Experimental Investigation of Exhaust Gas Emission Status in Tanzania: A Case Study of National Institute of Transport Vehicle Inspection Center – Dar es Salaam

Author:

M. Khalfan Omari1,Nabora Christian1,L. Mgaya Prosper1

Affiliation:

1. Department of Transport Engineering and Technology, National Institute of Transport, Dar es Salaam, Tanzania

Abstract

Exhaust gas emission is a by-product of air and fuel combustion in vehicle engines. It is a crucial contributing factor to air and environmental pollution that authorities emphasize controlling to mitigate the health and environmental hazards to communities. This was an experimental investigation to ascertain the emission status of used vehicles used for transport in Tanzania, some on the verge of surpassing their allowable emission levels. An experimental research design was opted for in this study and data were collected experimentally and through observations. Gas analyzers and emission detectors were used to obtain emission data for the study, where cluster sampling was preferred and 403 gasoline and diesel-powered vehicles were investigated for general inspection. The study found that engine size, year of manufacture, and kilometers of travel affected vehicle emission levels. The results were analyzed and compared with the allowable emission values in the Tanzanian standards.

Publisher

National Institute of Transport

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