 Whilst the construction of the first section was in progress, the plan for Ringways 3 and 4 was modified considerably.Broadly speaking, the motorway section of Ringway 4 was to be built and connected to the northern and eastern section of Ringway 3 (from the current M25 junction 23 with the A1 clockwise to the current junction 3 with the M20).Two additional sections of motorway were added to the plan to join the two original sections and the remaining parts of the two rings were cancelled.