There are 1.18 million km of highways in China, including 68 national highways and more than 1,600 provincial highways. The nation is going full steam ahead in the construction of expressways and first and second-grade motor roads. Construction of expressways and first and second-class highways for the nation's tourism industry is in high swing. Provincial capital cities are highway passenger transport centers that operate regular bus services to and from various prefectures, cities, counties and towns in their respective provinces and autonomous regions. The numbers of tourist buses in large and medium-sized cities and sleeper-buses that run across provincial boundaries are on the increase.