19th century

The early beginning of the Mernda line opened on 8 October 1889, as part of railway extensions into the northern suburbs. What became known as the Inner Circle line was opened from Spencer Street station (now Southern Cross station) via Royal Park station, to a station called Collingwood (now called Victoria Park), and then on to Heidelberg.^[9] The Epping line branched off at Fitzroy North to Preston-Reservoir station (later renamed Reservoir) in 1889, with the line extended to Whittlesea a few months later, on 23 December.^[10]

20th century

A steam train departing Northcote station on an up service to Whittlesea, 1912.

Trains on the line operated via Fitzroy and the Inner Circle, until the opening of the current connection between Victoria Park and Princes Bridge stations in 1901. Passenger services were operated in two tiers: a local train to Preston-Reservoir station via Clifton Hill, and a country-bound mixed train to Whittlesea, via Fitzroy.^[11] The Epping line was electrified to Reservoir in 1921, with an AEC railmotor providing a shuttle service between Reservoir and the terminus at Whittlesea. Preston-Reservoir station was renamed Reservoir in 1909.^[12][13]

The line had a number of Rail Motor Stopping Places along the line, these being a mere nameboard beside the railway line at a public access point. The first were RMSP 8, 9, and 10, which opened on 10 May 1927; followed by Epping Quarries Siding RMSP in January 1928; RMSP 17 in March 1928; RMSP 26 in January 1930; RMSP 33 in July 1932; RMSP 39 in July 1941; and RMSP 77 in October 1949, which was renamed Lalor station in 1952.^[11] Direct trains to Whittlesea from Flinders and Spencer streets were withdrawn from 1948.^[14]

Electrification was extended along 4.4 kilometres (2.7 mi) of single track to Thomastown in 1929, paid for by a land developer, who paid for the works, as well as guaranteeing against operating losses.^[11] Keon Park station was opened at the same time, but the Whittlesea shuttle train continued to connect with suburban trains at Reservoir, until 1931. Goods trains to Whittlesea were withdrawn in 1955, and goods trains from Epping ended in 1958.^[14]

Electric suburban services were extended to Lalor station in November 1959, in addition to the duplication of the line from Reservoir to Keon Park, services beyond this point (to Whittlesea) were replaced by a bus service, subsequently closing the remaining section of the line.^[15][16][17] The line to Epping itself was reopened and electrified in 1964, with the remaining line dismantled in the 1970s.^[14] However, the right-of-way beyond Epping was retained to allow future expansion of the rail corridor.^[18]

21st century

South Morang extension

Epping station was rebuilt as part of the project.

South Morang station opened on 2 April 2012.

Proposals for the duplication of the line between Keon Park and Epping have dated as far back as 1974.^[19] In 1983, Whittlesea Council made a submission to the Victorian Government supporting the duplication of the line.^[20] Following the election of the Bracks Government in 1999, a promise was made to restore the service to South Morang, along the former right-of-way by 2003.^[21] In 2003, a Trainlink bus service was introduced from Epping to South Morang, meeting every train, but the 2005 Meeting Our Transport Challenges plan postponed construction of the railway until 2021.^[21] The restoration of the railway to Mernda was also identified in the Strategic Transportation Study, undertaken by the City of Whittlesea in 2002. In the 2008 State Budget, $10 million was earmarked for planning work on the four-kilometre extension, in addition, to design work for the duplication between Keon Park and Epping stations.^[21]

On 1 May 2009, the State Government announced that they had committed $562.3 million in the 2009 State Budget for the extension of the line to South Morang, covering capital and construction works. Construction would begin the following year in 2010 and was to be completed by 2013.^[6][22] Major construction commenced in October 2010, with works including:^[6][23]

• The duplication of the 5 km (3.1 mi) of existing single track between Keon Park and Epping
• The construction of 3.5 kilometres (2.2 mi) of new double track from Epping to South Morang
• A rebuilt South Morang station with a bus interchange, 450 car parking spaces, and 29 protected bike spaces
• A rebuilt Thomastown station with a second platform and a pedestrian overpass
• Newly built Epping station
• The upgrade and expansion of the Epping train maintenance facility
• The construction of a new shared use path between Epping and South Morang

The double track between Keon Park and Epping was commissioned on 28 November 2011. A shared use path was opened to the public on 5 February 2012. The three-metre wide path runs the length of the rail extension and provides connections between the existing bicycle network, through to South Morang station. Finally, the extension to South Morang opened on 2 April 2012. No level crossings were built on the new section of the track, with road overpasses provided at Cooper Street, Pindari Avenue, and Civic Drive.^[6]

Mernda extension

The space underneath the rail corridor on the Mernda extension features public open space like playground equipment.

