 Whilst the construction of the first section was in progress, the plan for Ringways 3 and 4 were modified considerably.Broadly speaking, the northern and eastern section of Ringway 3 (from the current junction 23 of the M25 motorway with the A1 east and south to the current junction 3 with the M20) was to be built and connected to the southern and western section of Ringway 4 to create the M25.The remaining parts of the two rings became redundant.