Various programs that aim to minimize air and noise pollution from the transport sector are being implemented. These programs are usually conducted in areas with large and dense population or areas where flow of traffic and people are heavy. The aim is to improve air quality via the application of command and control schemes or market based instruments in the transport sector. Interventions could also involve introduction of alternative technologies (e.g. electric buses) or arrangements (e.g. limitation on number of vehicles via coding schemes).
The Environment Impact Assessment is ideally an integral component of a project's planning process. It identifies potential risks given the present scenario and the perceived impact of the project's activities. Given this, the EIA gives recommendations given the set of information available during the time of the assessment. However, once the project takes place, a review of the EIA is seldom made. There is a need to revisit the EIA especially if perceived environment conditions change.