Contrack in Poznań - Wierzbięcice tram switch

A comprehensive reconstruction of a key transport hub is underway in Poznań at the intersection of Wierzbięcice, Matyi, Niezłomnych and Królowej Jadwigi streets, as part of the construction of a new tram line along Ratajczaka Street — one of the largest and most complex infrastructure projects carried out in recent years within dense urban development.The works involve extensive logistical preparation, detailed coordination of underground utilities, reconstruction of road and traction infrastructure, and numerous technical arrangements with municipal services and contractors. Already at the design stage, it was necessary to consider not only the complex track geometry, but also dense urban surroundings, existing underground infrastructure, and the everyday mobility needs of residents, making this junction one of the most demanding construction sites in Poznań.

Progress of track works using CONTRACK technology

Prefabricated track slabs in CONTRACK technology were delivered to the construction site in Poznań in January 2026, followed by systematic deliveries of subsequent batches in line with the schedule, enabling smooth installation and coordination with parallel infrastructure works. The first stage, involving the installation of part of the track and turnouts, was completed as early as February 10. The second stage, finalized at the end of March, included further track sections, installation of remaining prefabricated elements, and precise adjustment of turnouts within the junction. With each stage, the track structure became increasingly visible, and the Wierzbięcice junction gradually took shape. Thanks to CONTRACK technology, the installation process was significantly faster than with traditional methods — a reduced number of joints and large-format prefabricated elements allowed for precise fitting, while concrete curing in factory conditions enabled uninterrupted work regardless of winter conditions. A total of over 2,365 m² of prefabricated slabs were used in the project, with an average element size of approximately 19 m² and the largest reaching up to 26.4 m². Around 850 m³ of concrete was used in production, ensuring high durability and structural performance of the track system.

Supporting works

Alongside the installation of prefabricated elements, extensive works were carried out on underground infrastructure, including sewer, water, and energy networks, as well as track drainage systems and foundations for traction poles. The project also includes reconstruction of roads, sidewalks, and public space surrounding the junction, which will significantly improve the functionality and comfort of the area.

Restoration of tram traffic

A key milestone in the project was the test run conducted on the night of March 26–27, 2026, when a tram successfully passed through the newly constructed track system. The test confirmed the readiness of the infrastructure for passenger traffic. Thanks to efficient site management, well-planned logistics of prefabricated element deliveries, and the use of CONTRACK technology, track works progressed significantly faster than originally planned. This made it possible to restore tram traffic on the Wierzbięcice–Matyi section as early as April 2, 2026 — approximately three months ahead of schedule.

Winter did not stop the works

One of the key advantages of using prefabricated track slabs in CONTRACK technology is the ability to carry out construction works even during winter, without long technological breaks. Low temperatures, snowfall, and limited daylight hours do not significantly impact the pace of the project, as the most sensitive process — concrete curing — is entirely transferred to the prefabrication plant. There, the concrete undergoes full hydration under controlled temperature and humidity conditions, achieving the required strength parameters before delivery to the construction site. On-site work is therefore limited to the installation of prefabricated elements and their precise geometric adjustment.