The Texas House passed a budget (https://www.dallasnews.com/news/politics/2025/04/10/texas-house-set-to-vote-on-3374b-state-budget-plan-thursday/) plan Thursday. The Senate previously passed a plan. The fiscal year starts in September. Texas does budgets for two years.
The House and Senate versions for TxDOT are nearly identical, so I think $39.9 billion is fairly firm, although the funding from the oil & gas severance tax could vary from the estimates during 2026 and 2027.
House (https://capitol.texas.gov/tlodocs/89R/billtext/pdf/SB00001H.pdf#navpanes=0)
2026: $21,174,303,979
2027 $18,724,105,535
Total: $39,898,409,514
Senate (https://capitol.texas.gov/tlodocs/89R/billtext/pdf/SB00001E.pdf#navpanes=0)
2026: $21,171,303,979
2027: $18,724,105,535
Total: $39,895,409,514
This is a 7.1% increase over the budget amount for the 2024 and 2025 fiscal years: $37,227,863,998. (I don't know the actual amount.)
Of course, construction inflation has been much higher than 7.1%, so the budget loses purchasing power. But there is hope inflation can tamed, based on preliminary indications from this month's bid amounts.
UPDATE: according to this presentation (https://www.nctcog.org/getmedia/dfab5854-2c8b-4eed-b464-18a5b6eeac8d/presentationsrtc04102025.pdf?ext=.pdf) (page 5) on the NCTCOG site, $39.9 billion is a "Net decrease of $401 million". This suggests that the actual amount for 2024-2025 is higher than the budget document amount, probably due to revenue from the oil & gas severance tax, which can fluctuate.