The O-Train is a
light rail
Light rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology National Conference of the Transportation Research Board while also having some features from ...
system in
Ottawa
Ottawa is the capital city of Canada. It is located in the southern Ontario, southern portion of the province of Ontario, at the confluence of the Ottawa River and the Rideau River. Ottawa borders Gatineau, Gatineau, Quebec, and forms the cor ...
, Ontario, Canada, operated by
OC Transpo
OC Transpo is the primary Transit district, public transport agency for the city of Ottawa, Ontario, Canada, operating bus rapid transit, light rail, conventional transit bus, bus routes, and door-to-door paratransit in the nation's capital regi ...
. The O-Train system consists of three lines, all of which are fully
grade-separated
In civil engineering (more specifically highway engineering), grade separation is a method of aligning a junction of two or more surface transport axes at different heights ( grades) so that they will not disrupt the traffic flow on other tr ...
. As of March 2025, one line is currently being extended and a new line will be added as part of the Stage 2 project, with new segments being phased in between 2025 and 2027.
The O-Train network currently operates one
electric
Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwel ...
light rail line,
Line 1, and two
diesel light rail lines,
Line 2 and
Line 4. Line 1 travels in a 2.8 km tunnel in the downtown core, and the rest of the network continues to operate grade-separated on surface-level, trenched, or elevated tracks.
Line 1 is being extended in both directions, with the eastward extension to
Trim station in Orleans scheduled to open first in 2025. By 2027, the westward expansion of Line 1 to
Algonquin station and the construction of new
Line 3 to
Moodie station in the west end are expected to be completed. These expansions will bring the system's total length to 64.5 km (40.1 mi), with four lines and 41 stations.
Overview
There are 3 operating O-Train lines:
* Line 1 is an electric light rail line running east–west from to . It connects to
Transitway services at each terminus and with Line 2 at . With the exception of the 2.8km downtown tunnel portion which includes three underground stations, the rest of alignment currently follows former Transitway bus rapid transit infrastructure.
is the only underground station outside the downtown tunnel.
* Line 2 is a partially single-tracked, diesel light rail line that runs north to south from to , running alongside the southeast Transitway for part of its journey. Trains utilize sidings, as well as the two double-tracked sections in the northernmost and southernmost ends to pass each other. The line had closed May 2020 for numerous upgrades as part of the Stage 2 project, and reopened January 6, 2025.
* Line 4 is a single tracked diesel light rail line with a single passing siding at . The line runs west to east from to where it connects to Line 2.
History
Pilot project
The "O-Train" (now Line 2) was introduced in 2001 as a pilot project to provide an alternative to the
busways on which Ottawa had long depended exclusively for its high-grade transit service.. The original north-south 8km (5mi) single tracked line had cost $21 million to construct and purchase 3
low floor
Low or LOW or lows, may refer to:
People
* Low (surname) Low is an English language, English and Languages of Scotland, Scottish surname. It is also a common surname found among Overseas Chinese language, Chinese communities around the world. ...
Bombardier Talent
The Talent is a multiple unit light train manufactured by Bombardier that was developed by Waggonfabrik Talbot in Aachen shortly before the company was acquired by Bombardier in 1995. The name ''Talent'' is an acronym in German for ''TALbot L ...
diesel multiple unit trains, and $8 million to operate for 2 years. It's relatively little cost stemmed from simple station construction, and the reuse of a
Canadian Pacific Railway
The Canadian Pacific Railway () , also known simply as CPR or Canadian Pacific and formerly as CP Rail (1968–1996), is a Canadian Class I railway incorporated in 1881. The railway is owned by Canadian Pacific Kansas City, Canadian Pacific Ka ...
freight railway. It is often described as "light rail", partly because there were plans to extend it into Ottawa's downtown as a tramway-like service, and partly because the original trains are smaller and lighter than most mainline trains in North America and do not meet the
Association of American Railroads' standards for
crash strength.
Name
The system's name was proposed by Acart Communications, an Ottawa advertising agency. The name "O-Train" was based on the classic
Duke Ellington
Edward Kennedy "Duke" Ellington (April 29, 1899 – May 24, 1974) was an American Jazz piano, jazz pianist, composer, and leader of his eponymous Big band, jazz orchestra from 1924 through the rest of his life.
Born and raised in Washington, D ...
signature tune "
Take the 'A' Train", which refers to the
New York City Subway's A train. Because Ottawa is a bilingual city, the name had to work in both English and French. It survived an internal OC Transpo naming competition and was adopted soon after.
