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Calder Highway
Calder Highway
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Calder Highway is a rural highway in Australia, linking Mildura and the Victoria/New South Wales border to Bendigo, in North Central Victoria. South of Bendigo, where the former highway has been upgraded to freeway-standard, Calder Freeway links to Melbourne, subsuming former alignments of Calder Highway; the Victorian Government completed the conversion to freeway standard from Melbourne to Bendigo on 20 April 2009.

Key Information

Calder Alternate Highway connects to Calder Highway at either end – just north of Ravenswood, and at Marong – and provides a bypass west of Bendigo.

Route

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Calder Highway commences at the intersection with Silver City Highway in Curlwaa (officially a branch of Silver City Highway, yet sign-posted as Calder Highway) and crosses the Murray River into Victoria over the Abbotsford Bridge, then continues in a southeasterly direction as a two-lane, single carriageway rural highway through Merbein and intersects with Sturt Highway just outside the major regional town of Mildura, where widens to a four-lane, dual-carriageway road through southern Mildura and Irymple, in the state's north-west. It narrows back to a two-lane single carriageway road and continues in a southerly direction, meeting Mallee Highway at Ouyen, then in a south-easterly direction through Sea Lake, Wycheproof, Charlton and meeting the northern end of Calder Alternative Highway at Marong eventually to the western suburbs of Bendigo, where it widens to a four-lane, dual-carriageway road as it weaves through the rural city, intersecting with Loddon Valley Highway and meeting with Midland Highway, where it narrows back to a single carriageway road and shares a concurrency through south-western Bendigo, widening again to a dual carriageway through Kangaroo Flat to eventually meet the southern end of Calder Alternative Highway at an interchange in Ravenswood.

Calder Highway becomes Calder Freeway at the Ravenswood interchange and continues in southerly direction as a four-lane, dual-carriageway rural freeway which bypasses the towns along the highway's former alignment. Calder Freeway passes Harcourt - where the shared concurrency with Midland Highway ends, as it travels in a south-westerly direction to the major regional centres of Castlemaine, Ballarat, and Geelong - and continues in a south-easterly direction past Elphinstone, Kyneton, Woodend and Gisborne, to reach the western suburban fringe of Melbourne. It continues in a south-easterly, and then easterly, direction past Calder Park Raceway and Keilor, before eventually terminating at an interchange with Tullamarine Freeway at Airport West.

Within the urban section of Calder Freeway (between Kings Road and Tullamarine Freeway), the standard travel time, in each direction, is 10 minutes; 5 minutes between Kings Road and the Western Ring Road and 5 minutes between the Ring Road and Tullamarine Freeway.

Between Red Cliffs and Wycheproof the highway has a speed limit of 110 km/h.

History

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The passing of the Country Roads Act of 1912[5] through the Parliament of Victoria provided for the establishment of the Country Roads Board (later VicRoads) and their ability to declare Main Roads, taking responsibility for the management, construction and care of the state's major roads from local municipalities. (Melbourne-)Bendigo Road was declared a Main Road over a period of months, from 30 December 1913 (Castlemaine via Harcourt to Ravenswood),[1] to 30 November 1914 (from Keilor through Diggers Rest to Gisborne, and from Woodend through Kyneton and Elphinstone to Castlemaine),[6] to 20 September 1915 (from Ravenswood to Bendigo);[7] (Ouyen-)Mildura Road from Ouyen to Hattah, and Wycheproof-Sea Lake Road from Wycheproof to Sea Lake were declared Main Roads on 14 December 1914;[8] and (Charlton-)Wycheproof Road between Charlton and Wycheproof was declared a Main Road on 28 May 1915;[9] Charlton-(Bridgewater-)Bendigo Road was declared a Main Road, between Bridgewater and Wedderburn to Charlton on 28 May 1915,[9] and between Bendigo and Bridgewater on 20 September 1915;[7] and (Ouyen-)Sea Lake Road was declared a Main Road, from Ouyen to Mittyack on 14 December 1914,[8] and between Mittyack and Sea Lake on 1 October 1921.[10]

