   the eastern suburbs & illawarra line (numbered t4, coloured azure blue) is a commuter railway line in the eastern and southern suburbs of sydney, australia and is a part of the sydney trains network. the line was constructed in the 1880s to wollongong to take advantage of agricultural and mining potentials in the illawarra area. in march 1926 it became the first railway in new south wales to run electric train services. today the railway consists of three connected lines: *the original illawarra line from the sydney cbd to waterfall *the cronulla line from sutherland to cronulla which opened in 1939 replacing an earlier tram service *the eastern suburbs line from the sydney cbd to bondi junction which opened in 1979 operationally and historically, the entire line from the illawarra junction at redfern to its terminus in bomaderry on the south coast was known as the illawarra line. however since 1989 cityrail has marketed the suburban services to waterfall and cronulla as the illawarra line and interurban services south to wollongong and bomaderry as the [[south coa
CityRail Railway_lines_in_Sydney Railway_lines_opened_in_1884 Standard_gauge_railways_in_Australia Sydney_Trains