New Delhi: The proposal to develop four new greenfield cities along Rapid Rail Transit System (RRTS) corridors by the National Capital Region Planning Board (NCRPB) will bring the much-needed affordability factor in the real estate sector of Delhi and surrounding areas, industry experts said.The plan designates the KMP-Eastern Peripheral Expressway belt as NCR's Ring of Opportunity, mandating a formal notification of all non-notified land pockets within the Circular Regional Expressway-1 (CRE-I) boundary.This ends decades of regulatory limbo for peripheral land sitting between Delhi, Haryana, and Uttar Pradesh jurisdictions, giving it a defined FAR (floor area ratio) and use-permission pathway for the first time, experts said."NCR is projected to absorb an additional population larger than Spain's between now and 2041 - a scale of demographic pressure that demands a fundamentally different planning response," said Ankita Sood, national director - research at Knight Frank India. "What sets this plan apart is the quantum of physical infrastructure already committed - the operational Delhi-Meerut RRTS, the KMP corridor running from Kundli to Palwal, and the Noida International Airport (Jewar) - which gives this plan more real-world anchors than its predecessors had," she said.For the first time, Sonipat, Bhiwadi, Meerut and Alwar are being planned as deliberate growth destinations and not peripheral towns connected to Delhi through transit rather than dependent on it.