The rapid growth of vehicles in the region has contributed to economic development and welfare. It is clear, however, that the growth of traffic presents three main problems:

• Congestion - Roads in Asian cities are becoming increasingly congested
• Pollution - Air quality in Asian cities are among the worst in the world
• Road safety - Asian and Pacific Region accounts for almost half of all accident deaths in the world

These problems have a negative impact on the economic and social devlopment of countries in the region. They result in billions of dollars in medical expenses and lost productivity.

Tackling these problems requires a comprehensive approach. Policies, enforcement, and legislation need to be strengthened. Institutional coordination should be improved. Better monitoring systems are required. And in many cases, there is a need for more better-trained staff.

A comprehensive strategy includes four key components:

1. Increasingly stringent emissions standards for new vehicles
2. Specifications for clean fuels
3. Programs to assure proper maintenance of in-use vehicles
4. Traffic and demand management

ADB is keen to support its member countries in the implementation of actions that will reduce air pollution. In February 2001, the Clean Air Initiative for Asian Cities was jointly launched by ADB and the World Bank to help with information exchange on air quality management and to galvanize cities in Asia into further action.