Proposals for an extension to Mernda have dated as far back as 1974.^[19] In 1983, Whittlesea Council made a submission to the Victorian Government to extend the Epping line to South Morang and Mernda.^[20] After many years of extensive community activism, the Andrews government announced in the 2015 State Budget that $9 million was to be allocated to plan the 8-kilometre (5 mi) extension of the line to Mernda, with construction commencing in 2016. The announcement included:^[7]

• The 8-kilometre (5 mi) line to be fully double tracked
• Completely grade separated through a combination of rail bridges and underpasses, with more than 86% of the rail line being built at ground level
• The construction of two new stations (Mernda and Middle Gorge) with an option for an additional one (Hawkstowe) (all three were constructed)^[24]
  • All three stations included bike and car parking as well as bus interchanges
• A new shared use path, connecting to the one constructed at South Morang as part of the South Morang rail extension

Construction began in 2016, with the stations opening six months early on 26 August 2018.^[1][25] Prior to the lines official opening, a community open day was held to promote the new stations to the local residents.^[26]

Level Crossing Removals

The rebuilt platforms at Reservoir station in February 2020. The station was rebuilt to remove the crossing at High Street, Reservoir.

The Level Crossing Removal Project has announced the removal of 6 level crossings on the line, to be completed in stages from 2019 to 2025. In 2019, one level crossing was removed at High Street, Reservoir. The crossing was removed by raising the rail line onto a rail bridge above the road, with the adjacent Reservoir station also being elevated.^[27] A skyrail from Bell to Preston stations was constructed in 2022 to remove 4 level crossings. Crossings were removed at Bell Street, Cramer Street, Murray Road, and Oakover Road, with both Bell and Preston stations rebuilt as part of these removals.^{[28][29][30][31]} The final crossing removal to occur will be the one at Keon Parade in 2024. This removal will involve the construction of a rail bridge and a newly elevated Keon Park station.^[32] At the end of these works, the Mernda line will have 12 remaining crossings on the corridor that are not proposed for removal.^[33]

Melbourne Metro 2

The indicative alignment of the Melbourne Metro 2.

The 2012 Network Development Plan identified the need for a east-west tunnel connecting the Mernda line to the Werribee (and potentially) the Geelong line.^[34] The project would split the Mernda line from the Hurstbridge line after Clifton Hill into a new tunnel, travelling east stopping at a new station in the "inner north", before connecting with at Parkville, Flagstaff, and Southern Cross stations.^[35] Exiting the CBD, the line would continue in a tunnel stopping at a new station in the suburb of Fishermans Bend, before crossing underneath the Yarra River and arriving at Newport station.^[35] The line would then exit the tunnel and travel further west to connect with the Werribee line bypassing the Altona Loop.^[35] The Werribee and Williamstown lines will be reconfigured to provide better and simpler service.^[35][36] This project was initially meant to be completed in the 2020s, however, no funding or planning has taken place, with the revised Victorian Rail Plan stating that the project would be completed under Stage 6 of the plan.^[37]

Wollert extension

Highlighted in the 2018 Victorian Rail Plan, a proposal exists for a spur line to be constructed to the suburb of Wollert, at a cost of up to $300 million.^[38] The line would branch off the Mernda line after Lalor station, with new stations at the Pacific Epping shopping centre, and the suburbs of Epping, Aurora and Wollert.^[39][37] In addition to the new stations, the corridor would be fully grade separated from opening, with the line featuring two tracks, and modern, fully wheelchair accessible stations. In 2017, the State Government announced the acquisition of 6 properties valued at $3.8 million for a future rail corridor.^[40] The $3.8 million was sourced from a 'statewide developers' contribution fund. Since the 2017 acquisitions, there has been little planning developments, with only a small amount of attention given by the local residents, council, and some political parties.^[41]

Services

Services on the Mernda line operate from approximately 5:00 am to around 12:00 daily.^[42] In general, during peak hours, train frequency is 7–10 minutes in the AM peak on the Mernda line while during non-peak hours the frequency is reduced to 20–30 minutes throughout the entire route.^[4] Frequencies are doubled between Flinders Street and Clifton Hill in conjunction with the Hurstbridge line. On Friday nights and weekends, services run 24 hours a day, with 60-minute frequencies available outside of normal operating hours.^[43]

