As the problem of urban traffic congestion spreads,there is a pressing need for theintroductionofadvancedtechnologyandequipmenttoimprovethe trafficcontrolsystems.Trafficproblemsnowadaysareincreasingbecauseof the growing number of vehicles and the limited resources provided bycurrent infrastructures. Thesimplestwayforcontrollingatrafficlightusestimerforeachphase. Another way is to use electronic sensors in order to detect vehicles, and produce signal that cycles. We propose a system for controlling the traffic light by imageprocessing. Thesystemwilldetectvehiclesthroughimagesinsteadofusingelectronic sensors embedded in the pavement, A camera is to be used alongside the trafficlightwhichwillcaptureimagesequences,Settingimageofanempty road as reference image, the captured images are sequentially matched using image matching,For this purpose edge detection has been carried out using Prewitt edge detection operator and according to percentage of matching traffic light durations can be Controlled.