at grade. Because of the location of the overpass relative to the branch to Kooragang Island, a short section of the line has 6 parallel tracks. The bridge carrying Sandgate Road over the lines had to modified to allow for the additional lines. Sandgate station is flanked by a pair of coal tracks on each side. As part of the Rail Clearways Program, in August 2006 an additional platform was opened at Berowra, and in March 2009 an additional platform and passing loop was opened at Hornsby. In 2011, the Northern Sydney Freight Corridor project commenced to improve access for freight trains. This has seen the completion of a loop at Hexham in June 2012, two loops between Gosford and Narara in February 2015, plus an underpass and loop between North Strathfield and Rhodes in June 2015. A third track between Epping and Thornleigh was completed in June 2016. Engineering heritage award The Great Northern Railway received a Historic Engineering Marker from Engineers Australia as part of its Engineering Heritage Recognition Program. See also Central Coast & Newcastle Line Rail transport in New South Wales Sydney–Brisbane rail corridor Woy Woy Tunnel References External links ARTC maps of rail network outside Railcorp controlled zone (Sydney) Curve and gradient data for all lines including some closed lines 1857 establishments in Australia Hornsby Shire Liverpool Plains Shire Rail transport in the Hunter Region Railway lines opened in 1857 Railway lines opened in 1888 Recipients of Engineers Australia engineering heritage markers Regional railway lines in New South Wales Standard gauge railways in Australia Tenterfield Shire