South Gippsland Freeway is a short freeway linking Dandenong in Melbourne's south–east to other south–eastern destinations, including the Mornington Peninsula and the Gippsland region. The freeway bears the designation M420. Route South Gippsland Freeway starts at the interchange with Monash Freeway in Endeavour Hills and runs south as a four-lane, dual-carriageway route, under the Princes Highway at Eumemmering, over the Pakenham railway line, then along the western border Hampton Park until it ends at the interchange with the South Gippsland and Western Port Highways in Lynbrook. The standard travel time on the South Gippsland Freeway is 4 minutes (city-bound) and 3 minutes (Lynbrook-bound). The usual peak period travel time, is between 6–8 minutes. However, in times of extreme congestion or roadworks, including being residual due to an incident, the travel time can well exceed 10 minutes. History Plans for a "Mulgrave By-pass Road and Eumemmerring By-pass Road" had been made as far back as 1966, between Warrigal Road in Chadstone and Princes Highway at Eumemmerring. The freeway began as an overflow from construction of Mulgrave Freeway (now Monash Freeway) in 1970, where the freeway entered a sweeping turn south, crossed Eumemmerring Creek in Doveton and officially terminated at Princes Highway in Eumemmerring: this section opened in 1972 as Eumemmering Freeway, and was later renamed South Gippsland Freeway in April 1974. The freeway was extended 2.5 kilometres further south to terminate at the original alignment of the South Gippsland Highway where it met Pound Road in 1976. The last extension 3.5 kilometres south connected Pound Road to Lyndhurst, where Lyndhurst Road (renamed Dandenong-Hastings Road not long afterwards) met the South Gippsland Highway. The highway's old alignment was duplicated and upgraded into the new stretch of the freeway, and a new dual-carriageway alignment of the South Gippsland Highway was constructed approximately a kilometre to the freeway's west. Pound Road was extended a few hundred metres west across a new bridge over the freeway, with Dandenong-bound ramps. Lyndhurst Interchange, where the freeway and the old and new alignments of the South Gippsland Highway met, was reconstructed to allow traffic to head south via an overpass above the realigned South Gippsland Highway to Dandenong-Hastings Road. Extensions to the Mulgrave Freeway – renamed the South Eastern Arterial in 1988, subsuming the section between Doveton and Eumemmering – also resulted in heavier use of the South Gippsland Freeway. The bridge over Lyndhurst Interchange was duplicated with