亚开行-亚太贫困地区低流量农村公路的关键管理问题（英文）-2020.10-42页_1mb

报告摘要

Summary of "KEY MANAGEMENT ISSUES FOR LOW-VOLUME RURAL ROADS IN ASIA AND THE PACIFIC"

Core Content

This document outlines the key management issues associated with low-volume rural roads (LVRRs) in Asia and the Pacific, emphasizing their role in sustainable development and the need for tailored strategies. It is a publication by the Asian Development Bank (ADB) and focuses on the importance of LVRRs in supporting rural communities and achieving the Sustainable Development Goals (SDGs).

Main Purpose

The document serves as an awareness-raising tool to assist in the implementation of effective LVRR programs. It highlights the strategic importance of LVRRs in:

Enhancing the efficiency of the overall transport network
Integrating rural populations into national development programs
Supporting agricultural development and food security
Promoting rural enterprise and economic growth
Contributing to more than half of the SDGs
Aligning with ADB's Strategy 2030 operational priority 5

Key Management Issues

Strategic Challenges

Separate road authorities: In some countries, such as Cambodia and Myanmar, LVRRs are managed by different authorities, leading to fragmented approaches.
Single road authority: In other countries, like Lao PDR and Vietnam, LVRRs may be given lower priority in central management.
Design and construction constraints: Competing budgets and varying design needs complicate LVRR management.
Lack of standards and specifications: There is a need to develop locally appropriate and efficient standards.
Local technical constraints: Technical capacity varies across countries and areas.
Differing viewpoints: Central authorities often see LVRRs as the "last mile," while rural authorities may view them as the "first mile."

Strategic Issues

Policy framework: An appropriate national transport policy is essential to guide LVRR investment and management.
Road environment and its impacts: The performance of LVRRs is influenced by a range of environmental factors.
Sustainability: Ensuring LVRRs are financially, technically, and environmentally sustainable is crucial.
Classification and standards: Proper classification helps in defining appropriate design and management approaches.
Climate resilience: Climate change significantly impacts LVRRs and requires integrated, holistic strategies.

Implementation Considerations

Strategic decisions: These should be based on accurate traffic and environmental data.
Local material use: Utilizing local resources can reduce costs and improve sustainability.
Fit-for-purpose design: LVRRs must be designed to meet local needs rather than following HVR standards.
Whole life costing: Cost-effective management requires consideration of long-term costs and maintenance.
Appropriate technology: Technology choices should be based on local conditions and resources.
Road safety: Safety must be integrated into the design and maintenance process.
Quality management: Ensuring quality is essential for the durability and performance of LVRRs.
Asset preservation: Maintenance should be prioritized over new construction to ensure long-term sustainability.

ADB's Role in LVRR Development

ADB recognizes the strategic importance of LVRRs in achieving development goals and has developed a framework to support their management. The document aligns LVRR initiatives with ADB's Strategy 2030, which emphasizes rural development and food security. It also outlines the need for ADB to engage with developing member countries (DMCs) in a comprehensive and informed manner.

Key Characteristics of LVRRs

Characteristics	Description
Task-based	LVRRs should suit the road function and its traffic (people and vehicles).
Environmentally compatible and safety	LVRRs must be compatible with the local road environment, including materials, labor, and environmental factors.
Local resource-based	LVRRs should be adapted to the local road environment and use available resources.
Affordable	Whole life asset costs must be estimated to avoid budget exhaustion and excessive maintenance burdens.

Sustainability Framework and Issues

Issue	Requirement
Politically and policy supported	The road program must align with national policies and be supported at all levels.
Environmentally sustainable	Road construction and maintenance should not cause significant environmental damage.
Financially sound	Adequate funding mechanisms must be in place for the entire lifecycle of the road.
Technically appropriate	Designs must be based on local needs, constructible with available resources, and maintainable.
Socially acceptable	Projects must be inclusive and consider the needs of vulnerable groups.
Institutionally possible	Projects must be feasible within the available technical and managerial capacity.
Economically viable	The benefits of the program must outweigh its costs.

Climate Impact on LVRRs

Climate change poses significant risks to LVRRs due to their lower design standards and vulnerability to poor maintenance. Key climate impacts include:

Increased heat: Deterioration of pavement integrity, thermal expansion of bridges, and corrosion of steel reinforcements.
Decreased precipitation: Increased surface salt levels in concrete structures.
Temperature changes in cold areas: Road subsidence, weakening of bridge supports, and reduced ice loading.
Seasonal changes: Increased freeze-thaw conditions and reduced pavement deterioration.
Sea level rise and storm surges: Flooding, coastal erosion, and damage to infrastructure.
Intense precipitation events: Flooding, scouring, landslides, and overloading of drainage systems.

Conclusion

Effective management of LVRRs requires a holistic and integrated approach that considers policy, design, sustainability, climate resilience, and local conditions. The document provides a comprehensive framework for addressing these challenges and supports ADB's efforts to promote rural development and food security through strategic LVRR programs.

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