Abstract:
Among other limitation/shortcomings, environmental problem in Dhaka
city occur due to the lack of favorable facilities, such as, infrastructure of
road network, insufficient traffic management, relaxation of traffic rules,
coupled with the rapid risein transportation demand. Air quality monitoring
data is very limited in Dhaka city. Bangladesh notified the first emission
standard under the environment conservation rules in 1997, but the
standards are incomplete, have some inherent limitations and more
importantly it has lack of strategies for proper implementations. In Dhaka,
there are no facilities for measurement of emissionsfrom in-service or onroad
vehicles.
In the present study, simulated on-board measurement has been carried
out on six vehicles. The test was executed at the center of Dhaka city
under various traffic conditions. All the vehicles comprising gasoline engine
were measured for both fuel consumption and emission. The main
emphasis was put on driving in the peak hours (morning and evening) and
off-peak (noon) traffic conditions. Theprincipal aim isto obtain realistic fuel
consumption and exhaust emission data for Dhaka city. Secondly, to
establish the relationship between consumption and emissions under
various traffic conditions. The collected data may be fed into a simulation
model that would evaluate traffic management concepts to reducing fuel
consumption and emissionlevels of cars.
