 The line ran from Princes Risborough north to meet the Great Central at Grendon Underwood, about north of Quainton Road.The new line was to cross the Tramway on a bridge immediately east of Wotton station; no intersection was built between the lines.A temporary siding was built from the Tramway onto the embankment of the new line, and was used for the transport of construction materials and the removal of spoil from the works during the building of the new line.