The passing of the Highways and Vehicles Act of 1924[11] provided for the declaration of State Highways, roads two-thirds financed by the State government through the Country Roads Board. North Western Highway was declared a State Highway on 1 July 1925,[2][12] cobbled from a collection of roads from Melbourne through Kyneton, Castlemaine, Bendigo, Sea Lake and Ouyen to Mildura (for a total of 324 miles), subsuming the original declarations of Melbourne-Bendigo Road, Charlton-Bridgewater-Bendigo Road, Charlton-Wycheproof Road, Wycheproof-Sea Lake Road, Ouyen-Sea Lake Road and Ouyen-Mildura Road as Main Roads. North-Western Highway was renamed Calder Highway on 18 December 1928, after William Calder, chairman of the Country Roads Board from 1913–28.[13] In the 1959/60 financial year, another section from Elphinstone to Harcourt was added as a deviation bypassing Castlemaine, along the former Elphinstone–Harcourt Road[14] (already having been declared a Main Road by the Country Roads Board in 1937/38 financial year[15]); the previous alignments of Calder Highway from Elphinstone to Castlemaine, and Castlemaine to Harcourt, were subsumed into Pyrenees Highway and Midland Highway respectively. Calder Alternative Highway was declared in 9 May 1983, along the former Ravenswood–Marong Road.[16][17]

Originally, Calder Highway ran through northwestern Melbourne as an undivided highway, through Niddrie as Keilor Road and terminating in Essendon; traffic continued south along Mount Alexander Road to reach central Melbourne. Keilor Road – already heavily congested and supporting a tram line – was eventually bypassed by a freeway-standard road - the first section of Calder Freeway - in 1972 to terminate at a junction with Lancefield Road (later upgraded to Tullamarine Freeway), rejoining Calder Highway at the western end of Niddrie;[18] the freeway-standard was extended further west to East Keilor (the future location of the Western Ring Road interchange) in 1975, and to Keilor by the early 1980s, over time stretching west to ultimately become a project to convert the road to freeway standard all the way to Bendigo; the freeway upgrade has made sections of the original Calder Highway redundant, either subsumed into the new freeway or acting as local access roads.

Calder Highway was later signed National Route 79 in 1955[citation needed]; when Midland Highway was allocated State Route 149 in 1986, it shared it as a concurrency along Calder Highway between Harcourt and Bendigo. With Victoria's conversion to the newer alphanumeric system in the late 1990s this was altered to route A79 for the highway portion, and route M79 for the freeway portion into Melbourne (and the concurrency with Midland Highway was replaced with route A300); the New South Wales section was left unallocated when they switched to the alphanumeric system in 2013. Calder Alternative Highway was signed Alternative National Route 79 between Ravenswood and Marong, and was later replaced by route A790.

The Howard government broadened the criteria under which roads qualify for Commonwealth road funding by introducing Roads of National Importance program in the 1996–97 financial year[19] where such declarations were based on the recognition that roads outside the National Highway system also provide social benefits, and were funded jointly with the States and Territories usually on a 50:50 basis. As a major road link between Melbourne, Bendigo, and the state's northwest, supporting the region's primary manufacturing and tourism industries, Calder Highway was declared a Road of National Importance between Melbourne and Bendigo in December 1996.[20][21]

The passing of the Road Management Act 2004[22] granted the responsibility of overall management and development of Victoria's major arterial roads to VicRoads: in 2004, VicRoads re-declared the road as Calder Alternative Highway (Arterial #6200) between Ravenswood and Marong,[23] and in 2011 as Calder Highway (Arterial #6530) between the border with New South Wales at Yelta and the interchange with Calder Alternate Highway and Ravenswood Street in Ravenswood,[24] and as Calder Freeway (Freeway #1530) between Ravenswood and Tullamarine Freeway, Airport West.[25]

