Opposition leader Michael Daley has gone on the offensive over infrastructure, attacking the Liberal government's "botched" light rail project, as NSW prepares to go to the polls on Saturday.

Mr Daley tried to refocus the attention  after a poor debate performance against Liberal leader Gladys Berejiklian on Wednesday evening where he struggled to recall costings of his key policies. He chalked up the memory lapse blunders up to "the pressure of debate".