A Tube strike planned by signal workers on New Year's Eve has been called off following a deal over pay and hours.
Piccadilly Line drivers staged a walkout on Friday
Members of the Rail Maritime and Transport (RMT) union voted on Thursday to back industrial action.
But on Friday, union leaders reached an agreement with London Underground (LU) management.
A strike planned for 4 January has also been called off. A walkout by Piccadilly Line drivers on Friday meant just 50% of services were running.
The strikes would have caused travel chaos for millions of New Year revellers and people returning to work after the festive break.
The RMT said it would recommend acceptance of the deal in a ballot of its 330 members.
It also said the agreement had removed the threat of job losses, longer shifts and shorter rest breaks.
Under the agreement the lowest grade signal worker will be paid £31,500 while the top grade will receive £44,000.
Bob Crow, the union's general secretary, said: "This is a fantastic deal which puts our members at the top of the industry pay league in Britain."
Mike Brown, LU's chief operating officer, said: "I'm pleased that negotiations have resulted in reaching an agreement with the trade unions and that the RMT are suspending strikes which will enable Londoners to enjoy the New Year celebrations."
On Friday, members of union Aslef staged a 24-hour walkout on the Piccadilly Line over the demotion of a colleague who went through four red lights.
Extra bus services were laid on but some disruption was reported with trains to Heathrow Airport running just every eight minutes.