Timeline of construction

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Tullamarine Freeway meets Calder Freeway.
  • 1950–54 – Calder Highway, straightening of the "Hattah deviation", a 21-mile (34 km) circuitous course through Hattah replaced by 14.6 miles (23.5 km) of straight alignment, south of Nowingi, started construction in 1950,[26] was delayed a year in 1952 due to lack of funds,[27] and eventually completed two years later in 1954.[28]
  • 1972 – Calder Freeway, initial 1.2 miles (1.9 km) section of freeway with 3 lanes in each direction, from the Tullamarine Freeway/Lancefield Road intersection to Calder Highway at Niddrie, opened by Minister for Local Government, the Hon. A J Hunt MLC, 21 April 1972, at a cost of $3 million.[18]
  • 1975 – Extended 2 km from The Avenue in Niddrie to Erebus Street in Keilor East, opened December 1974 at a cost of $2.5 million.[29]
  • 1982 – Extended 3.8 km from Erebus Street to Arundel Road, Keilor, with two lanes each direction plus emergency stopping lanes, opened by Minister for Transport, the Hon S M Crabb MP, 18 May 1982, at a cost of $15.5 million.[30]
  • 1984 – Keilor bypass, Bendigo-bound carriageway from Arundel Road to west of Oakbank Road, opened by Assistant Minister of Transport, the Hon Jack Simpson MP, 17 April 1984; the opening of this carriageway completed the bypass of Keilor. The cost of the entire bypass from Erebus Street to west of Oakbank Road was $30 million.[16]
  • 1989 – Gisborne bypass opened 17 March 1989. The 6 km bypass cost A$25m.[31]
  • 1990/1991 – Oakbank Road, Keilor North to Duncans Lane, Diggers Rest. 7.7 km of newly duplicated '2 lane carriageway' opened to traffic at a cost of A$14m. No exact date was given, however VicRoads Annual Reports cover the previous financial year.[32]
  • 1991/1992 – 2 km of duplication completed at Ravenswood during 1991/1992 at a cost of A$1.3m.[33]
  • 1993 – Diggers Rest bypass. $A32m 6.5 km bypass opened to traffic in July 1993, followed by the Vinyard Road interchange in November 1993.[34]
  • 1994 – Ravenswood section. Duplication of the highway completed 'in 1994'[34]
  • 1995 – Kyneton bypass opened to traffic in April 1995, at a cost of A$31m.[35]
  • 1996 – Gap Hill section (Diggers Rest to Millett Road). Opened in May 1996, at a cost of A$32m.[36]
  • 1998 – Gisborne South to Gisborne. 6 km completed at a cost of A$31 and opened to traffic on 3 April 1998.[37]
  • 2000 – Gisborne to Woodend (Black Forest section). 6.8 km section opened to traffic on 17 March 2000. Completed at a cost of A$51m.[38]
  • 2001 – Woodend bypass. 13.5 km bypass opened to traffic on 19 December 2001. The total cost of the project was A$85m.[39]
  • 2003 – Carlsruhe section. 6.5 km section opened to traffic on 16 April 2003, at a cost of A$46m. This section completed the dual carriageways from Keilor to Kyneton.[40]
  • 2005 – 2.5 km north of Kyneton completed in January 2005.[41]
  • 2005 – Ravenswood. 6.5 km duplication south of Ravenswood completed in May 2005[41]
  • 2008 – 15 km Malmsbury section opened in April 2008.[42]
  • 2009 – Harcourt North to Elphinstone opened on 20 April 2009. This 19 km section cost A$404m and completed the duplication of the highway between Melbourne and Bendigo. The project was jointly funded by the state and federal governments.[43]
  • 2012 – Kings Road interchange, opened in January 2012, at a cost of $62 million, jointly funded by state and federal governments.[44]
  • 2018 – Ravenswood (Calder Highway, Calder Freeway and Calder Alternative Highway) interchange, reconstruction started May 2016 and completed in March 2018, at a cost of $86 million, jointly funded by state and federal governments.[45][46]

1969 Melbourne Transportation Plan

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The Calder Highway between the Melton Highway and the Western Ring Road is shown in the 1969 Melbourne Transportation Plan as part of the F4 Freeway corridor, which extends past the Tullamarine Freeway and Bell Street to Templestowe.[citation needed]

Upgrades

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Western Ring Road to Kings Road

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In 2008, VicRoads completed the widening of the Calder Freeway from the Western Ring Road to Melton Highway. The road was widened from 2 lanes each direction to 3 lanes in each direction. The speed limit was reduced permanently from 100 km/h to 80 km/h.[47] The 80 km/h limit applies northbound from Keilor Park Drive to Melton Highway,[48] and southbound it applies from the Green Gully Road bridge to just prior to the Western Ring Road interchange. In October 2010, it was announced that as part of a year long trial, the speed limit on this section of freeway will be increased back to 100 km/h in off-peak times (8pm-5am), with 30 variable speed limits to be installed along the stretch of freeway[citation needed]. A further upgrade completed in 2012 resulted in a new interchange at Kings Road (the freeways's urban / metropolitan limits) and closure of three at grade intersections in the area. Despite these upgrades the 80 km/h speed limit remained in place.

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Major Intersections and Towns

