included installation of hundreds of new in-road sensors on the freeway with associated access point poles, data stations and CCTV cameras. It is completely integrated with the M1 Monash Freeway. Timeline of development 1972: Mulgrave and Eumemmerring Freeways, total from Princes Highway, Eumemmerring to Stud Road, Dandenong North, opened by the Governor of Victoria Sir Rohan Delacombe, 21 November 1972, total cost A$6.8 million. 1976: South Gippsland Freeway, dual carriageways completed between Princes Highway and Pound Road, Hampton Park, as well as the southbound carriageway to Dandenong-Hastings Road, opened 6 December 1976 at a cost of $12 million. 1977/78: Northbound carriageway from Pound Road to Dandenong-Hastings Road completed. 2011: Pound Road interchange reconstruction, opened late 2011. Road classification The freeway was signed Freeway Route 81 upon its opening in 1972, until its replacement with National Route 1 in 1988 (with a portion of it renamed to the South Eastern Arterial) until the Princes Highway in Eumemmering, and the remaining stretch between Eumemmering and Lyndhurst Interchange allocated Metropolitan Route 65. With Victoria's conversion to the newer alphanumeric system in the late 1990s this was replaced by routes M1 and M420 respectively. When the Hallam bypass opened and route M1 reallocated along it in 2003, route M420 was officially extended north to the new junction with the Monash Freeway. The passing of the Road Management Act 2004 granted the responsibility of overall management and development of Victoria's major arterial roads to VicRoads: in 2004, VicRoads re-declared South Gippsland Freeway (Freeway #1310) from Monash Freeway at Doveton to Western Port Highway in Lynbrook. Exits See also Freeways in Australia Freeways in Melbourne Road transport in Victoria References Highways and freeways in Melbourne Transport in the City of Greater Dandenong Transport in the City of Casey