The Department for Transport underspent on its budget by more than £1 billion last year, according to MPs.
The House of Commons Transport Committee said the department underspent on infrastructure, including theroads network, by £1.029 billion.
Of the leftover money, £486 million was recycled into transport schemes and £543 million was surrendered to the Treasury.
This came after the department took a £683 million budget cut, the Committee said.
Its report said: "The DfT accepted a cut to its in-year budget of £683 million and then underspent on its revised budget by over £1 billion, calling into question whether the in-year cut (of £683 million) was necessary."
Meanwhile, the Committee said the department's spending was "unduly focused" on London and the South East.
Committee chair Louise Ellman said: "Although we welcome the additional investment in road and rail infrastructure projects announced in the Autumn Statement, there is still concern that the regions are not as well provided for as London and the South East."
Copyright Press Association 2012