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StateLGALocation[3][24][25]km[3]miDestinationsNotes
New South WalesWentworthCurlwaa0.00.0 Silver City Highway (B79) – Buronga, Wentworth, Broken HillNorthern terminus of highway
Murray River0.4–
0.6
0.25–
0.37
Abbotsford Bridge
State border0.60.37New South Wales – Victoria state border
VictoriaMilduraYelta Calder HighwayNorthern terminus of route A79
Merbein11.37.0 Ranfurly Way (C256) – Mildura
Mildura21.113.1 Sturt Highway (A20 west) – Renmark, AdelaideConcurrency with route A20
23.814.8 Sturt Highway (A20 east) – Mildura, Balranald, Sydney
25.916.1 Benetook Avenue (C255) – Buronga
Red Cliffs38.924.2 Millewa Road (C254) – Werrimull, Meringur
40.124.9 Kulkyne Way (C253) – Colignan
Hattah89.355.5 Hattah–Robinvale Road (C252) – Robinvale
Ouyen123.977.0 Mallee Highway (B12 east) – Piangil, Swan Hill, Balranald, SydneyConcurrency with route B12
124.077.1 Mallee Highway (B12 west) – Pinnaroo, Murray Bridge, Adelaide
134.783.7 Sunraysia Highway (B220) – Birchip, Horsham, St Arnaud, Ballarat
BulokeBimbourie194.0120.5 Patchewollock–Sea Lake Road (C248) – Patchewollock
Sea Lake209.1129.9 Robinvale–Sea Lake Road (C251) – Robinvale
212.4132.0 Sea Lake–Swan Hill Road (C246 east) – Swan HillConcurrency with route C246
212.8132.2 Birchip–Sea Lake Road (C246 west) – Woomelang, Birchip
Dumosa273.7170.1 Donald–Swan Hill Road (C261) – Swan Hill, Donald
Wycheproof288.0179.0 Birchip–Wycheproof Road (C268) – Birchip
289.2179.7 Boort–Wycheproof Road (C267) – Boort
Wycheproof South295.0183.3 St Arnaud–Wycheproof Road (C271) – St Arnaud
Charlton318.3197.8 Borung Highway (C239) – Donald
318.8198.1 Charlton–St Arnaud Road (C272) – St Arnaud
320.1198.9 Boort–Charlton Road (C266) – Boort, Kerang
LoddonWedderburn350.4217.7 Boort–Wedderburn Road (C273 north) – Boort, KerangConcurrency with route C273
350.6217.9 Logan–Wedderburn Road (C273 south) – Logan, St Arnaud
Bridgewater386.1239.9 Bridgewater–Dunolly Road (C274 south) – Dunolly, Maryborough
Bridgewater–Serpentine Road (C274 north) – Serpentine, Kerang
387.0240.5 Bridgewater–Maldon Road (C282) – Maldon, Castlemaine
Greater BendigoMarong409.7254.6 Calder Alternative Highway (A790) – Ravenswood,
to Wimmera Highway – St Arnaud, Horsham
Golden Square420.6261.3 Golden Square–Long Gully Road (C323) – Golden Square, Long Gully
Ironbark422.4262.5 Loddon Valley Highway (B260) – Eaglehawk, Kerang
422.7262.7 Eaglehawk Road – White Hills, Echuca, Shepparton
Bendigo423.6263.2 Don Street (A79 north) – Marong
High Street (A79/A300 west, A300 east) – Bendigo city centre
Myrtle Street (C331 south) – Quarry Hill, Flora Hill
Calder Highway continues north along Don Street, west along High Street
Northern terminus of concurrency with route A300
Golden Square426.2264.8 Oak Street (C323 north, C353 south) – Long Gully, Quarry Hill
Kangaroo Flat428.2266.1 Bendigo–Maryborough Road (C277) – Maryborough
Ravenswood438.7272.6 Calder Alternative Highway (A790 northwest) – Marong, MilduraSouthern terminus of Calder Highway and route A79
Northern terminus of Calder Freeway and route M79
Mount AlexanderRavenswood South–Harcourt North boundary446.8277.6Harmony Way – Harcourt, Elphinstone
Fogartys Gap Road (west) – Maldon
At-grade intersection
Barkers CreekHarcourt boundary452.6281.2 Midland Highway (A300 south-west) – Castlemaine, Ballarat
Victoria Road (north-east) – Harcourt
Southern terminus of concurrency with route A300
Elphinstone465.1289.0 Pyrenees Highway (B180) – Castlemaine, Metcalfe
Macedon RangesMalmsbury479.8298.1 Old Calder Highway (C794) – Malmsbury, Taradale, Elphinstone
Malmsbury East Road (east) – Greenhill
Kyneton483.0300.1 Burton Avenue (C793) – KynetonAt-grade intersection
489.1303.9 Edgecombe Road (C326 north) – Kyneton, Heathcote
491.1305.2 Bourke Street (C793 west) – Kyneton
Trio Road (east) – Carlsruhe
Northbound exit and southbound entrance only
Carlsruhe496.2308.3Springvale Road – Carlsruhe
Woodend North499.8310.6 Macedon–Woodend Road (C792) – WoodendSouthbound exit and northbound entrance only
Woodend504.6313.5 Lancefield–Woodend Road (C324) – Lancefield, Woodend
Macedon511.9318.1 Macedon–Woodend Road (C792) – Macedon, Woodend
518.0321.9 Mount Macedon Road (C322 northeast) – Mount Macedon
Macedon–Woodend Road (C792 northwest) – Macedon
Northbound exit and southbound entrance only
GisborneNew Gisborne boundary520.1323.2 Station Road (C708 north, C791 south) – Riddells Creek, Melton
Gisborne522.9324.9 Melbourne Road (C791 west) – Gisborne
Emmeline Drive (east) – Gisborne East
Macedon Ranges–Hume boundaryGisborne SouthSunbury boundary528.9328.6Couangalt Road (west) – Gisborne South
Mundy Road (east) – Sunbury
Hume–Melton boundarySunburyDiggers Rest boundary533.9331.8 Gap Road (C707) – Sunbury
538.9334.9 Vineyard Road (C706) – Sunbury, Diggers Rest
Diggers Rest542.1336.8Bulla–Diggers Rest Road – Bulla, Diggers Rest
BrimbankCalder ParkKeilor North boundary545.4–
546.3
338.9–
339.5
Holden Road (west) – Toolern ValeNorthbound exit and entrance only
Northbound and southbound access to service centres
547.3340.1Organ Pipes Road – Organ Pipes National ParkAt-grade intersection
548.1340.6Calder Park Drive – Calder ParkNorthbound exit and entrance only
Keilor North–Taylors Lakes boundary549.9341.7 Kings Road (Metro Route 77) – Taylors Lakes, Deer Park, Laverton
Keilor North–Keilor Lodge boundary551.7342.8 Sunshine Avenue (Metro Route 41) – Taylors LakesNorthbound exit and entrance only
Keilor552.8343.5 Melton Highway (C754) – Taylors Lakes, MeltonPartial Y interchange: northbound exit and southbound entrance only
554.7344.7 Green Gully Road (Metro Route 40 south) – Keilor, St Albans
Arundel Road (north) – Tullamarine
Northbound exit and southbound entrance only
Keilor ParkKeilor East boundary557.0346.1 Keilor Park Drive (Metro Route 39) – Keilor Park, Avondale Heights,
to Western Ring Road (M80) – Laverton North, Werribee, Avalon Airport
No northbound exit
558.0346.7 Western Ring Road (M80) – Craigieburn, Seymour, Melbourne AirportPartial turbine interchange
Northbound exit to Western Ring Road southbound, northbound entrance from Western Ring Road southbound only
Southbound exit to Western Ring Road northbound, southbound entrance from Western Ring Road northbound
Access from northbound exit to Keilor Park Drive
Moonee ValleyKeilor East–Airport West boundary558.8347.2Woorite Place – Keilor East, Airport WestNorthbound exit and southbound entrance only
Airport West–Niddrie boundary559.8347.8Fullarton Road (south) – Niddrie
McNamara Avenue – Airport West
Southbound entrance and exit only
560.1348.0Keilor Road – NiddrieNorthbound entrance and exit only
560.5348.3 Bulla Road (Metro Route 37) – Essendon
Airport West–Niddrie–Essendon North tripoint560.9348.5 Tullamarine Freeway (M2) – Flemington, Port MelbourneSouthern terminus of freeway and route M79 at partial Y interchange

