As part of an upgrade to allow three-car trains, strengthening work was necessary at the Delta Junction north of . It was decided to include this in a plan for further grade separation to eliminate the conflict between services to Stratford and from Bank. A new timetable was introduced, with improved frequencies at peak hours. The new grade-separated route from Bank to Canary Wharf is used throughout the day, bypassing West India Quay station until mid-evening. Work on this project proceeded concurrently with the three-car upgrade work and the 'diveunder' (sometimes referred to as a flyunder but DLR have coined the term in this instance 'diveunder'), and the improved timetable came into use on 24 August 2009.