Two Texas constitutional amendments—propositions 1 and 7—have added billions to the State Highway Fund since fiscal year 2017, according to the Texas Department of Transportation. The SHF funds construction, maintenance and right of way acquisition for road projects, TxDOT Information Specialist Adam Hammons said.

Proposition 1, which passed in 2014, divides a portion of oil and natural gas production taxes evenly between the SHF and the Economic Stability Fund, also known as the Rainy Day Fund.

In addition, Proposition 7 passed in 2015 and requires the state comptroller to deposit $2.5 billion of the net revenue from sales and use taxes into the SHF.

Including unofficial FY 2019 totals, the two propositions have contributed about $7.8 billion to the SHF since 2017 and are expected to add almost $9 billion in FY 2020-21.

“Prop. 1 and Prop. 7 have helped us maintain the funding levels and build new and safer roads,” Hammons said.