RegionalBahn

Regionalbahn (RB) is a designation used for local passenger rail services in German-speaking countries, most prominently in Germany. It refers to regional trains that operate on shorter, primarily regional routes and stop at most or all stations along their line. RB services provide frequent, locally oriented mobility and are designed to connect towns, suburbs, and rural areas with nearby cities.

In Germany, RB trains are typically operated by Deutsche Bahn or by private rail operators under contract with state or municipal transportation authorities. They are part of the regional network alongside Regional-Express (RE) services, which are faster and stop at fewer stations. The RB category is used in timetable designations with the prefix RB and a line number (for example, RB 1). Rolling stock for RB services ranges from electric to diesel multiple units, chosen to match line electrification, terrain, and capacity.

RB services play a key role in integrating regional mobility with other modes of public transport. They are usually coordinated within local or regional transport associations, enabling cross-ticketing and fare integration with buses, trams, and other services. This integration aims to provide seamless travel for commuters, students, and other regional travelers.

Beyond Germany, the term regional or Regio-Bahn is used in some neighboring countries with variations in scope and operation. Although the exact definitions differ by country and operator, the core concept remains a locally oriented, stop-at-most-stations service designed to improve regional accessibility and connectivity.