See also

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[edit]

References

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Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
The Calder Highway is a major rural highway in Victoria, , designated as State Route A79, spanning approximately 560 kilometres from the New South Wales border near in the northwest to in the southeast, passing through regional centres including , , and Gisborne. It functions as a critical in Victoria's road network, facilitating the transport of freight such as agricultural goods (including grain, citrus, and wine) from the northwest to markets in , , and , while also supporting tourism to historic goldfields, the region, and natural attractions like the Murray-Sunset National Park. The highway carries varying traffic volumes, with (AADT) as of the early ranging from about 1,000 vehicles in remote northern sections to over 10,000 near , including a significant proportion of heavy vehicles. Originally established as part of the North-Western Highway in the early , the route was renamed the Calder Highway in 1928 to honour William Calder (1860–1928), a pioneering and the inaugural Chairman of Victoria's Country Roads Board from 1913 to 1928. Calder surveyed much of the state's main roads network, oversaw extensive construction programs, and advocated for the Highways and Vehicles Act of 1924, which enabled state-funded highway development and transformed rural connectivity during and after the Gold Rush era. The highway's southern portion, from its junction with the Tullamarine Freeway (connecting to ) to south of Castlemaine, has been upgraded to the Calder Freeway (M79), a divided controlled-access road designed for higher speeds and safety. Ongoing improvements reflect the highway's strategic importance, with projects such as new overtaking lanes between Marong and Bridgewater (in planning as of 2025) to enhance traffic flow for freight and commuter vehicles, and safety upgrades at intersections like Karadoc Avenue in Irymple (completed in 2024). These enhancements address growing demands from regional economic activity and tourism, while bypasses like the deviation (opened 1995) and planned freight corridors around towns such as Marong help mitigate local impacts.

