It also may harm families. This new combination of objectives has complex implications on the financial model that could help Korean cities cope with such evolving demand. Although only 6.8% of the overall transport infrastructure in Korea is more than 30 years old (as of 2014),9 this share will rise to 30% by 2030 and the corresponding maintenance costs are expected to increase by 6.1% per annum by 2030 (Kim, 2016).