Kaesong. Pyongyang railway station serves the main railway lines, including the Pyongui Line and the Pyongbu Line. Regular international rail services to Beijing, the Chinese border city of Dandong and Moscow are also available. A rail journey to Beijing takes about 25 hours and 25 minutes (K27 from Beijing/K28 from Pyongyang, on Mondays, Wednesdays, Thursdays and Saturdays); a journey to Dandong takes about 6 hours (daily); a journey to Moscow takes six days. The city also connects to the Eurasian Land Bridge via the Trans-Siberian Railway. A high-speed rail link to Wonsan is planned. The Metro, tram and trolleybus systems are used mainly by commuters as a primary means of urban transportation. Cycle lanes were introduced on main thoroughfares in July 2015. There are relatively few cars in the city. Cars are a symbol of status in the country due to their scarcity as a result of restrictions on import because of international sanctions and domestic regulations. Some roads are also reported to be in poor condition. However, by 2018, Pyongyang had begun to experience traffic jams. State-owned Air Koryo has scheduled international flights from Pyongyang Sunan International Airport to Beijing (PEK), Shenyang (SHE), Vladivostok (VVO), Shanghai (PVG) and Dandong. The only domestic destinations are Hamhung, Wonsan, Chongjin, Hyesan and Samjiyon. Since 31 March 2008, Air China launched a regular service between Beijing and Pyongyang, although Air China's flights are often canceled due to lack of passengers. Education and science Kim Il-sung University, North Korea's oldest university, was established in 1946. It has 21 faculties, 4 research institutes, and 10 other university units. These include the primary medical education and health personnel training unit, the medical college; a physics faculty which covers a range of studies including theoretical physics, optical science, geophysics and astrophysics; an atomic energy institute and the largest law firm in the country (Ryongnamsan Law Office). Kim Il-sung University also has its own publishing house, sports club (Ryongnamsan Sports Club), revolutionary museum, nature museum, libraries, a gym, indoor swimming pool and educator apartment houses. Its four main buildings were completed in 1965 (Building 1), 1972 (Building 2), and 2017 (Buildings 3 and 4). Other higher education establishments include Kim Chaek University of Technology, Pyongyang University of Music and Dance and Pyongyang University of Foreign Studies. Pyongyang University of Science and Technology (PUST) is the country's first private university where most of the lecturers are American and courses