Four stations—Neuville, Chet, Pensée, and Centenaire—on the Châtelet branch of the light rail system in Charleroi have been unused since 1986. These stations were built, equipped, and connected to the network, but no train has carried passengers there in nearly 40 years. The Châtelet branch was part of a larger plan from the 1960s, which aimed to create a 52 km light rail network with 8 radial branches, a central loop, and 69 stations. The Châtelet branch was intended to be about 4 km long, with construction reaching Centenaire in 1986 before the project was halted. Two other stations on the route had only structural work completed, and the rest of the branch was never built. The four stations have suffered from vandalism over the years and were maintained only minimally. The Centenaire building was demolished in the 2010s. However, the section was not entirely abandoned. The track up to Chet, now known as Yernaux station, has been used for driver training. In March 2017, "ghost metro" tours allowed visitors to walk the empty platforms, though they did not become regular users. Chet also houses a high-voltage substation that powers the network, and TEC staff return there for maintenance. Construction of the M5 line, which will be 5.5 km long, resumed in June 2021 with 60 million euros from the European recovery plan. The total cost of the project is 108 million euros, and passenger service is scheduled for August 2027, after two delays. The building permit was issued in January 2023, and construction has proceeded steadily for three years. The M5 line will have 16 stops, 8 of which are to be built or rebuilt. It will upgrade the four 1986 stations, complete the two that remained at the structural stage, and create two new ones: Corbeau and Les Viviers. According to Laurent Blanchart, director of LETEC Charleroi, the line will connect the Viviers area, where the Grand Hospital of Charleroi is located, to the central station in 20 minutes. The 34 renovated motor cars are being produced by Alstom at a rate of one per month. The August 2027 opening date has been postponed twice, from the end of 2026 to April 2027, then to the summer. The delay is officially due to the recruitment and training of new drivers. The schedule now includes a testing phase, followed by a month of trial operation in July 2027. About 300 employees must be trained for this line. The areas around the stations, signaling adjustments, escalators, elevators, fire detectors, and lighting remain to be completed. The four 1986 stations are now being renovated, and the underground Centenaire station will host an artwork titled Un monde parallèle, signed by Thierry Van Hasselt and Marcel Schmitz.