Thessaloniki Metro reshapes travel in Greece’s second city

Thessaloniki’s long-awaited metro is transforming daily travel in Greece’s second-largest city, blending cutting-edge driverless technology with a striking display of the archaeological treasures uncovered during its construction.

A long-delayed project finally enters service

The Thessaloniki Metro opened to passengers on November 30, 2024, after decades of planning and a construction effort that began in its current form in 2006. Publicly available information shows that the first operational route, commonly referred to as Line 1 or the Base Project, now runs beneath the city’s main thoroughfares with 13 stations in service and several more due to follow.

The opening marked the end of one of Europe’s more protracted urban transport projects, repeatedly slowed by financial crises, contractual disputes and the sheer complexity of building beneath a dense, historically layered city. Reports indicate that the metro’s central section alone required years of tunnelling under congested boulevards and busy seafront districts while trying to keep traffic and commerce moving on the surface.

According to published coverage, the initial line extends roughly 9.5 to 10 kilometers across the urban core, linking western districts near the intercity bus and rail hubs with eastern neighborhoods and the main depot at Pylaia. For residents long accustomed to crowded buses and heavy road congestion, the new system represents the first high-capacity alternative within the city itself.

Local and international reporting portrays the launch weekend as a landmark civic moment, with large crowds queuing to ride the system despite poor weather. The enthusiasm reflected both relief at the end of years of disruption and curiosity about the technology and architecture of Greece’s newest underground railway.

Driverless technology and high-frequency service

The Thessaloniki Metro is Greece’s first fully driverless urban rail system, using a high level of automation for train movement, door operation and platform safety. Technical documentation and company materials describe the system as operating at the highest automation grade used in modern metros, allowing trains to run under continuous digital supervision from a central control center.

The network uses four-car trains supplied by Hitachi Rail, built in Italy and tailored to Thessaloniki’s tunnels and platforms. Each train is approximately 51 meters long and designed to carry around 450 passengers at standard comfort levels, with room for more in peak conditions. The trains draw power from a third-rail system and incorporate platform screen doors at stations, improving both safety and climate control.

Project partners highlight the use of communications-based train control, a signaling technology that enables short headways and precise real-time control of train spacing. Promotional and technical material suggests the line is capable of handling as many as 18,000 passengers per hour in each direction, with theoretical peak intervals of around 90 seconds between trains once full service patterns are implemented.

In practice, initial timetables have focused on reliability and gradual ramp-up of frequencies as the system settles into daily use. Industry analyses point out that the driverless design gives operators flexibility to adapt service levels quickly to demand, whether during major events at the port and waterfront or routine peak-hour surges along the city’s north–south commuting axis.

An underground archaeological showcase

One of the most distinctive features of the Thessaloniki Metro is the way it incorporates archaeological discoveries into its stations. Excavations along the route uncovered a dense layering of Roman, Byzantine and Ottoman remains, especially in the historic core where ancient streets, marketplaces and religious buildings once stood.

Academic commentary and heritage reports note that Venizelou station has become a focal point for this approach. During construction, archaeologists revealed the intersection of the city’s ancient main roads, along with shops, public buildings and infrastructure that once lined a bustling avenue. Rather than remove the finds entirely, planners redesigned the station so that substantial sections of the ancient streetscape remain in situ beneath glass walkways and viewing platforms.

Other central stations, including Dimokratias and Aghia Sofia, also present significant remains, from early Christian cemeteries to Ottoman-period commercial structures. Publicly available information shows that these stations have been treated as hybrid spaces, part transport node and part compact museum, with interpretive panels and digital reconstructions explaining the context of the exposed layers.

Cultural commentators describe the metro as a powerful illustration of how major infrastructure projects can both challenge and enrich urban heritage. The prolonged delays caused by archaeological work were a source of local frustration for years, yet the completed stations now offer residents and visitors rare access to the historical fabric that lies beneath modern Thessaloniki.

Current operations and passenger experience

Operational data released since the opening indicates that the first line currently serves 13 underground stations, all equipped with platform screen doors, escalators and elevators. Stations follow a broadly consistent architectural language, with clean-lined platforms, bright lighting and prominent use of stone, glass and metal finishes. In central locations, passenger areas are punctuated by display cases and exposed structures linked to the city’s past.

Ticketing reportedly combines traditional paper products with contactless options, integrated with the wider urban transport network. Early coverage highlighted some challenges in preparing the fare system ahead of inauguration, but subsequent reports suggest that passengers now use a mix of stored-value cards, single-ride tickets and passes to transfer between metro and bus services.

Travel time across the operational section has been cited as one of the system’s strongest advantages. Journeys that could easily exceed half an hour by bus in congested traffic are now significantly shorter and more predictable underground. Passengers also benefit from the metro’s protection from weather conditions that can affect surface transport along Thessaloniki’s exposed waterfront and hillside districts.

Ridership figures for the first months have not been consolidated into a long-term trend, but observers note strong initial demand, particularly at central interchanges and near universities. The combination of frequent, level-access trains and fully step-free stations is expected to improve mobility for people with reduced movement, parents with strollers and travelers carrying luggage to and from intercity rail and bus terminals.

Planned extensions toward suburbs and airport

Even as the base network beds into daily operation, planners are pushing ahead with additional sections intended to broaden the metro’s reach. According to publicly available project information, a separate line, sometimes referred to as Line 2 or the Kalamaria extension, is under construction to connect eastern coastal districts with the central section and depot. This line is expected to enter service after Line 1, adding new stations in residential and waterfront areas.

Longer-term plans foresee the metro advancing northwest toward suburban municipalities such as Stavroupoli and Evosmos and eventually linking with major hospital complexes on the city’s outer ring road. These segments would provide higher-capacity alternatives to heavily used radial bus routes serving growing suburbs.

A further strategic goal, referenced in corporate and government planning documents, is the connection of the metro to Thessaloniki’s Macedonia International Airport. Realization of an airport link would give the city a direct, high-frequency rail connection from terminal to center, similar to those found in other European metropolitan areas. Timeframes for this phase are still indicative rather than fixed, reflecting the scale of funding and engineering required.

For travelers, the gradual expansion of the network is set to reshape how they navigate northern Greece’s primary gateway city. What began as a contested and frequently delayed project is evolving into a backbone of urban mobility, combining driverless rail technology with a vivid cross-section of Thessaloniki’s 2,000 years of urban history.