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Better Air Quality (BAQ) 2008
was held in Bangkok, Thailand
12-14 November 2008

Join the CAI-Asia Partnership

Two and Three Wheelers

In the past few decades, motorized two- and three-wheelers have grown exponentially and repercussions are being felt on urban roads across Asia. For too long, policymakers have considered this as a transition phase; they have often swept the issue under the carpet and have never faced the issue head-on. During the Better Air Quality 2008 conference recently held in Bangkok (, experts from across the world compared research notes, exchanged ideas and debated the exact role that two- and three-wheelers should have in Asia. Although to date there have been few studies on two- and three-wheelers, many experts opined that policies addressing these types of vehicles have been contradictory. For example, some policymakers believe in "leap frog" theories, hoping that the challenges would resolve itself in due time.

Exclusive Lanes for Two and Three Wheelers

With Increasing population and number of vehicles in Asian cities, the demand of more space has been the most common debated issue. With increasing environmental and climate implications, cities have realized that they cannot sustain the vehicle growths by providing more space. With available road space being contested by all modes, often the slower and non motorized modes lose out. Read more

Motorized Two- and Three-Wheelers in Asia – What Do We Know?Motorized Two- and Three-Wheelers in Asia – What Do We Know?
[.pdf, 455.6Kb]

By Sudhir Gota and Bert Fabian, Clean Air Initiatives for Asian Cities (CAI-Asia) Center

Malaysian Motorcycle Transportation InfrastructureMalaysian Motorcycle Transportation Infrastructure
[.doc, 1090Kb]

By Dr. Horizon Gitano, Department of Mechanical Engineering, Universiti Sains Malaysia

Two and Three Wheelers Presentations - BAQ 2008

  • Recommendations of Pre-Event on Two and Three Wheelers

    [.pdf, 9.3Kb]

  • Luc Nadal
    Why a 2 & 3 Wheeler study?

    [.pdf, 4060.8Kb]

Available documents
Other Topics
Measuring impacts
Climate change
Transboundary Air Pollution
Policies and instruments
Mobile sources
Stationary sources
Area sources
Education and awareness
Socio-economic context
Institutions and Information Systems

Secretariat: CAI-Asia Center, 3510 Robinsons Equitable Tower, ADB Ave., Ortigas Center, Pasig City, Philippines 1605
Tel: +632 3952843 to 45 / Fax: +632 3952846