The outlook for Northern Ireland was for the cold conditions to continue, with the weather turning drier and brighter mid-week.
The Met Office said it was safer not to drive in icy conditions, but recommends a number of precautions that drivers should take it if is necessary:
Looking well ahead for potential hazards and keep your speed down
Accelerating, braking, steering and changing gear as smoothly as possible to reduce the risk of a skid
Using a higher gear may be more appropriate to help grip on packed ice
Using a higher gear helps manage engine power making it easier to find traction
Cyclists have also been urged to stick to main roads, which are more likely to have been treated, and for all road users to leave more time to complete their journey.
NI Water has reminded the public to be aware of the risk of frozen pipes, as they pose a risk to properties and possessions.
Advice includes wrapping your pipes and water tanks up, fixing dripping taps, knowing how to turn off your property’s stop tap, checking your central heating boiler has been serviced and leaving the heating on low if you are going away.