Gas tax graph longdesc
This graph compares the revenue that is generated per mile based on vehicle fuel efficiency. Currently, the gas tax generates approximately 2.4 cents in revenue per mile if you drive a vehicle with average fuel efficiency in Washington state and travel on average 10,000 miles a year.
Conservative forecasts say Washington’s vehicles will reach a thirty five miles per gallon average by the year 2035, up from the current average of 20.5 miles per gallon. This increase in fuel efficiency will result in a forty five percent decline in gas tax revenue per mile driven. As vehicle fuel efficiency increases, gas consumption decreases. Thus, gas tax revenue decreases as well.