The Regions of Brittany and Pays de la Loire have announced plans to boost the TER (Transport Express Régional) rail service along the Rennes-Nantes route, beginning in September 2027. This enhancement aims to increase rail connectivity between the two major cities in northwestern France, which are about one hour and 15 minutes apart by train. The improved service will result in a 30 percent increase in train frequency, ensuring nearly one train departs every hour on weekdays. Passengers can expect 26 TER connections daily from Monday to Friday and 16 on weekends. The expansion is part of a broader effort to improve regional transportation and support economic and social development in the area. This increase in service is expected to make travel between Rennes and Nantes more convenient, especially for commuters and travelers who rely on rail transport for daily or weekly trips. In addition to the Rennes-Nantes route, the plan includes four additional daily train connections on the Quimper-Vannes rail axis from Monday to Friday. These new services will complement the 17 additional services already introduced on the same route since September 2025, as part of the BreizhGo Express Sud project. This initiative aims to enhance regional mobility and provide more reliable and frequent rail connections across Brittany. The upgrades are expected to support local economies by improving access to jobs, education, and services. They also align with broader goals to reduce reliance on cars and promote more sustainable forms of transportation. The changes are part of an ongoing effort to modernize and expand the regional rail network in France.