Highway
Major highways are often named and numbered by the governments that typically develop and maintain them. Australia's Highway 1 is the longest national highway in the world at over and runs almost the entire way around the continent. China has the world's largest network of highways followed closely by the United States of America. Some highways, like the Pan-American Highway or the European routes, span multiple countries. Some major highway routes include ferry services, such as U.S. Route 10, which crosses Lake Michigan.
Transport in Finland
64% of all traffic on public roads takes place on main roads, which are divided into class I ("/") and class II ("/") main roads. Motorways have been constructed in the country since the 1960s, but they are still reasonably rare because traffic volumes are not large enough to motivate their construction. There are of motorways. Longest stretches are Helsinki–Turku (Main road 1/E18), Helsinki–Tampere (Main road 3/E12), Helsinki–Heinola (Main road 4/E75), and Helsinki–Hamina (Main road 7/E18). The world's northernmost motorway is also located in Finland between Keminmaa and Tornio (Main road 29/E8).