East The east Transitway currently consists of a series of intermittent bus-only lanes along
Regional Road 174 between Blair and Place d'Orléans. It will be replaced by an east extension of
Line 1 when it opens in 2026.
Southeast The southeast Transitway is a dedicated busway adjacent to some rail corridors between Hurdman and South Keys.
Central The central Transitway was a dedicated busway between Pimisi (formerly LeBreton) and Dominion stations. The Pimisi to Bayview segment was closed in January 2016 for O-Train Stage 1 construction and the Bayview to Tunney's Pasture segment was closed in June 2016. In June 2022, the remaining segment of the central transitway west of Tunney's Pasture was closed for O-Train Stage 2 construction, with buses now running along dedicated bus lanes on Scott Street. A temporary Transitway was built from Dominion station to the intersection of Churchill Road and Scott Street. The new Transitway travels over the old one via the bailey bridge and then alongside until the intersection of Scott / Churchill. Route 12 serves central transitway stations between Rideau and Tunney's Pasture including Parliament and Lyon stations.
Downtown The former downtown section of the Transitway consisted of two single bus-only lanes on Albert and Slater Streets (one-way public streets in opposite westbound and eastbound directions, respectively), with stops in each direction at Bay, Kent, Bank and Metcalfe Streets as well as on the
Mackenzie King Bridge. Traffic congestion here, where the buses mingle with private vehicles, often caused service delays and was seen by some as the main weakness in the Transitway system. Initial plans for the Transitway included a bus-only tunnel in this section but the cost of a ventilated tunnel for conventional buses was deemed too expensive and was not warranted at the time. In 2006, it was proposed to extend the
O-Train downtown as a tramway over the same streets while keeping existing bus and car traffic. The idea was met with objections from businesses along those streets, as normal access to the businesses would be impeded. In 2019, the
Confederation Line opened, replacing the downtown portion of the Transitway with an underground, high-capacity
rapid transit rail line. This service change greatly reduced the number of buses travelling on Albert and Slater streets.
Greenboro Busway This former section of Transitway was a two lane bus-only
corridor between Cahill and Lorry Greenberg Drives in the Greenboro neighbourhood in south Ottawa. Part of a planned neighbourhood in 1984, it opened in 1987 while the neighbourhood was still being developed. It was opened as a corridor with no stations, as it was planned to extend to
Conroy Road once the neighbourhood was completed. It ran mostly without issue, servicing two routes and providing service during regular and peak periods. As time went on, the planned neighbourhood's density was heavily reduced due to heavy backlash from the local community using the slogan “buses out of backyards”. By 1989,
OC Transpo began phasing out the corridor, and by 1990 it was declared surplus lands. On September 2, 1995, OC Transpo ran its final bus on the corridor, and it was then gated up and left abandoned for the next 7 years. After being sold to the city, it was officially fully removed by 2002.
Southwest The southwest Transitway includes a dedicated busway from
Lincoln Fields to
Baseline. Buses then travel on reserved lanes before joining a busway before Fallowfield. This busway extends from Fallowfield to
Barrhaven Centre. A separate median busway east of Marketplace connects Beatrice and Nepean Woods before traveling along reserved lanes to Riverview. There are plans to extend the transitway to Limebank. Route 110 offers station to station service between Limebank and CitiGate.
West The west Transitway consisted of a dedicated busway between Pinecrest and Moodie, however the section between Moodie and Bayshore closed permanently in September 2021, followed by the section between
Bayshore and
Pinecrest in April 2022. Buses also use reserved lanes on
Highway 417 between Moodie and Eagleson. ==See also==