Source: World Bank, Logistics Performance Index. Urban population data from United Nations, World Urbanization Prospects: The 2007 Revision Population Database.
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World's Major Cities and the Logistics Performance Index, 2010
The logistical performance of urban freight distribution requires a comparative framework and key performance indicators. However, such a framework does not yet exist, but one has been compiled at the national level by the World Bank;  the Logistics Performance Index (LPI). While the LPI reflects global trade and supply chains, it can also be reflective, to some extent, of the logistical capabilities of cities. By cross-referencing a dataset composed of the world's 435 cities of more than 1 million inhabitants (totaling 1,257 million) with their respective national LPI values it is possible to categorize cities by their nation's LPI. 27% of the urban population lived in cities within countries with a low LPI (less than 3) while 47% lived in cities with below average LPI conditions (between 3 and 3.5). Only 26% of the urban population were living in cities with adequate national LPI conditions (more than 3.5). In countries with high LPIs, such as the United States, supply chains tend to be extensive and covering large markets areas, while in countries with low LPIs supply chains tend to be shorter and more unreliable. This is also reflected in city logistics with cities in high LPI countries having extensive urban freight distribution systems while cities in countries with low LPIs having urban freight distribution systems that a more simple and inefficient. Such an assessment should be interpreted with caution as significant differences may exist between cities of the same nation. For instance, port and airport cities tend to have more capabilities for city logistics because of their infrastructure and distribution capabilities.