The Department for Transport says its "disappointed" that 4,000 members of staff have decided to strike today.
The PCS union says members will hold 15 minute demonstrations across Wales.
We are disappointed that the PCS union have decided to take industrial action while we are still engaged in consultation with them about their concerns over changes within the department.
Contingency plans are in place to ensure delivery of essential services to the public continues throughout the planned strike action.
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French authorities have confirmed that new Cardiff City player Emiliano Sala was on board the plane which disappeared on Monday night.
Mark Drakeford says leaving the EU with no deal would be 'catastrophic'.
The 'plane is thought to have taken off from Nantes in Brittany and was flying to Cardiff.