Abstract:Fortheproblemoftrackingvehiclesonfreewaysusingmachinevision,existingsystemsworkwellinfree-flowingtraffic.Trafficengineers,however,aremoreinterestedinmonitoringfreewayswhenthereiscongestion,andcurrentsystemsbreakdownforcongestedtrafficduetotheproblemofpartialocclusion.Weared