Workers on South Western Railway have voted to continue taking strike action in the long-running dispute over guards on trains.
Members of the Rail, Maritime and Transport union backed more walkouts by 416, with just 88 voting against.
A bigger majority also voted to take other forms of industrial action.
It was the sixth time the union has balloted its members on SWR over the issue because of industrial action legislation.
The turnout was 59 per cent, well above the legal threshold for industrial action ballots.
The union has held dozens of strikes over the past two years.
The 27 walkouts in December and on New Year's Day caused travel misery for passengers across the UK during the festive period.