From its inception until 2014, the term "O-Train" initially referred to the north–south diesel line. With the construction of a second line, the east/west Confederation Line, the O-Train branding was extended to include both rail transit services, with the original service being renamed as the Trillium Line.
Early extension plans
On July 12, 2006, Ottawa City Council voted by a vote of 14 to 7, with 1 councillor absent, to award the north–south expansion to the Siemens/PCL/Dufferin design team. The proposed extension, which was not undertaken, would have replaced the Trillium Line with an electric LRT system running on double track, as opposed to the current single-track diesel system.
According to the plan, the line was to be extended east from its current northern terminus to run through LeBreton Flats and downtown Ottawa as far as the University of Ottawa, and south-west from its
Greenboro terminus to the growing
Riverside South community and
Barrhaven. Much of the route would have run through the undeveloped Riverside South area to allow a large new suburb to be constructed in the area south of the airport. The line would not have connected to the airport. Construction of the extension was scheduled to begin in the autumn of 2006, resulting in the shutdown of operations in May 2007, and to have been completed in autumn 2009 with operations resuming under the new systems and rolling stock.
The diesel-powered Talents would have been replaced with electric
tram
A tram (also known as a streetcar or trolley in Canada and the United States) is an urban rail transit in which Rolling stock, vehicles, whether individual railcars or multiple-unit trains, run on tramway tracks on urban public streets; some ...
s more suitable for on-street operation in the downtown area, specifically the
Siemens S70 Avanto (due to the "design, build, and maintain" contracting process which has focused upon the bid proposing this vehicle). Other bids had proposed the
Bombardier Flexity Swift and a
Kinki Sharyo
is a Japanese manufacturer of railroad vehicles based in Osaka. It is an affiliate company of Kintetsu Corporation. In business since 1920 as Tanaka Rolling Stock Works, and renamed The Kinki Sharyo Co., Ltd in 1945, they produce rolling stock f ...
tram.

With the use of electric power, greater frequency, and street-level running in central Ottawa, the expanded system would have borne much more resemblance to the urban tramways usually referred to by the phrase "light rail" than does the pilot project (though the use of the
Capital Railway track and additional existing tracks which have been acquired along its route may cause it to remain a mainline railway for legal purposes).
The estimated cost of the north–south expansion would have been just under
$780 million (not including the proposed maintenance facility), making the project the largest in the city's history since the
Rideau Canal
The Rideau Canal is a 202-kilometre long canal that links the Ottawa River at Ottawa with the Cataraqui River and Lake Ontario at Kingston, Ontario, Canada. Its 46 Lock (water navigation), locks raise boats from the Ottawa River 83 metres (272 ...
project. The federal and provincial governments had each promised $200 million for the expansion, with the city contributing the remainder of the cost using funds from various sources including the provincial gasoline tax, the city's transit reserve fund, and the Provincial Transportation Infrastructure Grant. 4.5% of the total project cost was expected to come from the property tax base. The city also requested studies on an extension of the railway from the proposed
University of Ottawa
The University of Ottawa (), often referred to as uOttawa or U of O, is a Official bilingualism in Canada, bilingual public research university in Ottawa, Ontario, Canada. The main campus is located on directly to the northeast of Downtown Ot ...
terminus through to
Hurdman station.
Expansion controversies
The north–south expansion planning process became a source of great controversy. It was a major issue in the
2006 municipal election. The incumbent mayor
Bob Chiarelli had long been the main advocate for light rail in Ottawa. Terry Kilrea, who finished second to Chiarelli in the 2003 municipal election and briefly ran for mayor in 2006, believed the plan was vastly too expensive and would also be a safety hazard for Ottawa drivers. He called for the entire light rail project to be scrapped. Mayoral candidate
Alex Munter supported light rail but argued that the plan would do little to meet Ottawa's transit needs and that the true final expense of the project had been kept secret. He wanted to cut the
Barrhaven leg and start work on an east–west line.
Larry O'Brien, a businessman who entered the race late, wanted to postpone the project for six months before making a final decision.
Transport 2000 president David Jeanes, a longtime supporter of light rail in Ottawa and a member of the city's transportation advisory committee, stated that he believed that the project was being "designed to fail". City transportation staff, though long in favour of bus rapid transit systems, disagreed with Jeanes's assessment.
Numerous alternatives were proposed, including Alex Munter's plan, the "Practical Plan" by the Friends of the O-Train, and the Ottawa Transit group plan.
