Mainz Hbf to Heidelberg Hbf train with Deutsche Bahn (ICE,IC,RE,EC,RB)

Deutsche Bahn (DB) is Germany’s main train operator, running around 40,000 domestic and international services each day. Its fleet includes a variety of train types: high-speed ICE (Intercity Express) trains, reaching up to 300 km/h; IC (Intercity) and EC (EuroCity) trains for long-distance travel; and IRE (Interregio-Express), RE (Regional Express), and RB (Regionalbahn) services for regional and local connections. While bathrooms are standard on all trains, amenities such as onboard restaurants and free Wi-Fi are available only on certain train types and routes. DB offers a wide range of fares, including Super Saver, Saver, and Flexible tickets, along with discount cards like the BahnCard 25, 50, and 100. Additional options include single tickets, day tickets, and group tickets. Popular routes include Berlin–Munich, Hamburg–Frankfurt, Cologne–Stuttgart, Berlin–Dresden, and Hamburg–Cologne, as well as numerous regional services across Germany.

Hessische Landesbahn (HLB) is a regional transport company owned by the German state of Hesse, headquartered in Frankfurt am Main. It provides extensive bus and rail passenger transport services within Hesse and extends its operations into neighboring states like Bavaria, Lower Saxony, North Rhine-Westphalia, Rhineland-Palatinate, and Thuringia. HLB operates as a holding company with subsidiaries managing rail services (HLB Hessenbahn GmbH), bus services (HLB Hessenbus GmbH), and infrastructure/vehicle resources (HLB Basis AG). Their diverse fleet includes modern train types such as Stadler FLIRT, Alstom LINT, and Coradia Continental trains. Tickets from Deutsche Bahn are also valid on HLB trains.