In the context of current discussions about climate protection goals and particulate matter emissions, pollution free traffic concepts continuously attain increasing importance. In urban and suburban areas local public transport can provide a crucial contribution to climate protection goals through a substantial reduction of harmful and greenhouse gas emissions. Local public transport has to fulfill the following requirements in the future:
- Reduction of the primary energy consumption of public transport vehicles,
- Decrease of climate and health-relevant emissions of public transport,
- Decrease of the life cycle costs of emission-free propulsion technologies compared to means of local public transport with overhead lines,
- Long-term reductions of pollutant emissions caused by traffic, particularly in critical metropolitan areas and thus increase of the attractiveness of local public transport as a clean, efficient and low noise transport system.