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Lesson
Substantial cost overruns could result from inadequate detailed design, new legislation (e.g., banning slow-moving traffic from highways), changes in pavement composition to address climate change impacts and overloading, constructability issues, unforeseen project features, and road safety and traffic issues.

Project Number: 40540-014, 40540-017
Project Name: South Asia Subregional Economic Cooperation Road Connectivity Project
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Lesson
issues, unforeseen project features, and road safety and traffic issues

Project Number: 46040-003
Project Name: Yunnan Pu'er Regional Integrated Road Network Development Project
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Lesson
Project costing at design stage should realiably estimate the costs of all civil and other engineering costs and provide allowance for foreign currency fluctuations. The actual cost of one irrigation scheme turned out some $10 million greater than estimated at approval. This resulted in significant revision to the subproject design. The revision also incorporated the appreciation in special drawing rights against the US dollar and the domestic and international inflation that pushed down the real value of project resources.

Project Number: 40190-013
Project Name: Greater Mekong Subregion Flood and Drought Risk Management and Mitigation Project 
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Lesson
Processing teams need to ensure that the scope and cost estimate of projects are realistic and reflect the actual contexts. Changes in the procurement plan and safeguards document necessitated by the revisions in project scope and costs caused startup delays. The Viet Nam component had a large amount of undisbursed budget because of overestimations in the cost of civil works and land acquisition and resettlement. Advance actions to engage critical consultants early enough should have helped mitigate the delays.

Project Number: 41444-013
Project Name: Second Northern Greater Mekong Subregion Transport Network Improvement Project
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Lesson
Appropriate contract packaging, stakeholder involvement in project preparation, and reliable cost estimates are of particular importance to successful project implementation. This project encountered several weaknesses in design and preparation that made implementation challenging.

Project Number: 43319-022
Project Name: Greater Mekong Subregion East-West Economic Corridor Towns Development Project
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Lesson
Government’s effective and responsive implementation of the program and use of funds highlighted the importance of being able to adjust allocations as demanded by the crisis. The government successfully utilized its ADB countercyclical loan to support its relief and stimulus program under its two pandemic emergency decrees and funds (FY2020 and FY2021). In particular; the Cabinet responded rapidly to the successive waves of COVID-19; allocating and reallocating budgets to work plans and projects where they were most needed at any one time.

Project Number: 54177-001
Project Name: COVID-19 Active Response and Expenditure Support Program
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