Characteristics of real-world gaseous exhaust emissions from cars in heterogeneous traffic conditions

Kuppili, Sudheer Kumar, Dheeraj Alshetty, V., Diya, M., Shiva Nagendra, S.M., Ramadurai, Gitakrishnan, Ramesh, A., Gulia, Sunil, Namdeo, Anil, Maji, Kamal, Bell, Margaret, Goodman, Paul, Hayes, Enda, Barnes, Jo, Longhurst, James and De Vito, Laura (2021) Characteristics of real-world gaseous exhaust emissions from cars in heterogeneous traffic conditions. Transportation Research, Part D: Transport and Environment, 95. p. 102855. ISSN 1361-9209

TRD Kuppili et al Prepublished Manuscript.pdf - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (1MB) | Preview
Official URL:


In this study, researchers have explored real-world driving conditions and developed emission factors for 58 passenger cars using on-board emission measurement technique while driving on five different routes in Delhi. The measured average emission factors of CO, HC, and NO were 3.99, 0.34, and 0.54 g/km for diesel vehicles, 7.26, 0.17, and 0.62 for petrol vehicles respectively. Road, traffic, vehicle type, and driving characteristics affect the quantity of emissions released. However, speed and acceleration significantly impact emission rates increasing with the increase in speed and acceleration. Also, emissions were minimal at 40–60 kmph and −0.5–0.5 m/s2. The estimated city-wide CO, HC, and NO emissions were 60.8, 4.8, and 9.72tonnes/day. These results demonstrate the importance of monitoring the real-world exhaust emissions given the substantial difference between test cycle measurements used for compliance testing of new vehicles.

Item Type: Article
Uncontrolled Keywords: Real-world exhaust emissions, Portable emission monitoring system (PEMS), Passenger cars, Emission factors, Emission rate
Subjects: F900 Others in Physical Sciences
H900 Others in Engineering
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: John Coen
Date Deposited: 04 May 2021 10:03
Last Modified: 30 Apr 2022 03:30

Actions (login required)

View Item View Item


Downloads per month over past year

View more statistics