There are approximately  of serviceable roadway in France, ranking it the most extensive network of the European continent. The Paris region is enveloped with the most dense network of roads and highways, which connect it with virtually all parts of the country. French roads also handle substantial international traffic, connecting with cities in neighboring Belgium, Luxembourg, Germany, Switzerland, Italy, Spain, Andorra and Monaco. There is no annual registration fee or road tax; however, usage of the mostly privately owned motorways is through tolls except in the vicinity of large communes. The new car market is dominated by domestic brands such as Renault, Peugeot and Citroën. France possesses the Millau Viaduct, the world's tallest bridge, and has built many important bridges such as the Pont de Normandie. Diesel and gasoline fuelled cars and lorries cause a large part of the country's air pollution and greenhouse gas emissions.