New Delhi
MoRTH Updates Motor Vehicle Rules on Width Measurement and Mandatory Safety Systems for Heavy and Medium Vehicles
The Ministry of Road Transport and Highways has revised regulations regarding vehicle width and safety technology requirements, as outlined in a recent Gazette notification. Notably, specific external components, such as mirrors and sensors, will not be included in the width measurements of motor vehicles. Additionally, heavy vehicles must now feature mandatory stability and braking systems by set deadlines for both new and existing models. New safety technologies, including lane departure warnings and driver-assistance systems, will also be required by 2028, enhancing overall vehicle safety.
Keshav Rajput
Updated Nov 28, 2025, 03:23 PM IST
MoRTH Updates Motor Vehicle Rules on Width Measurement and Mandatory Safety Systems for Heavy and Medium Vehicles
The Ministry of Road Transport and Highways (MoRTH) has issued amendments to its previous notification from November 11, 2025. According to the revised text published in the Gazette on 21 November 2025, the earlier provisions on vehicle width and safety technology requirements have been substituted with updated rules.
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Revised Guidelines for Measuring Vehicle Width
The notification states that certain external components should not be counted when measuring the overall width of a motor vehicle. These include:
- Rear-view mirrors
- Devices used for indirect vision
- Guard rails
- Direction indicators
- Rubber beading with a maximum thickness of 20 mm on each side
- Side foot steps
- Sensors and casings used for advanced driver assistance functions such as Blind Spot Information Systems and Moving Off Information Systems
The notification specifies that these components must still remain within any size limits defined under the relevant standards.
Mandatory Stability and Braking Systems for Heavy Vehicles
Vehicles in these M2, M3, N2 and N3 categories must now be equipped with:
- Vehicle Stability Function
- Advanced Emergency Braking System (AEBS)
The compliance schedule is divided into two stages:
- From 1 January 2027 for newly introduced models
- From 1 October 2027 for all existing models
Additional Safety Technologies and Compliance Dates
The amended rules also introduce mandatory Lane Departure Warning Systems (LDWS) for categories M2, M3, N2 and N3 from 1 October 2027 for new models and 1 January 2028 for existing models.
A new rule establishes requirements for driver-assistance technologies such as Driver Drowsiness and Attention Warning, Blind Spot Information and Moving-Off Information Systems. These systems must be installed in M2, M3, N2 and N3 category vehicles from 1 October 2027 for new models and from 1 January 2028 for existing models.\
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