Cancellation of expansion

On December 1, 2006, the new council took office. It started a debate on the issue during the week of December 4 with three options including the ''status quo'', the truncation of portions of the current track or the cancellation of the contract. An ''
Ottawa Sun
The ''Ottawa Sun'' is a daily newspaper in Ottawa, Ontario, Canada. It is published by Sun Media. It began publication in 1983 as the ''Ottawa Sunday Herald'', until it was acquired by (then) Toronto Sun Publishing Corporation in 1988. In April 2 ...
'' article had reported on December 5 that if the project were cancelled, there could be lawsuits by Siemens against the city totalling as much as $1 billion.
The new mayor,
Larry O'Brien, opted to keep the extension to Barrhaven while eliminating the portion that would run from
Lebreton Flats to the
University of Ottawa
The University of Ottawa (), often referred to as uOttawa or U of O, is a Official bilingualism in Canada, bilingual public research university in Ottawa, Ontario, Canada. The main campus is located on directly to the northeast of Downtown Ot ...
. However, Council also introduced the possibility of building several tunnels in the downtown core in replacement of rail lines on Albert and Slater. Total costs for the tunnels would have been, according to city staff, about $500 million. The council voted by a margin of 12–11 in favour of continuing the project, but without the downtown section. An environmental assessment was to be conducted on the possibility of building a tunnel through downtown. Another attempt made by Councillor
Gord Hunter to review the project later failed. At the same time, the
Ontario
Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...
government was also reviewing the project before securing its $200 million funding. However, it was reported that both the federal and provincial funding totalling $400 million was not secured before the contract deadline of December 15. O'Brien withdrew his support, and a new vote was held on December 14. With the presence of
Rainer Bloess, who was absent during the previous vote, the council decided to cancel the project by a margin of 13-11 despite the possibility of lawsuits from Siemens, the contract holder. It was reported on February 7, 2007, that the cost of the cancelled project was about $73 million.
On February 14, 2007, it was reported that Siemens had written a letter to the city and gave two options. The first proposal was for the city to pay $175 million in compensation to Siemens in order to settle the dispute and cancel the contract. The second proposal was to re-launch the project with an additional price tag of $70 million to the cost of the original project. Councillor
Diane Deans had tabled a motion for a debate on February 23, 2007, but it was later cancelled. A poll conducted by the mayor's office showed that a majority of south-end residents disagreed with the cancellation of the project but only a third wanted to revive it. In 2008, lawsuits against the city of Ottawa over its cancelled light rail system totalled $36.7 million.
East–west line
The city also committed funds to perform an environmental assessment for an east–west route, running between Kanata and Orleans mainly via an existing railway right-of-way bypassing downtown. Planners initially explored the possibility of using the system's three Talents for an east–west pilot project after they were to be replaced by electric trams on the north–south line. Due to the cancellation of the north–south electrification project, any further plans for the diesel-powered trains on that route are uncertain. It was once thought that
Transport Canada
Transport Canada () is the Ministry (government department), department within the Government of Canada responsible for developing regulations, Policy, policies and Public services, services of road, rail, marine and air Transport in Canada, tra ...
might not approve its use on the existing tracks for an east–west system, since they would have to be shared with other mainline trains. The city opted to do the westward expansion in stages, beginning with the east–west LRT Confederation Line.
Other possibilities

Long-term plans had included lines on Carling Avenue from the existing
Dow's Lake station westward to Bayshore and
Bells Corners, and from the
Rideau Centre south-east to the area of
Innes Road and Blair Road via Rideau Street,
Montreal Road
Montreal Road (French: ''Chemin de Montréal''), also known as List of numbered routes in Ottawa, Ottawa Road #34, is a major east-west Ottawa road that links Lower Town, Lowertown to Vanier, Ontario, Vanier and the farther eastern neighbourhoo ...
, and Blair Road. The city has conducted a $4 million environmental assessment study for these two corridors. There were also possibilities of a rail link to
Hurdman station.
Service to
Gatineau
Gatineau ( ; ) is a city in southwestern Quebec, Canada. It is located on the northern bank of the Ottawa River, directly across from Ottawa, Ontario. Gatineau is the largest city in the Outaouais administrative region of Quebec and is also p ...
would also be possible to serve commuters, as there is
a railway bridge over the
Ottawa River
The Ottawa River (, ) is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word "to trade", as it was the major trade route of Eastern Canada at the time. For most of its length, it defines the border betw ...
nearby, but the government of Gatineau was until 2016 opposed to extending the Trillium Line into its territory; Ottawa's city staff have taken steps to isolate the north–south line from the bridge, so it would need to be re-built north of
Bayview station. A line running into Gatineau was not included in the plans for expansion up to 2021.
