for pnt_id in UNIQUE_POINT_IDS:
    for export_lyr in arcpy.mapping.ListLayers(MXD, '', DF):
        if pnt_id in export_lyr.name and 'traffic' in export_lyr.name:
            arcpy.SelectLayerByAttribute_management(export_lyr, "NEW_SELECTION", '"ToBreak"=10')
            print 'zooming to map extent for', pnt_id, '...'
            DF.zoomToSelectedFeatures()
            print 'clearing selected features before map export...'
            arcpy.SelectLayerByAttribute_management(export_lyr, "CLEAR_SELECTION")
            arcpy.RefreshActiveView()
            MXD.save()
            PNG_PATH = os.path.join(r'D:tempautosample_data_20160916',
                                    export_lyr.name + '.png')
            print 'exporting', export_lyr.name, 'to PNG...'
            arcpy.mapping.ExportToPNG(MXD, PNG_PATH)