The Regional Express Line envisaged in the Railway Development Strategy 2000 proposed by the Hong Kong Special Administrative Region Government (HKSAR Government), has now become the Hong Kong section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link (Express Rail Link). In April 2008, the HKSAR Government asked the MTR Corporation to carry out further planning and design of the Express Rail Link. Subsequently, the HKSAR Government gazetted the Scheme for the Express Rail Link under the Railways Ordinance to collect public views.
On 20 October 2009, the Chief Executive in Council authorized the Scheme and the Amendments of the Scheme of the Express Rail Link. On 16 January 2010, the Finance Committee of the Legislative Council approved the funding application for the construction of the Express Rail Link. The construction commenced in late January 2010 with the target Programme to Complete to the third quarter of 2018.