Various studies, from 1989 onwards, considered the reintroduction of trams to Edinburgh. In 2001, a proposal for a new Edinburgh Trams network envisaged three routes across the city, Lines 1, 2 and 3. Line 1 was a circular route running around the northern suburbs, with the other two forming radial lines running out to Newbridge in the west and to Newcraighall in the south respectively. All lines would run through the city centre.

Line 3 was later shelved due to lack of Scottish Parliament approval. Lines 1 and 2 were combined and split into three phases, with Phase 1 being further divided into Phase 1a and 1b. Phases 1b, 2 and 3 were not funded.

When the tramway opened to passengers in 2014, only a truncated section of the planned Phase 1a line (running from the airport to the city centre) had been constructed. Construction of the remainder of the Phase 1a line began in 2019, and it opened to passengers in 2023.

In August 2025, a public consultation was launched for an additional extension serving the north–south axis of the city. This could link Granton in the north via either the Roseburn Path to Murrayfield or via Orchard Brae and Dean Bridge to the west end of Princes Street. There are also proposals to run trams over North Bridge and South Bridge to Cameron Toll then along Old Dalkeith Road to the Royal Infirmary and BioQuarter. The cost is estimated at between £2bn and £2.9bn. This comprises sections of the original Lines 1 and 3.

Line 1 (North Edinburgh)

Line 1 was planned to be a circular route with 22 stops running around the northern suburbs, following a route from the City Centre, St Andrew Square, York Place, Picardy Place, down Leith Walk to Leith and Newhaven. The line would then run along the waterfront to Granton, where it would then loop back, taking over the disused Caledonian Railway route between via Crewe Toll to Wester Coates and Haymarket. Upon reaching Haymarket, trams will return to on-street running mode and head back along Princes Street.

Line 1 comprised of on-street track integrated with other traffic, of segregated track running along existing roads, and separate tramway. The on-street sections of track would be in the centre of the road in some locations and at the kerbside in others. On the disused line to Granton, the tram line would be integrated with cycle and pedestrian pathways along the Roseburn wildlife corridor.

In the initial Phase 1a of the project, only the Newhaven-Leith Walk-Princes Street section of this route was included, with trams then continuing west to the airport (Line 2 route). Further construction of the Line 1 loop (Phase 1b of the project) was cancelled in 2009 due to financial constraints, postponing construction of the Haymarket-Granton section of this line indefinitely. Phase 2, which would complete the loop with a line from Granton Square to Newhaven, also remains unfunded.

Name Phase Transport Interchange Serves Haymarket Phase 1a Haymarket railway station Lothian Buses Line 2 (West Edinburgh) Edinburgh International Conference CentreSt Mary's Music School Shandwick Place Phase 1a Princes Street Phase 1a Princes StreetNational Gallery of Scotland St Andrew Square Phase 1a Lothian BusesEdinburgh Bus Station Waverley Station St Andrew SquareSt. James Centre Picardy Place Phase 1a Omni CentreEdinburgh Playhouse McDonald Road Phase 1a Easter Road Stadium Balfour Street Phase 1a Pilrig Park Foot of the Walk Phase 1a Lothian Buses Bernard Street Phase 1a Port of Leith (formerly Ocean Drive) Phase 1a Scottish Government building Ocean Terminal Phase 1a Ocean TerminalRoyal Yacht Britannia Newhaven Phase 1a Newhaven Lower Granton Phase 2 Granton (formerly Granton Square) Phase 1b Saltire Square (formerly Granton Waterfront) Phase 1b Caroline Park Phase 1b Edinburgh College (Granton Campus) West Pilton (formerly West Granton) Phase 1b Crewe Toll Phase 1b Lothian Buses Fettes CollegeLeonardo S.p.A. (Edinburgh Site) Telford road Phase 1b Western General Hospital Craigleith Phase 1b Craigleith Retail Park Ravelston Dykes Phase 1b Scottish National Gallery of Modern ArtStewart's Melville CollegeThe Mary Erskine SchoolSt. George's School Roseburn Phase 1b The line continues to Haymarket to complete the loop

Line 2 (West Edinburgh)

Line 2 would have been an route from the City Centre out to Edinburgh Airport via Edinburgh Park, with a branch line to Newbridge and a total of 19 stops. The airport route was subsequently incorporated into Phase 1a of the project. The branch to Newbridge is dependent on funding becoming available for Phase 3 of the construction project.

In Phase 1a, from St Andrew Square to Haymarket, a line of on-street track integrates with other traffic along Princes Street and Shandwick Place. At Haymarket station, the tram line diverges from the road and runs down a segregated tramway via Haymarket Yards. The Line 1 branch north towards Granton (Phase 1b) would be located at the bridge over Russell Road. The Phase 1a line continues west, past the Haymarket rail depot and Murrayfield Stadium. Trams then move onto a dedicated track running parallel to the Edinburgh-Glasgow railway line, briefly crossing south of the railway to serve Sighthill and Edinburgh Park, before heading north, parallel to the City Bypass to the Gyle. The tramway then passes under the A8 road just the east of the Gogar Roundabout, turns west over green belt land, and then north behind the Hilton Hotel and alongside the Gogar Burn to a terminus within the existing airport bus station.

The planned branch to Newbridge would begin at the Ingliston stop, continuing west past the Royal Highland Showground, before crossing onto the central reservation of the A8. It would then turn south via Ratho Station to rejoin the Glasgow main line. At Harvest Road trams would switch to street-running mode again, sharing the road with traffic to the Newbridge industrial estate before crossing the A89 road and terminating at the Newbridge roundabout.

