Predictive Ability of Improved Neural Network Models to Simulate Pollutant Dispersion

Table 2

Vehicular data in Dhaka in 2004.

Vehicle emission			Emission factors			Number of vehicles on the road
Emission categories	% of total emission		Emission categories	Emission factors gram/km		Vehicle type	Number
	CO	PM10		CO	PM10
Cars	66.5	7.9	Gasoline vehicle	25	0.1	Motor car	81703
Taxis-CNG	2.8	0.5	CNG taxis	5	0.03	Jeep/station wagon/microbus	30581
3-wheel taxis-CNG	3.8	0.7	CNG auto-rickshaws	5	0.03	Taxi	4389
LD diesel	3.9	18.6	Diesel vehicles	5	0.80	Bus	2140
Buses	8.2	38.9	Buses	10	1.60	Minibus	6409
Trucks	5.9	28.1	Trucks	10	1.60	Truck	18214
Motorcycles	8.9	5.3	Motorcycles	5	0.10	Auto-rickshaw/tempo	29120
Total	100	100				Motor cycle	112060
Emission (%): diesel and nondiesel vehicles
Diesel	18	82.4	Total CO emissions from vehicles in 2004 = 71,793 tons; Total PM10 emissions from vehicles in 2004 = 2412 tons
Nondiesel	82	17.6