All traffic carriers (street, rail, air) are more and more reaching their limits of capacity. This leads to traffic jams on the streets, standing places on the trains, and economic damages. The limits of capacity are typically restricted to a few peak hours a day.

  • To what extent should the limits of capacity be reduced by an expansion of infrastructure and/or by influence on the demand (flattening peak traffic)?
  • What are the financial and ecological limits as to expansion?
  • What means shall be applied to regulate the demands: voluntary measures of economy and society, price signals, etc.?