Seoul: South Korean railway workers will kick off a "work-to-rule" protest this week to demand higher pay and a bigger workforce, railway officials said Sunday. According to Yonhap News Agency, the Korean Railway Workers' Union announced that it will commence the work-to-rule industrial action starting Monday. This form of protest is expected to cause delays in some train services across the country. Delays are particularly anticipated on subways within the capital Seoul area. Additionally, both regular and KTX high-speed train services could experience disruptions due to the slowdown, as reported by Korea Railroad Corp. The union has also indicated plans to escalate their actions by launching an indefinite strike early next month. The demands include the addition of more workers and a 2.5 percent increase in basic salary.