In 1969, Metz politician Raymond Mondon requested a study of a fast train from Paris to Strasbourg along the route of the planned A4 autoroute. In 1970–71, the International Union of Railways (UIC, based on its French acronym) developed a master plan of fast intercity connections in continental Europe. Its connection between Paris and Strasbourg was very similar to the route of the LGV Est. The UIC master plan called for this line to be constructed shortly after Paris-Lyon and Paris-Brussels lines. In 1974, the director of SNCF confirmed that the company wanted to follow the UIC master plan.