In October 1998, Line 14 was inaugurated. It was the first fully new Métro line in 63 years. Known during its conception as Météor (Métro Est-Ouest Rapide), it is one of the three fully automatic lines within the network along with Line 1 and Line 4. It was the first with platform screen doors to prevent suicides and accidents. It was conceived with extensions to the suburbs in mind, similar to the extensions of the line 13 built during the 1970s. As a result, most of the stations are at least a kilometre apart. Like the RER lines designed by the RATP, nearly all stations offer connections with multiple Métro lines. The line initially ran between Saint-Lazare and Olympiades and was subsequently extended north to Mairie de St.Ouen in 2020.