Mayor's Committee on Transportation
In January 2007, Mayor Larry O'Brien formed a special committee to review the city's transportation needs and provide a report to city council by the beginning of June 2007. On June 1, this report was presented to the mayor, and was subsequently released to the media and the public on June 6. This report was criticized by some for planning service to Smiths Falls and Arnprior while neglecting to plan service to Rockland and Embrun which were, at the time, rapidly growing communities east of Ottawa.
The committee, headed by the former member of parliament and cabinet minister
David Collenette, recommended that Ottawa's needs would be best served by light rail through the future. This plan called for expansion of the system using rail rights-of-way and stations (
Via Rail
Via Rail Canada Inc. (), operating as Via Rail or Via (stylized as VIA Rail), is a Canadian Crown corporation that operates intercity passenger rail service in Canada.
As of December 2023, Via Rail operates 406 trains per week across eight ...
, CP Rail, and Ottawa Central Railway), constructing new stations and a tunnel through the downtown core, going through the former Union Station (now the
Government of Canada Conference Centre). The plan called for using bi-mode diesel-electric trains or multiple units, allowing rapid expansion on current track powered by diesel engines, while switching to electric power through the tunnel downtown to remove the concerns about underground exhaust. Through the next thirty years, the plan called for expansion of up to six lines, including links to surrounding municipalities, the city of Gatineau and MacDonald-Cartier International Airport, with the lines gradually being electrified and expanded as required.
Only the initial portion of the project was budgeted, and using only rough numbers, but the committee felt that this could be completed for between $600 million to $900 million, including the downtown tunnel portion, within the following 5–10 years.
New transit plan
On November 28, 2007, the city council announced the expansion of rail service to Riverside South, as well as a downtown tunnel, with an environmental assessment study to determine whether it should be used by bus or rail service. Options were also open for additional extensions to Cumberland South to the east and south of
Lincoln Fields Station at the
Queensway via the transitway.
On March 3, 2008, the city of Ottawa revealed four different options for its transit expansion plan, and presented at Open House consultation meetings during the same week. All plans included the construction of a downtown tunnel or subway to accommodate transit service and possible addition of businesses underground, as well as the expansion of rapid transit to the suburbs. One of the plans included light rail from Baseline Station to Blair Station and an expansion to the Ottawa Airport. All plans would have a completion date of about 2031, and costs were estimated at least $3 billion in total including $1 billion for the downtown tunnel.
The majority of the public supported a downtown tunnel and the fourth transit option during public consultations meetings in Centretown, Barrhaven, Kanata and Orleans during the month. There were some suggesting that the light-rail service be extended to the suburbs rather than ending at the proposed stations. Concerns were particularly voiced by south-end residents where the initial rail plan was to be built. On April 16, 2008, the Transit Committee tabled a document which recommended the fourth option.
The plan was passed by the city council with a vote of 19–4 and included motions for possible rail extensions to the suburbs depending on population density and available funding. However,
Kitchissippi Ward councillor
Christine Leadman expressed concerns of the environment integrity impacts of light-rail along the
Kichi Zibi Mikan which is situated on NCC land. At least three councillors, including Leadman,
Capital Ward councillor
Clive Doucet and
Kanata North Ward councillor
Marianne Wilkinson, expressed preferences for light-rail service along Carling Avenue instead of the Parkway, although rail would run through many traffic lights and stops. The NCC also suggested that the city consider options other than the Kichi Zibi Mikan. Three
Ottawa Centre candidates for the
2008 federal election – incumbent
New Democratic Party
The New Democratic Party (NDP; , ) is a federal political party in Canada. Widely described as social democratic,The party is widely described as social democratic:
*
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* The Editors of ''Encyclopædia Britann ...
MP
Paul Dewar, Liberal candidate
Penny Collenette, and Conservative candidate Brian McGarry – also expressed opposition to building a light-rail line along the Parkway.
Another potential route identified between Lincoln Fields and the Transitway near
Westboro Westboro may refer to:
Places Canada
*Westboro, Ottawa, Ontario, a neighbourhood
** Westboro Station (OC Transpo), an OC Transpo Transitway Station
United States
* Westboro (Topeka), Kansas, a residential neighborhood
* Westboro, Missouri
* Westbo ...
was a small strip of land located on the southern side of
Richmond Road near the location of the defunct Byron Avenue streetcar line although costs would be much higher than the Parkway route.
In early September 2008, city staff suggested that the first phase of the transit plan to be built would be similar to Option 3 with rail service from Riverside South to Blair Station via a downtown tunnel, the construction of a by-pass transit corridor via the General Hospital and a streetcar circuit along Carling Avenue, although Alex Cullen mentioned that Council already rejected the option of streetcars running on that road.