Route Description

Melbourne to Bendigo Section

The Melbourne to Bendigo section of the Calder Highway spans approximately 150 kilometres, serving as a vital link between metropolitan and regional in central Victoria. It begins at the Tullamarine Freeway () interchange in Airport West, where it assumes the designation of Calder Freeway (M79), a high-standard divided freeway designed for efficient urban and interurban travel. This southern portion transitions from dense suburban environments to undulating rural landscapes, accommodating a mix of commuter, freight, and tourist traffic. The route follows freeway standards for much of its length, starting with a 40-kilometre urban section through Melbourne's northwestern suburbs, including Keilor and Sunbury, where it features grade-separated interchanges and noise barriers to mitigate city impacts. Beyond Sunbury, the freeway continues through Gisborne and the Macedon Ranges, incorporating overtaking lanes on uphill sections and bypasses around towns such as Gisborne, Woodend, and to maintain . These upgrades ensure a posted of 110 km/h in rural areas, with the divided carriageway extending to , approximately 110 kilometres from the start. The highway crosses the River three times near , navigating valleys and low hills characteristic of the Macedon Ranges. North of Ravenswood, the alignment shifts to highway standard as Calder Highway (A79), an undivided two-lane road covering the remaining 40 kilometres through Harcourt and Elphinstone to 's southern outskirts. This rural segment includes periodic overtaking lanes but lacks full division, reflecting a transition to lower-traffic regional conditions. For traffic avoiding central , the Calder Alternative Highway (A790) provides a 20-kilometre western bypass from Ravenswood to Marong, traversing farmland and light forest as an undivided rural highway. The entire to stretch thus combines 110 kilometres of freeway with 40 kilometres of highway, facilitating seamless connectivity before the route continues northward toward .

Bendigo to Mildura Section

The Calder Highway continues northward from as State Route A79, passing through the rural localities of Raywood and Marong before reaching Bridgewater, approximately 40 km from . This initial segment traverses undulating farmland in the Loddon Valley, crossing the Loddon River at Bridgewater via a bridge that marks the transition to more open plains. The route then proceeds to Charlton, , and the nearby town of , covering another 100 km through agricultural landscapes dedicated to grain and production. Further north, the highway extends through Sea Lake, Berriwillock, and Ouyen before arriving in Mildura, spanning about 260 km and entering the semi-arid Mallee region characterized by sandy soils, mallee eucalypts, and scattered irrigation channels supporting citrus and grape cultivation near Mildura. The entire Bendigo to Mildura section measures approximately 400 km, predominantly configured as a two-lane undivided highway with intermittent overtaking lanes to accommodate freight and tourist traffic. The highway terminates at the Abbotsford Bridge, a steel lift-span structure crossing the into , where it connects to the Silver City Highway at Curlwaa. This northern endpoint facilitates cross-border travel and trade, linking Victoria's northwest to regional centers in . Along the way, the route crosses the Avoca Plains near Charlton, featuring broad, flat expanses used for before ascending into the drier Mallee scrublands.

Historical Development

Establishment and Naming

The origins of the Calder Highway trace back to the early , when it was proclaimed as a main between 1913 and 1915 under Victoria's Country Roads Act 1912, which established the Country Roads Board (CRB) to oversee rural road development. This proclamation connected to northern regions, including key towns like , Castlemaine, and , addressing the need for improved access to agricultural and mining areas amid growing motor vehicle use. In July 1925, the route was integrated into Victoria's nascent system and designated as the North Western , with the CRB assuming full responsibility for its construction and maintenance; at that time, it spanned approximately 500 km from to , primarily as a or unsealed surface. The highway played a vital role in early 20th-century transport, facilitating the movement of freight such as from the northern wheat belts and remnants of goldfields produce toward 's ports. The road was renamed the Calder Highway in early 1929, in honor of William Calder (1860–1928), the CRB's inaugural chairman and a pioneering who advocated for expanded rural road networks during his tenure from 1913 to 1928. Calder's efforts in promoting systematic road improvements, including surveys and reports on routes like this one, were instrumental in its foundational development. Over time, the highway's numbering evolved from an early designation as F9 within Victoria's state system to the modern A79 (rural sections) and M79 (freeway sections).

