A recent study conducted as part of The Real Urban Emissions (TRUE) Initiative has shed light on the alarming disparity between vehicle emissions recorded in laboratory tests and those emitted on the road. The study, carried out in collaboration with authorities in Delhi and Gurugram, utilized remote sensing technology to measure real-world emissions from vehicles. The findings, analyzed by the International Council on Clean Transportation (ICCT), revealed that nitrogen oxide (NOx) emissions from BS-VI private cars are 81 percent lower than those from BS-IV cars. Similarly, BS-VI buses were found to produce 95 percent less NOx compared to their BS-IV counterparts.
One of the most surprising revelations from the study was the high levels of NOx emissions from vehicles powered by Compressed Natural Gas (CNG). Despite being considered a cleaner alternative to traditional fuels, CNG vehicles were found to emit significant amounts of NOx. For example, Class II light goods vehicles were found to exceed their NOx limits by up to 14.2 times in lab tests, while taxis emitted four times the permitted amount. These findings challenge the perception of CNG as a ‘clean’ fuel and underscore the importance of measuring actual emissions from vehicles on the road to improve air quality.
Commercial vehicles, such as taxis and light goods vehicles, were identified as the biggest culprits when it comes to NOx emissions, even when they meet the same emission standards as private cars. This highlights the need for stricter regulations and enforcement measures to curb emissions from these high-polluting vehicles.
The release of this report comes at a crucial time, as the Supreme Court has recently directed the finalization of the Automotive Industry Standard (AIS) 170 and the implementation of remote sensing technology in the National Capital Region. AIS 170 will establish the technical parameters for remote sensing devices, allowing authorities to monitor vehicle emissions in real time. This move is expected to play a significant role in improving air quality and reducing pollution levels in urban areas.
In conclusion, the study’s findings emphasize the importance of rethinking our approach to vehicle emissions and air quality management. By focusing on real-world emissions from vehicles on the road, rather than relying solely on laboratory tests, we can better understand the environmental impact of different vehicle types and fuels. This, in turn, will enable policymakers to implement more effective measures to reduce pollution and protect public health.