A day of strike action has been suspended while the RMT considers a new and improved pay offer from Network Rail.
RMT members in Network Rail were due to strike on March 16, followed by a series of overtime bans and rest day working bans by the rail body's operation and maintenance staff.
The RMT has now suspended industrial action against Network Rail, as union members vote on the latest offer in a referendum starting on March 9 and concluding on March 20 at midday.
The new offer includes a salary increase of 14.4pc for the lowest paid and 9.2pc for the highest paid staff. There is an additional 1.1pc on basic earnings and increased backpay.
The RMT said it was not making a recommendation on how to vote on the offer, which is not conditional on accepting Network Rail's modernising maintenance agenda, which the RMT does not endorse.
However, passengers still face travel chaos over Easter as Tube drivers and rail workers across 14 train operators prepare to strike this month and April as planned.
RMT general secretary Mick Lynch said: "We will continue our campaign for a negotiated settlement on all aspects of the railway dispute."
When are the train strikes?
The suspended strike action against Network Rail has no impact on RMT's separate pay dispute with rail operating companies.
It means that passengers still face disruption as RMT members at 14 train operators prepare to stage four days of walkouts on:
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Thursday March 16
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Saturday March 18
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Thursday March 30
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Saturday April 1
The RMT says it represents around 40,000 workers across Network Rail and the 14 train operators, meaning major swathes of the train network will grind to a halt.
Which train companies will be affected?
There are 14 train companies which will be affected by the staff walkouts, and it is expected that these will be the same ones which have been hit by earlier walkouts. These are:
Chiltern Railways
Cross Country Trains
Greater Anglia,
LNER,
East Midlands Railway,
c2c,
Great Western Railway,
Northern Trains,
South Eastern
South Western Railway
Transpennine Express,
Avanti West Coast,
West Midlands Trains
GTR (including Gatwick Express)
When is the next Tube strike?
Tube drivers in the Aslef union and Tube workers in the RMT union are to go on strike on Budget day, March 15, affecting London Underground lines.
Drivers and workers are striking in a dispute over pensions and working arrangements. Tube workers last went on strike on November 10.
Test train and engineering train drivers on the London Underground also voted to walk out.
Why are rail workers going on strike?
Unions are demanding pay rises for their members who are battling soaring inflation, although train operators are limited in how much they can offer, given they require a mandate from the Government.