Delhi AQI GRAP 4 Restrictions: What is Banned, Allowed, and Key Rules Explained

Published on: 11th Nov 2026

As toxic smog blankets the National Capital Region (NCR), the Commission for Air Quality Management (CAQM) has invoked Stage 4 of the Graded Response Action Plan (GRAP) across Delhi and surrounding areas. Triggered after the region's Air Quality Index (AQI) plunged into the dangerous 'Severe+' category (crossing 450), GRAP 4 represents the final and most extreme emergency response tier. These mandatory emergency measures aim to halt further deterioration of public health and curb hazardous emissions. If you live, work, or travel in Delhi-NCR, understanding these stringent rules is crucial for navigating daily routines safely and legally. Scroll down to read more

Understanding GRAP Stage 4: What Triggers the Emergency Alert?

The Graded Response Action Plan (GRAP) is an emergency pollution control protocol categorized into four distinct stages based on AQI severity. Stage 4 is invoked exclusively when the AQI exceeds the 450-mark (Severe+ category). At this emergency stage, atmospheric conditions prevent air pollutants from dispersing, posing acute health risks to healthy individuals and severe complications for vulnerable groups. The current enforcement combines restrictions from Stages 1, 2, and 3 along with binding, emergency-level mandates focused on heavy transport, industrial operations, and mobility.

Key Vehicle Restrictions and Bans Under GRAP 4

Transportation contributes significantly to Delhi's ambient pollution. Under Stage 4, strict transport restrictions come into effect immediately:

• Truck Entry Ban: Non-essential medium and heavy goods vehicles (HGVs) powered by diesel are prohibited from entering Delhi. Exceptions apply only to trucks carrying essential commodities or providing emergency services.
• Light Commercial Vehicles (LCVs): LCVs registered outside Delhi (except electric, CNG, or BS-VI diesel vehicles) are barred from entering the capital.
• Ban on Diesel Passenger Vehicles: A complete ban is imposed on the plying of Delhi-registered BS-IV and older diesel-operated Medium and Heavy Goods Vehicles.
• Possibility of Odd-Even Scheme: State authorities retain the discretion to enforce the odd-even car rationing scheme for private light motor vehicles (LMVs) if air quality worsens further.

Construction Bans, Schools, and Work-From-Home Mandates

To control dust and human exposure during hazardous air quality episodes, government authorities enforce widespread administrative restrictions:

• Complete Shutdown on Construction: All construction and demolition (C&D) activities are halted. This includes linear public projects like highways, roads, flyovers, power transmission pipelines, and telecommunication infrastructure.
• School Closures and Virtual Classes: Physical classes for primary and secondary school students are suspended, transitioning temporarily to online learning modes to protect children from extreme smog exposure.
• Government and Private Office Operations: State and central governments may allow 50% physical attendance in public offices, with the remainder working from home. Private offices are strongly advised to adopt work-from-home policies for their workforce.

Essential Health Guidelines for Residents

With hazardous air quality posing immediate respiratory and cardiovascular risks, health experts advise residents to adhere to strict self-care guidelines:

• Wear high-grade N95 or N99 particulate respirators whenever stepping outdoors.
• Avoid early morning outdoor physical activities, including jogging, cycling, and intense exercise.
• Use indoor HEPA air purifiers to maintain clean air inside living spaces, especially for children and the elderly.
• Rely on public transportation networks, such as the Delhi Metro, to minimize personal vehicular emissions.

The implementation of Delhi AQI GRAP 4 restrictions underscores the severity of the air quality crisis gripping the capital region. While regulatory authorities and law enforcement agencies work to strictly implement these emergency measures, collective citizen compliance is vital. Staying informed about transport rules, shifting to remote work where possible, and taking proactive health precautions will help protect individuals and families until atmospheric conditions improve.