EngineeringISBN:9781337399395Author:Pratt, David J.Publisher:Cengage,
Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning
Fundamentals Of Construction Estimating
Civil Engineering
ISBN:9781337399395
Author:Pratt, David J.
Publisher:Cengage,