RB 81

RB 81 is the designation of several regional rail services in Germany:


 * , operated by DB Regio Bayern between Steinach (b Rothenburg o. d. Tauber) and Neustadt (Aisch)
 * , operated by DB Regio Mitte between Trier and Koblenz
 * , operated by DB Regio Nord between Bodenfelde and Nordhausen
 * , operated by DB Regio Nord between Hamburg and Bad Oldesloe
 * , operated by Erzgebirgsbahn between Chemnitz and Olbernhau-Grünthal
 * , operated by VIAS between Darmstadt and Eberbach