Train services on the Mernda line are also subjected to maintenance and renewal works, usually on selected Fridays and Saturdays. Shuttle bus services are provided throughout the duration of work for affected commuters.^[44]

Operators

The Mernda line has had a total of 6 operators since its opening in 1888. The majority of operations throughout its history have been government-run: from its first service in 1888 until the 1999 privatisation of Melbourne's rail network, four different government operators have run the line.^[46] These operators, Victorian Railways, the Metropolitan Transit Authority, the Public Transport Corporation and Hillside Trains have a combined operational length of 111 years. Hillside Trains was privatised in August 1999 and later rebranded Connex Melbourne. Metro Trains Melbourne, the current private operator, then took over the operations in 2009. Both private operators have had a combined operational period of 24 years.^[47]

Route

Mernda line
km Multiple lines via North Melbourne City Loop 1.2 Southern Cross ●●●●●●● 2.5 Flagstaff ●●● 3.1 Melbourne Central 4.3 Parliament ●●●●●●● 0.0 Flinders Street ●●●●●●●●●● 0.1 Princes Bridge (closed) Multiple lines via Richmond City Loop 1.7 Jolimont ■■ 2.0 Jolimont Tunnel 2.2 West Richmond Tunnel 2.4 West Richmond 2.9 North Richmond ■■ 3.0 Victoria Street 3.6 Collingwood 4.1 Johnston Street 4.2 Victoria Park 4.5 Eastern Freeway 5.4 Clifton Hill ● 5.6 Heidelberg Road Hurstbridge line to Hurstbridge 5.8 High Street 6.1 Rushall Inner Circle line to Royal Park (dismantled) 6.4 Merri Creek 6.6 Merri Parade 6.8 Merri ■■ 7.7 Northcote ■■ 8.4 Croxton ■■ 9.4 Thornbury ■■ Miller Street (tram only) 10.5 Bell 10.5 Bell Street 11.2 Preston 12.4 Regent 13.7 Reservoir 13.9 High Street 14.7 Ruthven 16.2 Keon Parade (Removing by 2025) 16.3 Keon Park 17.3 Western Ring Road 17.9 Thomastown ~18.9 RMSP 8 (2nd) (demolished) 19.6 Lalor ~20.5 RMSP 8 (1st) (demolished) 21.6 Epping 21.9 Darebin Creek 24.7 South Morang 24.9 McDonalds Road ~24.9 RMSP 39 (demolished) 26.7 Middle Gorge 27.9 Plenty Road ~28.2 RMSP 33 (demolished) 29.5 Hawkstowe ~30.5 RMSP 9 (demolished) 30.7 Mernda 32.0 Bridge Inn Road 32.9 end of Metro area Whittlesea line to Whittlesea (dismantled) km

The Mernda line forms a relatively linear route from the Melbourne central business district to its terminus in Mernda. The route is 33.1 kilometres (20.6 mi) long and is fully doubled tracked from Flinders Street to its termnius. The only underground section of the Mernda line is in the City Loop, where the service stops at 3 underground stations.^[48] Exiting the city, the Mernda line traverses mainly flat country with few curves and fairly minimal earthworks for most of the line. Despite the otherwise fairly straight line, it does include Melbourne's sharpest railway curve, between Rushall and Merri. This curve originally made up the third side of a triangular junction, connecting the two original branches from the now-closed North Fitzroy station.^[49] Only this third leg of the triangle remains. Some sections of the line has been elevated or lowered into a cutting to eliminate level crossings.^[50] Despite some removals, there are a number of level crossings still present with no current plans to remove them.

The line follows the same alignment as the Hurstbridge line with the two services splitting onto different routes at Clifton Hill. The Mernda line continues on its northern alignment, whereas the Hurstbridge line takes a north-eastern alignment towards its final destination of Hurstbridge station.^[51] Most of the rail line goes through built-up suburbs and some industrial areas, but after Middle Gorge, the line gets into more sporadic suburbs and park lands.^[51] This outer portion of the line is one of Melbourne's main growth corridors, which is rapidly replacing farmland with housing and commercial developments causing a rise in patronage.^[52]

Stations

The line serves 29 stations across 33.1 kilometres (20.6 mi) of track. The stations are a mix of elevated, lowered, underground, and ground-level designs. Underground stations are present only in the City Loop, with the majority of elevated and lowered stations being constructed as part of level crossing removals or line extension projects.^[53] From 2025, Keon Park station will be elevated as part of level crossing removal works.^[32]