Major Construction Phases

During , the Calder Highway received upgrades including sealing and widening to support military logistics, with efforts limited by wartime constraints but focused on handling increased traffic volumes. For instance, in 1940, approximately 8.5 miles (13.7 km) north and south of were sealed, extending the continuous sealed pavement from toward . Further sealing occurred in the late 1940s, such as 2.2 miles (3.5 km) east of with bitumen priming in 1949, reflecting post-war priorities for improved connectivity. These wartime enhancements laid groundwork for broader accessibility, though full completion of key sections extended into the early 1950s. The 1969 Melbourne Transportation Plan proposed converting the entire route from Melbourne to Bendigo into a full freeway as part of an extensive 510 km metropolitan freeway network, aiming to alleviate congestion and support urban growth; this vision influenced subsequent developments but saw only partial implementation due to cost and community opposition. The plan prioritized high-capacity divided roads along the Calder route, setting the stage for freeway-standard sections in the following decade. In the , construction advanced on southern freeway segments, beginning with the 1.9 km Niddrie section opened on April 21, 1972, featuring three lanes each direction from the Tullamarine Freeway to the existing highway. This initial phase marked the shift to modern freeway design near , with extensions reaching Keilor East by 1975 to improve traffic flow and safety amid rising vehicle numbers. These works aligned with broader efforts to widen and realign the route for four-lane standards. Progressive upgrades in the and focused on northern sections, including realignments and pavement strengthening to handle freight and demands. The to segment, previously gravel in parts, achieved full sealing by 1960 but saw additional widening and deviation works through the 1980s, with the 14.6-mile (23.5 km) Ouyen-Nowingi deviation completed in 1954 and further stabilized in later decades. By 1985, these efforts ensured the entire northern route met consistent standards for reliability. Bendigo bypass planning commenced in the 1970s under Country Roads Board initiatives to divert through-traffic from the city center, with partial openings in the 1980s including duplicated carriageways south of . Full standardization of the route to the border, incorporating bypass alignments and improved intersections, was achieved by the , enhancing regional links. The highway's total length evolved from approximately 500 km in 1928 to 560.9 km by 2000, reflecting minor realignments and extensions for efficiency.

Upgrades and Improvements

Freeway Conversions and Duplications

In 2008, the Calder Freeway was widened from the Western Ring Road to Melton Highway, expanding the from two lanes to four lanes in each direction to accommodate growing traffic volumes and improve safety on this key arterial route into Melbourne's northwest. This upgrade enhanced capacity for the section serving commuters and freight between the metropolitan area and regional centers. A major milestone in the freeway conversions occurred in 2009 with the duplication of the 19 km section from Harcourt North to Elphinstone, which opened on 20 April and completed the full four-lane divided highway alignment from to . This $404 million project, jointly funded by state and federal governments, included new bridges, emergency lanes, and grade-separated interchanges at key points such as Elphinstone and Harcourt to eliminate at-grade intersections and reduce collision risks. features incorporated concrete median barriers for head-on crash prevention, noise walls and earthen mounds in semi-urban areas to mitigate acoustic impacts, and multiple wildlife underpasses along with fencing to facilitate safe animal movement across the corridor. The works also featured quieter road surfacing and over 2 million native plants for landscaping to blend the infrastructure with the surrounding environment. Between 2010 and 2015, additional duplications solidified freeway standards along the route, including the full 25 km from Gisborne to with bypass alignments and the Ravenswood to approach, ensuring continuous divided carriageways and improved freight efficiency. In the area, a 10 km section was converted to full freeway standard by 2012, incorporating grade-separated interchanges at major junctions like the Ravenswood interchange to handle higher regional traffic flows. These enhancements consistently applied barriers for separation, attenuation measures in populated zones, and wildlife crossings to minimize ecological disruption across the upgraded network.

Recent and Proposed Projects

In recent years, the Calder Highway has seen targeted upgrades aimed at enhancing safety and connectivity, building on prior duplications. A key project completed in 2018 was the Ravenswood Interchange, a $86.9 million grade-separated junction at the with the M79 Calder Alternative Highway, south of . This upgrade replaced a hazardous at-grade , significantly improving access to and reducing crash risks for motorists and freight traffic. Further safety improvements in rural sections have advanced through planning in 2024–2025, with proposed between Marong and Bridgewater, spanning approximately 10 km. These northbound and southbound , funded in part by $8 million from the federal government, address overtaking constraints on undivided sections, enhancing and reducing head-on collision risks in this freight-heavy corridor. Construction is expected to commence in mid-2026, with completion by mid-2027. Near Melbourne, the Calder Park Drive interchange project received $300 million in federal funding as part of the 2025-26 budget, enabling the construction of a new on the Calder Freeway near Sunbury. This initiative complements the , which eliminated the Calder Park Drive rail crossing in July 2025—ahead of schedule—along with crossings at Old Calder Highway and Watsons Road in Diggers Rest, via new road bridges over the . These removals, the 87th statewide under Victoria's broader program to eliminate 110 metropolitan crossings by 2030, have improved rail reliability and road safety by alleviating congestion and boom gate delays. Looking ahead, a scoping study for the Melbourne to Mildura corridor, initiated in early 2022 and ongoing as of November 2025, is evaluating future duplications and upgrades along the to boost freight efficiency. This preconstruction work, expected to complete in mid-2026, identifies priority sections for widening and intersection improvements, supporting increased heavy vehicle traffic to regional centers like while prioritizing safety and environmental considerations.

