This is a webcam showing M4, St Marys, located in Sydney, Australia.The M4 Motorway is a 50.2-kilometre-long dual carriageway partially tolled motorway in Sydney, New South Wales, Australia that is designated with the M4 route. The M4 designation is part of the wider A4 and M4 route designation, the M4 runs parallel/below ground to the Great Western Highway and Parramatta Road.
