The Metropolexpress, abbreviated MEX, is a train type introduced in June 2021 for local rail passenger transport in Baden-Württemberg.
On behalf of the responsible Public Transport Authority, the Nahverkehrsgesellschaft Baden-Württemberg (NVBW), the following connections are offered, all of which are linked in Stuttgart: [2][3] Within the core area designated as MEX routes, trains run every half hour.
Before the renaming to MEX, the lines, with the exception of MEX 14, were for the most part already served by Regionalbahn (RB) or Regional-Express (RE) trains every half hour under the same or similar line number.
In the context of the Reactivation of the Black Forest Railway, a Metropolexpress between Stuttgart and Calw is also under discussion, but its implementation is not included in the concept of the Ministry of Transport Baden-Württemberg.
As part of the negotiations between the federal state and the Schwarzwald-Baar-Kreis, in addition to the electrification of the Ringzug network, the establishment of a Metropolexpress Villingen-Stuttgart connection via the previously non-electrified Rottweil-Villingen railway was agreed.