Mobility is important factor of welfare. Therefore, the European Community must be able to provide its citizens and the commercial sector with a safe, efficient and reliable transport system. This system must be accessible to everyone under the same conditions, and must contribute towards country-ward employment and growth with the secure of nature. The transportation sector, led by the automobile, has been cited constantly as a major contributor through human intervention to climate change. In future, greenhouse gas emission and global warming will be key issues for society. Short of banning car use, the challenge remains one of understanding better what mix of actions might contribute in non-marginal ways to reducing the growth of greenhouse gas emissions and the absolute amount of CO2 produced by automobiles. This paper evaluates road transport efficiency, sustainability and equity, focusing on social surplus gains in addition to cost effectiveness; but in particular the ability to reduce CO2. Since one of the biggest challenges the community faces is to effectively reduce greenhouse gas emissions, this presupposes a transport-efficient society.