Moorooduc Road was duplicated to just south of Sages Road in the 1970s, and during the 1980s the rest of the road was duplicated to
Tuerong, to serve as an alternative to building a Frankston Bypass. The road was eventually linked directly to the southern part of Mornington Peninsula Freeway when it was extended to Tuerong in 1994. Moorooduc Highway (as its constituent roads) was allocated Metropolitan Route 11 from
Frankston to
Baxter in 1965; it was extended further south along Moorooduc Road and eventually onto the southern sections of the Mornington Peninsula Freeway in 1989, shifting from Moorooduc Road to the freeway when it was extended further north to Tuerong in 1994. With Victoria's conversion to the newer alphanumeric system in the late 1990s, Metropolitan Route 11 was replaced by route C777 between Frankston and Frankston South, and route C784 between Frankston South and Tuerong, when Peninsula Link opened in 2013 (and was itself allocated route M11). The passing of the
Transport Act 1983 (itself an evolution from the original
Highways and Vehicles Act 1924) provided for the declaration of State Highways, roads two-thirds financed by the state government through the
Road Construction Authority (later
VicRoads). The
Moorooduc Highway was declared a State Highway in March 1990, from the
Frankston Freeway along McMahons Road and Frankston-Flinders Road in Frankston through
Frankston South, and Moorooduc Road to
Tuerong. However all roads were known (and signposted) as their constituent parts. 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 declared this road as the
Mornington Peninsula Route (previously Arterial #6600), While the road is still presently known (and signposted) as its constituent parts, signs replaced along Moorooduc Road since the opening of Peninsula Link have been prominently renamed as Moorooduc Highway. The section of Moorooduc Road south of Tuerong was renamed Old Moorooduc Road.
Peninsula Link (Frankston Bypass) Moorooduc Highway initially acted as an arterial road link between the northern and southern sections of the
Mornington Peninsula Freeway; since Peninsula Link opened to traffic in 18 January 2013, Moorooduc Highway now carries local traffic, while Peninsula Link primarily carries through traffic and bypasses congested roundabout intersections near Mornington as well as the intersections through Frankston, improving traffic flow in these areas. ==Major intersections==