So what about the gas tax? Last year the state collected $3.5 billion in gas tax.
“Some people feel the gas tax should pay for our roads," said Chuck DeVore with Texas Public Policy Foundation, a non-profit watchdog group.
A good chunk of the gax tax doesn't go to roads.
“A billion dollars goes off to general revenue to fund the schools,” said DeVore.
Every time you fill up your tank, 38 cents per gallon is a gas tax. Eighteen cents goes to the federal government. Twenty cents stays in Texas.
Here's how the 20 cents collected on each gallon of gas breaks down: Five cents goes to schools while 15 cents goes to the state highway fund. But the state highway fund is used for a variety of other purposes other than funding the Texas Department of Transportation. It funds thing such as raises for state employees and employee benefits.
"I don't think that's where it should be going," said Fitzgerald.
Experts said the gas tax alone would not be able to pay for all the road construction Texas needs.
“The challenge is that cars are becoming more energy efficient,” said DeVore.
More electric and alternative fuel vehicles means less money from the gas tax. And the rates haven't changed in more than 20 years.
“It hasn't been raised since the 1990s,” said DeVore.
Yet the cost of construction on roads and bridges has skyrocketed more than 83 percent.
“You're getting more energy alternative vehicles so you would really have to jack up the fuel tax in Texas so as to make it pay for the roads,” said DeVore.