The tax on gasoline falls way short of being able to fully fund state end federal roadways.
I don't know if it falls short or the money is poorly managed the government.
CDOT is notorious for mismanagement of tax money, seems they are always getting a new fleet of vehicles or more upper management. Now they are mandated to go to zero emmision vehicles by the State. Plus the new "fee" the State added to fuel prices is solely to add infrastructure (charging stations) for EV vehicles.
