The two future northeastern lines of the Île-de-France region, which are part of a larger project to expand the regional rail network around Paris, have faced significant delays. These lines are intended to improve transportation links and reduce congestion in the area, but recent setbacks have pushed back their completion dates. The delays are attributed to a combination of factors, including complex engineering challenges, supply chain issues, and the need to coordinate with various stakeholders. These problems have slowed progress and raised concerns about the timeline for the project's completion. Experts suggest that these delays may have long-term implications for the region's transportation plans. The original schedule aimed to have the lines operational by a specific date, but with the current delays, it is unclear when they will be ready for use. Despite these challenges, officials remain committed to the project and are working to resolve the issues. They emphasize the importance of the lines in enhancing mobility and supporting the region's growth. Updates on the project's progress are expected in the coming months.