Supreme Court Mandates BS-4 Compliant Engines for Delhi Vehicles to Combat Air Pollution

Dec 17, 2025 09:03 pm CST

The Supreme Court has modified its order on vehicle restrictions in Delhi, now requiring BS-4 compliant engines or newer to operate in the capital. This decision targets older vehicles with BS-III engines that emit significantly higher pollutants, as data shows they contribute substantially to Delhi's severe air pollution. New initiatives including PUCC enforcement and traffic system improvements are being implemented to address the city's deteriorating air quality.