Older gasoline vehicle

The situation and circumstances regarding older vehicles differ significantly among different countries. However, several general conclusions appear warranted. Many developing countries have large populations of older uncontrolled vehicles that make a disproportionate contribution to their air pollution problems. For these countries, control efforts will need to be focused on these vehicles if rapid progress in reducing emissions is to be achieved.

Older vehicles tend not to be a serious problem at present in many rapidly industrializing developing countries such as China however, because vehicles remain very valuable one can foresee problems in the future as these vehicles age. In some countries, especially those in Central and Eastern Europe, the large and rapid influx of used vehicles in recent years appears to have created a special problem. As these vehicles age, it is likely that they will create long term problems unless those are addressed. Many countries could benefit from an increased focus on control strategies addressing older vehicles.