Road According to the New York State Thruway Authority, some sample per-mile costs to construct multi-lane roads in several US northeastern states were: The United States has the largest network of roads of any country with as of 2009. The Republic of India has the second largest road system in the world with 4,689,842 kilometres (2,914,133 mi) of road (2013). The People's Republic of China is third with of road (2007). The Federative Republic of Brazil has the fourth largest road system in the world with (2002). See List of countries by road network size. When looking only at expressways the
Water crisis in the Democratic Republic of the Congo DRC are dominated by the Congo River and its tributaries. With a mean flow of around 41,000 m³/s, the Congo River has the second largest discharge volume in the world. The Congo River basin accounts for 98 percent of the country's surface area and provides the country with one of the most extensive river networks in the world. The quality of surface waters is generally very good, with the exception of localized pollution hotspots in urban centres and near mining operations. The high water quality is mostly a result of the high dilution capacity of the river network, the low