Station	Accessibility	Opened	Terrain	Train connections	Other connections
Flinders Street	Yes—step free access[54]	1854[55]	Lowered	16 connections  Alamein line   Belgrave line   Craigieburn line   Cranbourne line   Flemington Racecourse line   Frankston line   Gippsland line   Glen Waverley line   Hurstbridge line   Lilydale line   Pakenham line   Sandringham line   Sunbury line   Upfield line   Werribee line   Williamstown line
Southern Cross		1859[55]	Ground level	27 connections  Alamein line   Albury line   Ararat line   Ballarat line   Belgrave line   Bendigo line   Craigieburn line   Cranbourne line   Echuca line   Flemington Racecourse line   Geelong line   Gippsland line   Glen Waverley line   Hurstbridge line   Lilydale line   Maryborough line   NSW TrainLink Southern   Pakenham line   Seymour line   Shepparton line   Sunbury line   Swan Hill line   The Overland   Upfield line   Warrnambool line   Werribee line   Williamstown line
Flagstaff		1985[55]	Underground	10 connections  Alamein line   Belgrave line   Craigieburn line   Cranbourne line   Glen Waverley line   Hurstbridge line   Lilydale line   Pakenham line   Sunbury line   Upfield line
Melbourne Central		1981[55]
Parliament		1983[55]
Jolimont		1901[55]	Lowered	1 connection  Hurstbridge line
West Richmond			Ground level
North Richmond	No—steep ramp[54]		Elevated
Collingwood
Victoria Park		1888[55]
Clifton Hill			Ground level
Rushall		1927[55]
Merri	Yes—step free access[54]	1889[55]
Northcote
Croxton	No—steep ramp[54]
Thornbury	Yes—step free access[54]
Bell			Elevated
Preston
Regent	No—steep ramp[54]		Ground level
Reservoir	Yes—step free access[54]		Elevated
Ruthven	No—steep ramp[54]	1963[55]	Ground level
Keon Park	Yes—step free access[54]	1929[55]
Thomastown		1889[55]
Lalor		1949[55]
Epping	Yes—step free access[56][lower-alpha 1]	1889[55]	Lowered
South Morang	Yes—step free access[54]	2012[55]
Middle Gorge		2018[55]	Ground level
Hawkstowe			Elevated
Mernda

Rolling stock

A X'Trapolis train departing Bell station in 2023.

The Mernda line uses X'Trapolis 100 electric multiple unit (EMU) trains operating in a two three-car configuration, with three doors per side on each carriage, and can accommodate up to 432 seated passengers in each six-car configuration.^[58] The trains were originally built between 2002 and 2004 as well as between 2009 and 2020 with a total of 212 three-car sets constructed. The trains are shared with 7 other metropolitan train lines and have been in service since 2003.^[58]

Alongside the passenger trains, Mernda line tracks and equipment are maintained by a fleet of engineering trains. The four types of engineering trains are: the shunting train; designed for moving trains along non-electrified corridors and for transporting other maintenance locomotives, for track evaluation; designed for evaluating track and its condition, the overhead inspection train; designed for overhead wiring inspection, and the infrastructure evaluation carriage designed for general infrastructure evaluation.^[59] Most of these trains are repurposed locomotives previously used by V/Line, Metro Trains, and the Southern Shorthaul Railroad.^[59]

Accessibility

The recently rebuilt Bell station has assisted in making the line more wheelchair accessible

In compliance with the Disability Discrimination Act of 1992, all stations that are new-built or rebuilt are fully accessible and comply with these guidelines.^[60] Just over half of the stations on the corridor are fully accessible, however, some stations haven't been upgraded to meet these guidelines.^[61] These stations do feature ramps, however, they have a gradient greater than 1 in 14.^[61] Stations that are fully accessible feature ramps that have a gradient less than 1 in 14, have at-grade paths, or feature lifts.^[61] These stations typically also feature tactile boarding indicators, independent boarding ramps, wheelchair accessible myki barriers, hearing loops, and widened paths.^[61][62]

Projects improving station accessibility have included the Level Crossing Removal Project, which involves station rebuilds and upgrades, and individual station upgrade projects.^[63][64] These works have made significant strides in improving network accessibility, with more than 67% of Mernda line stations classed as fully accessible. Future station upgrade projects will continue to increase the number of fully accessible stations overtime.

Signalling

The Mernda line uses three-position signalling which is widely used across the Melbourne train network.^[65] Three-position signalling was first introduced on the line in 1921, with the final section of the line converted to the new type of signalling during the extension of the line to Mernda in 2018.^[1]