ASSESSMENT OF CARBON MONOXIDE LEVELS AT SELECTED TRAFFIC INTERSECTIONS IN URBAN AREA OF BANGALORE

摘要

An assessment of CO level in the ambient air at 12 major traffic intersections in Bangalore city has been assessed from June to December 2001 using video-technique. Two wheeler vehicles were predominant and amounted to about 50% of total traffic flow and auto-rickshaws and cars/jeeps/vans account 50% of total traffic flows at the study intersections. In contrast the percentage share of buses in the total traffic stream ranged from 5 to 16%. The 8-hour average CO concentration levels were exceeding the standard permissible limit of 2.0 mg/m~3 prescribed by CPCB at all the study intersections. The multiple regression analysis results of the relationship between the average CO concentration and the number of two-wheelers, vehicle speed and wind speed gave an r~2 value of 0.709.