The dollar rose to a three-month high against its major peers after Federal Reserve Chair Janet Yellen reiterated the U.S. is on track to raise interest rates this year. The U.S. currency advanced to the strongest in six weeks versus the euro after the Greek parliament voted to accept further austerity required for a new bailout, clearing one obstacle to higher U.S. borrowing costs. The Aussie dropped for a second day with its Canadian peer after the Bank of Canada cut rates.