Delhi plans to prohibit entry of vehicles not meeting BS6 emission standards in NCR from November 2026. Over 10 lakh vehicles in Gurgaon, Faridabad, Noida, Greater Noida, and Ghaziabad may be affected. Gurgaon and Faridabad hold around 2 lakh vehicles below BS6 standards, mostly consisting of BS3 and BS4 categories. Additionally, approximately 50,000 commercial vehicles in both locations do not comply with the new regulations.