Pennsylvania has more structurally deficient bridges than any other state - more than 5,000.
But Corbett reduced transportation funding by about 9 percent in the budget he proposed Tuesday: $5.86 billion, down from $6.43 billion this year.
"It is critical that we address our transportation issues," Corbett said in his budget address. "This is not a budget item. It is too large for that.
"Transportation must be confronted as its own distinct and separate topic."
He did not say what solutions he favored to pay to rebuild the state's crumbling bridges and highways and transit properties.
"There is less money to work with," said PennDot spokesman Dennis Buterbaugh. "We're not going to let a bridge fall down or be unsafe...but we will have to shift more money from paving and expansion to maintain bridges."
The cuts in transportation also mean less funding for mass transit.
SEPTA will get about $300 million for its capital budget to pay for such things as new vehicles and station improvements. That is the same as this year and down 25 percent from three years ago.
SEPTA will once again put off construction projects, such as the renovation of the City Hall subway concourse, for lack of money.
"Funding constraints are threatening SEPTA's ability to serve its growing customer base," the agency said in a statement Tuesday. "More than $600 million in critical upgrades, from bridge repairs to overhauls of aging electrical substations and renovations of outdated facilities...have been deferred indefinitely."
Contact staff writer Paul Nussbaum at 215-854-4587 or pnussbaum@phillynews.com