The Met Office said ice would be a "hazard" on Saturday morning and likely to cause travel disruption.
Snow has also been falling across parts of Wales. It follows a yellow "be aware" warning for wind around Wales which was issued on Friday.
On Tuesday, Storm Barney left more than 7,500 homes and business across the country without power.
A warning to commuters about "difficult driving conditions" due to ice on the roads has passed.