Seoul is among the world leaders in Internet connectivity, being the capital of South Korea, which has the world's highest fiber-optic broadband penetration and highest global average internet speeds of 26.1 Mbit/s. Since 2015, Seoul has provided free Wi-Fi access in outdoor spaces through a 47.7 billion won ($44 million) project with Internet access at 10,430 parks, streets and other public places. Internet speeds in some apartment buildings reach up to 52.5Gbit/s with assistance from Nokia, and though the average standard consists of 100 Mbit/s services, providers nationwide are rapidly rolling out 1Gbit/s connections at the equivalent of US$20 per month. In addition, the city is served by the KTX high-speed rail and the Seoul Subway, which provides 4G LTE, WiFi and DMB inside subway cars. 5G will be introduced commercially in March 2019 in Seoul.