To begin with it is one of the east-west links across the Elbe-Weser Triangle and runs in a gentle curve via Bremervörde (48 km, briefly with the B 74) and Zeven (71 km) over the Hansa Line A 1 (83 km) to the district town of Rotenburg (Wümme) (97 km).
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After leaving the Bremerhaven – Hamburg route, which is still used by passenger trains, it heads southwards into a region of sprawling geest countryside with numerous pine woods, running parallel to the B 71 through Bevern, Deinstedt, Selsingen, past the former concentration camp at Sandbostel, through Seedorf and Godenstedt to Zeven.