Confederation Line
On December 19, 2012, the city council unanimously approved the construction of the Confederation Line, to run east–west from
Blair to
Tunney's Pasture.
[ The line runs on an existing Transitway infrastructure, with the exception of the 3-stop downtown tunnel. It began service in September 2019.
]
Stage 2
Stage 2 is the ongoing project to add 44 kilometres of rail and 24 new stations in addition to stage 1 of the Confederation Line that was opened in September 2019. Initially approved in 2013, it will bring 77% of Ottawa
Ottawa is the capital city of Canada. It is located in the southern Ontario, southern portion of the province of Ontario, at the confluence of the Ottawa River and the Rideau River. Ottawa borders Gatineau, Gatineau, Quebec, and forms the cor ...
residents within of rail. The expansion began construction in Q2 2019, and is expected to be entirely complete by 2027 with the extension south complete in 2025, east expected later in 2025 and west in 2027.
The project is made up of three extensions: an eastern extension of the Confederation Line by five stations from Blair station to Trim Road, a western extension by 11 stations from Tunney's Pasture to Baseline station and Moodie station with a split at Lincoln Fields station, and an upgrade of the Trillium Line that includes two new stations along the existing alignment, an extension southwards by four stations to a new Limebank station, and a branch line
A branch line is a secondary railway line which branches off a more important through route, usually a main line. A very short branch line may be called a spur line. Branch lines may serve one or more industries, or a city or town not located ...
to the Ottawa Macdonald–Cartier International Airport.
On March 6, 2019, the Ottawa city council voted 19–3 to approve the C$4.66 billion contracts to begin construction of the Stage 2 plan. The southern extension of the Trillium Line was awarded to TransitNext (solely operated by SNC-Lavalin), while the East and West extension of the Confederation Line was awarded to East West Connectors, a partnership between Vinci SA
Vinci (; corporately styled VINCI) is a French concessions and construction company founded in 1899 as Société Générale d'Entreprises. Its head office is in Nanterre, in the western suburbs of Paris. Vinci is listed on Euronext's Paris st ...
and Kiewit Corporation. Financial close was reached with TransitNext on March 29, 2019, and a month later with East West Connectors.
Openings
On January 6, 2025, the South extension reopened Line 2 after 4 years of construction, extending it south to Limebank Station, as well as adding the Corso Italia and Walkley infill stations. Line 4, the branch to the airport, opened at the same time.
Construction
Construction began in 2019 with preliminary tree removal, utility work and road realignments. Work on the new rail yard for the Trillium Line as well as guideway work for the southward extension and airport link began over the summer of 2019. On May 3, 2020, the Trillium Line closed to allow upgrades to the existing alignment to be completed. On September 25, 2020, construction of the cut and cover tunnels for the westward Confederation Line extension began.
Future extensions
Multiple major extensions of the O-Train are currently under construction or in the planning stages. This includes the above described Stage 2, as well as a future Stage 3 expansion plan.
STO connection
The O-Train could potentially become a connection point with the proposed Gatineau LRT system, to be run by the STO, which is planned to operate partly on the Ottawa side of the river. On May 15, 2020, the city of Gatineau presented two options to integrate its proposed LRT with Ottawa's transit system: either running the new LRT on the surface along Wellington Street to Elgin Street, or constructing a new tunnel below Sparks Street to Elgin. The surface option on Wellington also includes the possibility of creating a future transit loop by having the LRT cross back into Gatineau via the Alexandra Bridge. In May 2021, Gatineau announced that it found the Sparks Street tunnel option to be the "optimal solution," while noting the surface option remains a possibility should the tunnel prove to be unfeasible.
See also
* 2016 Ottawa sinkhole
Rideau Street () is a major street in downtown Ottawa, Ontario, Canada, and one of Ottawa's oldest and most famous streets running from Wellington Street, Ottawa, Wellington Street in the west to Montreal Road in the east where it connects to ...
* Light rail in Canada
Urban rail transit in Canada encompasses a broad range of rail mass transit systems, including commuter rail, rapid transit, light rail, and streetcar systems.
Terminology
* "Commuter rail" refers to urban passenger train service between a c ...
* Light rail in North America
* List of tram and light rail transit systems
* Ottawa Electric Railway
* Rapibus
* Public transport in Canada
Notes
References
External links
*
* formerly called the Trillium Line
*
*
*
{{International Metro Organizations
21st century in Ottawa
2001 establishments in Ontario
Rail transport in Ottawa