The Thessaloniki Metro will resume normal operations early Saturday following a nearly month-long suspension that allowed testing to be completed on the system’s long-awaited extension to the eastern outlying district of Kalamaria.

Services will resume at 4:45 a.m. on June 20, according to the operator. During the first two weeks after reopening, trains will operate on the existing route between the New Railway Station and Nea Elvetia, as they did before the shutdown.

Before mid-July, however, nearly all trains assigned to the main line are expected to enter commercial service. Trains designated for the Kalamaria extension will begin operating on a transitional basis, carrying passengers as far as the 25 Martiou station, where riders will be required to disembark.

Metro officials said that after July 10 passengers will see two separate destinations displayed on station information boards and train announcements. During the transition period, services marked for Kalamaria will continue to up to the 25 Martiou station until the extension receives its final certifications.

Full operation of the extension is expected to begin by the end of July, once the certification process is completed.

The reopening marks another step in the gradual rollout of Thessaloniki’s new single-line metro network, a project that entered service late last year after decades of delays, archaeological discoveries and repeated revisions to construction schedules. The Kalamaria extension is expected to significantly improve public transport access to eastern districts of Greece’s second-largest city and increase overall passenger capacity.