The spread of development generating a significant level of car commuting is neither environmentally nor economically sustainable. Ireland is now the most car-dependent society in the world, despite insurance costs that have more than doubled in the past two years. The key elements in the efficiency of cities are: size; the speed at which people and goods are moved; the sprawl or relative location of jobs to homes. Achieving efficiency is these three categories determines the efficiency of the city's productivity and competitiveness. Dublin, unfortunately, displays signs of critical inefficiency in all three areas. If this is not rectified, it faces economic strangulation. The motion tabled by the Progressive Democrats does not go any way towards alleviating the serious traffic problems in the city. I understand the Progressive Democrats have a plan B, to use the Luas line for buses. Perhaps we will hear an elaboration on this.