Congressional leaders have reached tentative deals that would prevent a doubling of student loan interest rates and revamp the nation’s transportation programs, congressional officials said Wednesday. If completed, the compromises would resolve two vexing issues on which lawmakers face weekend deadlines for action.

House and Senate leaders have tentatively agreed to a one-year extension of today’s 3.4 percent interest rates for subsidized Stafford loans, said a congressional Republican who spoke on condition of anonymity to reveal the issue’s status. The measure – which would affect 7.4 million students projected to get new loans starting July 1 – is the same package that Senate Majority Leader Harry Reid, D-Nev., and Senate Minority Leader Mitch McConnell, R-Ky., said Tuesday they had crafted between themselves.