Delhi Lifts GRAP 4: Old Vehicles Return as Air Quality Improves

• CAQM immediately lifted GRAP 4 restrictions in Delhi due to improved air quality (AQI 271, "poor" category).
• The decision reverses measures implemented when AQI crossed 450, pushing air quality into "severe plus".
• Older vehicles, previously restricted from entering Delhi under GRAP Stage IV, can now return.
• GRAP Stage III rules still prohibit BS3 petrol and BS4 diesel vehicles in Delhi-NCR.
• Vehicles require a valid Pollution Under Control (PUC) certificate for refueling, addressing vehicular pollution.

Why It Matters: Delhi eases GRAP 4 curbs as air quality improves, allowing older vehicles back on roads.