Carriage of public passenger transport by bus in Lininebündel 4 Warburger Börde in Höxter. The start of operations is scheduled for 1.8.2020. The operation ends on 31.7.2027.

The tender line 4 Warburger Börde comprises the following traffic routes:

- R34 Regionalbus Borgentreich - Stage - Körbecke - Rösebeck - Daseburg - Warburg,

- R35 Regionalbus Warburg - Dössel - Großeneder - Lütgeneder - Borgentreich,

- R37 regional bus Scherfede - Rimbeck - Ossendorf - Warburg - Doessel - Großeneder - Lütgeneder - Borgentreich - Natzungen - Borgholz - Dalhausen - Beverungen - Lauenförde - Würgassen - Herstelle - Bad Karlshafen ("bison line"),

- R38 regional bus Warburg - Hohenwepel - Engar - Ikenhausen - Leuven - Peckelsheim,

- 511 Schulverkehr Rimbeck - Bonenburg - Ikenhausen - Leuven - Peckelsheim,

- 531 School traffic Warburg - Hohenwepel - Daseburg - Doessel - Warburg,

- 532 school traffic Borgentreich - stage - Muddenhagen - Manrode,

- 565 school traffic Peckelsheim - Eissen - / - Schweckhausen - Willegassen - Borgentreich,

- Special transports Warburger October week in Warburg More details regulate the tender documents.