A preliminary guided bus service along part of the future route of Line 2, Fastlink, opened in December 2004. This concrete track, which ran parallel to the Edinburgh-Glasgow railway line from Saughton to Edinburgh Park, was converted to a tram track, replacing the guided bus service with the tram line.

On 27 September 2007, the Scottish Government announced the cancellation of the Edinburgh Airport Rail Link, a separate project to link mainline rail services to Edinburgh Airport. As an alternative, the government plans that an additional stop is built adjacent to a proposed Gogar railway station be constructed. This newly built rail station and tram stop would provide an interchange on the Fife Circle Line with airport tram services. Costs for this have not been stated and would be in addition to the currently budgeted-for amount.

The station in the Gogar area, just prior to the Gogarburn tram depot when going westbound, was opened on 11 December 2016, linking the Fife Circle Line to the Edinburgh tram network. It is called Edinburgh Gateway station.

Name Phase Transport Interchange Serves Between the city centre and Haymarket, trams run along Line 1. Haymarket Phase 1a Haymarket Lothian Buses Line 1 (North Edinburgh) Edinburgh International Conference Centre Murrayfield Stadium Phase 1a Murrayfield Stadium Balgreen Phase 1a Edinburgh Zoo Saughton Phase 1a Bankhead Phase 1a Stevenson College Edinburgh Park Phase 1a Hermiston Gait retail park Edinburgh Park Central Phase 1a Edinburgh Park Gyle Centre Phase 1a Gyle Shopping Centre Gogarburn Phase 1a Royal Bank of Scotland headquarters Ingliston Park & Ride Phase 1a Lothian Buses Line splits – Edinburgh Airport branch Edinburgh Airport Phase 1a Edinburgh Airport Newbridge branch Ingliston West Phase 3 Royal Highland Showground Ratho Station Phase 3 Newbridge South Phase 3 Newbridge North Phase 3

Line 3 (South East Edinburgh)

The proposals also featured a third tram line, which would run from the City Centre to the southern suburbs. The route was not finalised, but proposals indicated a preferred route would cross North Bridge and the Royal Mile, heading south past the University of Edinburgh, along Nicolson Street. An alternative route suggested trams could bypass the congested Nicolson Street and Clerk Street section by turning right into Nicolson Square and heading south along Potterrow. Southbound trams would return to Newington Road via West Preston Street, and a northbound track would run along Causewayside. A segregated track was proposed to cross Cameron Toll, and after crossing the Inch Park, trams would then run down the Old Dalkeith Road towards the Royal Infirmary of Edinburgh, and finally terminating at Newcraighall railway station park and ride. An extension to Musselburgh was also considered. City councillors also suggested that a route via London Road might be considered as an alternative extension to the network.

Line 3 was not approved by the Scottish Parliament and was not funded. Funding for the line depended on Edinburgh voters agreeing to a congestion charge, which was rejected in the Edinburgh road tolls referendum in 2005. Following the referendum defeat, Edinburgh City Council applied to the Scottish Government for £198 million funding for the line, but this request was turned down. As such, the proposal was put on hold indefinitely and does not form part of the approved phases, but the land needed for the line was protected until at least 2015.

Name Phase Transport Interchange Serves Waverley station N/A Waverley Station Lothian Buses Line 1 (North Edinburgh) High Street N/A Royal Mile South Bridge N/A Nicolson Square N/A University of Edinburgh George Square campus St Patrick Square N/A The Meadows N/A The Meadows Newington Road N/A Newington Minto Street N/A Newington Station N/A Interchange with South Suburban Railway at Newington Station Craigmillar Park N/A University of Edinburgh King's Buildings campus (at some distance) Cameron Toll N/A Cameron Toll Shopping Centre The Inch N/A Moredun N/A Moredun RIE/Bio Medipark N/A Royal Infirmary of Edinburgh Greendykes N/A Greendykes Craigmillar N/A Craigmillar Niddrie N/A Niddrie The Wisp N/A Fort Kinnaird N/A Fort Kinnaird retail park Newcraighall N/A

Revised north–south proposal (Granton to BioQuarter) During the early 2020s, plans were developed for a revised north–south tram line which would connect Granton in the north of the city with the Bioquarter in the south east, and possibly further onto either Dalkeith or Queen Margaret University or Shawfair. At a meeting on 1 February 2024, City of Edinburgh Council voted to put the proposed north–south extension to public consultation; by this point, it had an estimated construction cost of £2bn.

In August 2025, a 12-week public consultation was launched for this extension serving the north–south axis of the city. This could link Granton in the north to Crewe Toll, then either via the Roseburn Path to Murrayfield or via Orchard Brae and Dean Bridge to the west end of Princes Street. To the south, the proposals would see trams run over North Bridge and South Bridge, through Newington to Cameron Toll along Lady Road, then along Old Dalkeith Road to the Royal Infirmary and BioQuarter at Little France. A lift connecting the North Bridge tram stop to Waverley railway station below is also proposed.

The cost is estimated at between £2bn and £2.9bn depending on the option considered. The consultation will help inform a Strategic Business Case which will be presented to the council's Transport and Environment Committee in 2026. In December 2025, Scottish Government Transport Secretary Fiona Hyslop noted that while they are looking to develop a mass transit system known as "Sestrans" covering south east Scotland, "The Scottish Government has no plans to fund a standalone extension of Edinburgh’s tram network", which is being promoted by Edinburgh Council.