Key Locations

Major Towns and Landmarks

Bendigo serves as a central hub along the Calder Highway, with a of 125,805 residents as of 2024, making it one of regional Victoria's largest cities. Founded during the , the city retains significant historical ties to mining heritage, including preserved sites like the Bendigo Goldfields that attract tourists and underscore its cultural importance. The highway intersects with the Midland Highway here, enhancing Bendigo's role as a key node for freight movement and regional connectivity, while its economy thrives on tourism, education, and manufacturing. Midway between Melbourne and Bendigo, the towns of and Gisborne provide essential services and historic charm to highway travelers. , with 7,513 residents as of the 2021 Census, features well-preserved bluestone architecture and pavements dating to the , reflecting its origins as a stop on early routes. Gisborne, home to 14,216 people as of the 2021 Census, maintains a semi-rural character with open spaces and heritage buildings, serving as a gateway to surrounding farmlands and supporting local through markets and services. Both towns offer access to natural attractions, including the nearby Hanging Rock Reserve, a volcanic landmark in Macedon Regional Park known for its dramatic formations and cultural significance in and film. Further north, rural service centers like Charlton and cater to agricultural communities along the . Charlton, with a population of 1,095 in , functions as a hub for and in the Buloke Shire, bolstered by its proximity to Lake Buloke, a significant landmark that supports and seasonal migrations. , recording 1,015 residents in , similarly focuses on grain production and , providing refueling and supply stops for users amid the expansive Mallee region's farmlands. These towns highlight the highway's integration with Victoria's agricultural economy, facilitating the transport of crops like that contribute substantially to the state's output. At its northern terminus, Mildura anchors the Calder Highway with a population of approximately 57,626 in the Rural City of Mildura as of 2024, serving as the economic heart of the Sunraysia region. Renowned for its citrus industry, the town produces a major share of Australia's oranges, grapes, and other fruits, with orchards lining the Murray River floodplain and supporting export-oriented agribusiness. Mildura connects travelers to Murray River tourism, including the historic Abbotsford Bridge, a steel truss lift-span structure built in 1928 that spans the river and links to New South Wales, offering scenic views and heritage value. Overall, the Calder Highway enhances regional connectivity by linking these towns and landmarks, while playing a vital in freight , particularly for agricultural goods such as , which forms a of northern Victoria's . Near Woodend, a local wildlife shelter provides rehabilitation for like wallabies and koalas, emphasizing conservation efforts amid highway-adjacent habitats.

Significant Intersections and Junctions

The Calder Highway's southern terminus is at the grade-separated interchange with the Tullamarine Freeway () in Airport West, Melbourne, serving as a primary gateway for northbound traffic from the city's northwestern suburbs and precinct. This junction facilitates seamless connectivity for freight and passenger vehicles heading toward regional Victoria. Further north, the highway connects with the Western Ring Road (M80) via another grade-separated interchange near Keilor Park, a high-volume node that supports orbital movement around Melbourne's west and integrates with the broader metropolitan freeway network. This manages substantial freight flows, with the M80 projected to carry over 250,000 vehicles daily by 2031. In the mid-route section near Gisborne, the Sunbury Road interchange provides essential access to surrounding rural communities and has undergone upgrades to enhance capacity and safety, including improved ramp configurations as part of broader connectivity planning. Around , key at-grade intersections occur with the McIvor Highway (B280) to the east and the Midland Highway (A300) to the south, supporting regional links to Heathcote and Castlemaine; south of the city at , a 2018 grade-separated interchange with the Calder Alternative Highway improves by eliminating conflicts for through-traffic. Toward the northern end near , the highway intersects the Mallee Highway (B12), enabling east-west travel across the Mallee region toward and . In , the northern terminus features an at-grade junction with the (A20), providing critical connectivity to westward and the eastward via . Rural junctions along the route, such as those near Bridgewater, incorporate overtaking lanes to manage traffic volumes with a significant proportion of heavy vehicles, prioritizing . Safety enhancements at select junctions include roundabouts near to reduce collision risks at lower-speed rural crossings, and signalized intersections in , such as at Main Road (C793), which control access for local traffic while maintaining efficiency. Between Marong and Bridgewater, overtaking provisions address segments with a significant proportion of heavy vehicles.

References

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