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       Sen. Rob Portman, the lead GOP negotiator on the infrastructure talks, speaks to reporters at the Capitol, in Washington, on July 28.

       J. Scott Applewhite/The Associated Press

       U.S. Senate negotiators have reached agreement on the major components of a US$1.2-trillion bipartisan infrastructure bill, clearing the way for a procedural vote on Wednesday to move toward formal debate and passage, lawmakers said.

       The agreement, which comes after months of talks between Senate Democrats and Republicans, is also backed by President Joe Biden and expected to gain strong support from lawmakers on both sides of the party aisle.

       Democratic Senator Kyrsten Sinema and Republican Senator Rob Portman, the two lead Senate negotiators, announced the agreement to reporters in the Capitol. Details on transit and broadband were still being finalized but lawmakers said legislative text would be completed soon.

       “We do expect to move forward this evening. We’re excited to have a deal,” Ms. Sinema said. “We’ve got most of the text done, so we’ll be releasing it and then we’ll update it as we get those last pieces finalized.”

       Ms. Sinema described Mr. Biden as “very excited” about the package.

       Addressing a concern over funding among Republican lawmakers including Senate Minority Leader Mitch McConnell, Mr. Portman said the package is “more than paid for” and added: “We look forward to moving ahead and having a healthy debate.”

       The procedural vote would simply limit debate on whether the Senate should begin considering a bipartisan infrastructure investment bill, thought to be in the range of US$1.2-trillion.

       The bipartisan bill, which failed a similar vote last week when major issues remained unresolved, is a key component of Mr. Biden’s larger domestic policy agenda. Democrats plan to address the remainder with a sweeping US$3.5-trillion reconciliation package that Republicans have vowed to oppose.

       The bill will propose US$550-billion in new spending, a Republican source said, down from US$579-billion in a framework the negotiators sketched out several weeks ago.

       It scraps previous plans to spend US$20-billion to create an infrastructure financing authority, sources in both parties said. It had been intended to attract investment through private-public partnerships, but Republicans opposed Democratic demands designed to lift worker wages by attaching requirements that contractors pay prevailing wages, typically higher levels secured by unions.

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       Four other Republican negotiators joined Mr. Portman, including Senator Lisa Murkowski, who said the agreement showed Republicans and Democrats in the sharply divided U.S. Congress “can come together over really hard stuff to negotiate in good faith to broker an agreement.”

       The agreement includes US$110-billion for roads, US$65-billion to expand broadband access and US$47-billion for environmental resiliency, the lawmakers said.

       Earlier, Senate Majority Leader Chuck Schumer said a procedural vote on a bipartisan bill was possible as soon as Wednesday night.

       “Senators continue to make good progress,” Mr. Schumer, a Democrat, said in a speech on the Senate floor.

       Before the announcement, Ms. Murkowski told reporters: “I think that there is a strong, solid number of folks on both sides of the aisle that want to get on to an infrastructure package.”

       Democrats hope to pass this month or early next month whatever measure is agreed upon in the bipartisan negotiations.

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