I have a layer called "streets". It has an attribute called "traveled". The values are either "yes" or "no". If the value is "no", I would like to display those streets in a different color (than the ones with "yes" as the value).
Also this "streets" layer has an attribute called "miles". If the "traveled" attribute is "yes", I would like to retrieve the total "miles" from the "traveled" streets only.