I pulled some numbers and I get $239 for the average car and average use based on [1], [2], [3]. Using the same numbers the Federal part would be an additional $79. Do you have different numbers for Washington state? Like, do people drive less than 10,952 / year or have more efficient gas vehicles?

[1] WA gas tax $0.554 (Federal gas tax is an additional $0.184. California is $0.7092.) https://en.wikipedia.org/wiki/Fuel_taxes_in_the_United_State...

[2] Average fuel efficiency 25.4 mpg. https://gocarlife.com/average-gas-mileage-for-a-car/

[3] 10,952 average passenger + light duty miles driven per year. https://truedrivingcost.com/articles/how-many-miles-american...