Construction of Finland's longest bridge, the Kruunuvuorensilta in Helsinki, has progressed to the trial phase for tram operations, set to commence on March 17. The trials will cover the entire route of the Kruunusillat tram line, connecting Hakaniemi to Laajasalo's Yliskylä. According to the Kruunusillat project team, these trials are essential to ensure the functionality and safety of the tram infrastructure, including the switch control systems and traffic lights.

The trial runs are scheduled to take several weeks but will not occur daily. Predominantly, testing will take place on weekdays between 7 AM and 6 PM, with possible weekend testing if required. During this time, pedestrian and cyclist access will be restricted, allowing crossing only at designated pedestrian crossings. These crossings will be marked by a tram image painted on the asphalt, and the absence of pedestrian traffic signs on the median strips clearly indicates where tram interaction occurs.

Safety measures are a priority during the trials, with specific regulations ensuring that pedestrians and cyclists yield to trams at crossing points. The testing phase aims to assure that the tram line operating on the longest bridge in Finland meets safety and efficiency standards before its official launch for regular public transit usage, signifying a major advancement in Helsinki's public transport infrastructure.