Highway Users Tax Fund

The oil industry was predicting motorist outrage and an increase in gas prices of around 70-cents due to the carbon charge effective in the state on January 1. Some prices increased 10-cents, but went largely unnoticed.
Jan 6, 2015   San Diego Union-Tribune
For the first time, a new law allows Colorado's cities and counties to spend revenue raised by the state's fuel sales taxes and license plate fees on projects other than roads and bridges.
May 6, 2013   The Denver Post