The construction of the M4 metro line at the San Cristoforo station has experienced significant delays, causing a dispute between the Municipality of Milan and the construction company Webuild. Originally expected to be completed by September 2024, the finishing works on the surrounding area have been delayed by an additional year and a half, affecting both the railway station and the completion of a pedestrian bridge. Mayor's office Palazzo Marino expressed concerns over the slow progress of the project, citing a lack of workforce as a contributing factor to the delays.

As the M4 metro line was scheduled to open in October 2024, the incomplete work at the San Cristoforo station paints a troubling picture for local commuters and the municipality itself. The delays have prompted the Municipality to formally contest the situation with Webuild, demanding not only the timely completion of the work but also reparations for the setbacks faced during the construction process. The economic implications of this dispute could significantly impact future infrastructure projects in Milan if not resolved positively.

With the deadline now pushed to spring 2025 for the completion of the necessary construction, including the public square adjacent to the station and the pedestrian walkway, there are growing concerns regarding the overall impact on city infrastructure and commuter experiences. The ongoing legal and financial disputes underline the complications involved in large scale urban projects and highlight the importance of efficient contractor performance.