State transportation leaders applauded House Democrats for releasing principles of a broad infrastructure package last week, but were concerned about potential changes to the formula programs that determine funding levels for each state.

Although there is some concern that the broad scope of the Democrats’ $760 billion legislative “framework” could hurt chances of passage, state leaders also applauded the ambition. In addition to reauthorizing federal highways and transit programs, the plan would also change how harbors and airports are funded, boost spending on broadband access and charging stations for electric vehicles, and seek to make all forms of transportation carbon-neutral.

The larger concern is over tweaks to formulas states say work fairly well. The Democrats’ plan — released last week by Transportation and Infrastructure Chairman Peter A. DeFazio of Oregon, Energy and Commerce Chairman Frank Pallone Jr. of New Jersey and Ways and Means Chairman Richard E. Neal of Massachusetts — includes a section saying they would amend “core highway formula programs to prioritize investments and improve program implementation.”

The changes would incentivize maintenance over new construction and reward states that build in climate change resiliency, reduce pollution and offer other “performance-based incentives.”

Most state officials would rather see fewer changes to how the programs work and more money poured in. The Democratic proposal, which calls for $329 billion over five years for highways, provides “a scale where we can make some progress,” said Patrick McKenna, the director of the Missouri Department of Transportation and president of the American Association of State Highway and Transportation Officials.