Application of Different Traffic Flow Models In Reduction of Noise In Urban Areas |
In a rapidly urbanizing country like India, transportation issues pose a majorchallenge for transportation and environmental planners. The number of vehiclesis increasing at a rate of approximately 7% per annum. Consequently the qualityof environment is fast deteriorating in metropolitan cities. At least 55% ofthe total noise is due to vehicular traffic in urban areas. In India, even thestudy is still at its nascent stage, the studies done abroad have been fairlycomprehensive in the area of traffic noise modeling. The concept of noiseprediction and abatement has been introduced long ago in developed countries. Interruptedtraffic flow in urban areas generates noise which is characteristicallydifferent from free flow traffic conditions normally occurring on highways andexpressways. This characteristic difference in traffic noise requires differentmodeling techniques from the ones used for free flow traffic conditions. Thereis a need of empirical models for stop and go traffic noise for the urbanareas. These models should be developed and evaluated on field so that they canbe reliably used. Manysuch models have been developed elsewhere and the most popular models developedso far are the FHWA (TNM) model and the CORTN model. Besides, linear modelshave also been developed for prediction of traffic noise.