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Main Roads Western Australia
Question 01
Calculate the benefit-cost ratio for a $50M bridge upgrade that saves 10 minutes travel time for 20,000 daily users. Show your methodology.
Correct Answer 01
Calculate the benefit-cost ratio for a $50M bridge upgrade that saves 10 minutes travel time for 20,000 daily users. Show your methodology.
BCR = (Annual user benefits x 30 years) / Project cost. Time savings = 20,000 users x 10 min x $30/hr = $100,000 daily benefit. BCR = 2.2
Question 02
A regional road upgrade faces indigenous heritage concerns. How would you modify the economic analysis to account for cultural preservation?
Correct Answer 02
A regional road upgrade faces indigenous heritage concerns. How would you modify the economic analysis to account for cultural preservation?
Include heritage value in multi-criteria analysis, quantify preservation costs, and assess alternative routes. Weight cultural factors alongside standard BCR metrics.
Question 03
Analyze traffic data showing 15% growth on a rural highway. What economic factors would you consider for capacity upgrade recommendations?
Correct Answer 02
Analyze traffic data showing 15% growth on a rural highway. What economic factors would you consider for capacity upgrade recommendations?
Consider vehicle operating costs, safety benefits, maintenance savings, and regional economic growth impacts. Compare staged vs immediate upgrade options.
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