A 1994 study by Kearney – Sinclair Knight for the State Rail Authority of NSW entitled 'Review of Investment Options – Casino to Murwillumbah line' did not favour the extension of the line to Robina. It found the mooted connecting line between Robina in the Gold Coast and Murwillumbah would merely reinforce this existing poor targeting of the service and that "...the present population density in the area is too low to provide adequate benefit to cost ratios on investments in the line.