1950s as a means of opening up the area east of High Street towards Darebin Creek for residential development. The proposed route was a branch line from Alphington station to East Reservoir. The proposed line consisted of five stations and several bridges which meant that the line would not interfere with any road traffic. The proposed cost was approximately £250,000. A new Eltham North station, between the existing Eltham and Diamond Creek stations, has been proposed to provide improved access for local residents. However, the proposal has been criticised due to its potential to encourage urban sprawl in undeveloped areas. Eastern suburbs Lilydale line Extension of the Lilydale line to Coldstream station by re-electrifying part of the closed Healesville line was first proposed in the 1969 Melbourne Transportation Plan. Yarra Ranges Council provided for a new station and stabling yard in Coldstream with its 2015 precinct structure plan, but cited advice from PTV that the extension was unlikely to occur. An additional station at Cave Hill, between Mooroolbark and Lilydale, has been proposed by Yarra Ranges Council to support residential development in the area. Rowville A railway line to the suburb of Rowville has been proposed repeatedly since its appearance in the 1969 Melbourne Transportation Plan, and was included in the PTV Network Development Plan. A 2012 feasibility study and a 2016 Infrastructure Victoria report rejected the project as a poor use of funds, but public transport advocates continue to favour a heavy rail line, particularly to serve the nearby Monash University campus. In 2018 the State Government instead proposed a light rail service along the route. It was expected to have a business case complete by 2019, though that year local councils expressed concern the project had stalled. Knox In their 2018 Melbourne Rail Plan, the Rail Futures Institute proposed an underground extension of the Glen Waverley line to Knox City in Wantirna South. Alamein line The 1940 Ashworth Improvement Plan identified future works to extend the Alamein line to East Malvern. Extending the Alamein line to Oakleigh, along the old Outer Circle line reservation, primarily to serve Chadstone Shopping Centre. South-eastern suburbs South-East Fast Line In their 2018 Melbourne Rail Plan, the Rail Futures Institute proposed that by 2035 a new express line should be built from Southern Cross to Caulfield, Chadstone, Monash, Dandenong and Pakenham, with new stations at Chadstone and Monash. Frankston and Stony Point line