The Big Freeze: travel information and useful contacts
Stay on top of the main developments as the big freeze continues to cause travel disruption for commuters across the country.
Freezing fog hung over Limerick yesterday with temperatures kept well below zero degrees.
While most parts of north Tipperary avoided snow over the last 24 hours, motorists were urged to drive with caution in the region. Some roads in north and west Clare are said to be treacherous.
Due to the low temperatures throughout Co Mayo overnight, the salting of some primary road routes did not prove as effective as it should have.
"Some roads were still slippery despite an allocation of extra salt," Mayo county secretary John Condon said.
Salt was only effective in temperatures as low as -8C, Mr Condon said, but overnight temperatures in the region had gone as low as -16C.
Severe freezing temperatures in the north west has caused hazardous driving conditions for motorists.
Drivers have to contend with icy conditions around Navan, Slane and Ashbourne. Compact snow around Dundalk and Drogheda continues to cause problems.
Packed snow on all routes in Carrickmacross has been reported, particularly on the Carrickmacross to Kingscourt road. Motorists are warned of patches of ice at Virginia.
Conditions are hazardous on the M7, particularly between Portlaoise and Naas, and poor conditions on the Lanesborough to Roscommon road.
Compacted snow on the N11 Stillorgan road between Donnybrook and Foxrock is making driving difficult.
Dangerous conditions persist on Nutley Lane, Newtownpark Avenue and Kill Lane.
In Blackrock, icy conditions on Rock Road at Booterstown Avenue and on to Frascati Road, Stradbrook Road and Temple Hill are treacherous.
Hermitage Hill in Lucan is also dangerous and conditions are extremely poor in Bray Town, Rahdown and Laragh.
The Christmas rush will start this afternoon. You are advised to travel in daylight, do a check on your car battery and tyres well in advance, especially if you have not driven in a few days, allow at least an hour extra for all long journeys.
If you are headed to a snow affected rural area, pack a shovel in case you get stuck, warm coat and boots
Most county councils have put maps of the roads to be gritted on their websites, and have advised motorists to use these roads if possible.
Intercity, DART and Commuter services are operating this with some delays expected in badly affected areas as points are cleared of snow and ice.
Commuters are advised to allow extra travel time to arrive at stations due to poor road and footpath conditions.
Bus Éireann: The majority of services are operating as per normal with some delays and diversions in affected areas.
Bus Éireann have said they will will seek to maintain as many services as possible over the coming days subject to road and weather conditions.
Passengers are asked to visit the Bus Eireann website or contact their local travel centre for latest information on service changes
Dublin Bus: Dublin Bus services are operating with a number of curtailments and diversions in place.
Roads across the capital are very icy, Dublin Bus will contiunue to monitor the situation throughout the day. Passengers can keep up to date with the latest developments and changes to services via the Dublin Bus website.
Dublin Airport: Dublin Airport is operational again after being forced to close due to fresh snowfall this morning.
Passengers intending to travel from Dublin Airport are strongly advised to consult their airline or airline's website BEFORE going to the airport.
Cork Airport: Shannon Airport is open passengers are advised to check with the airport's website for information on delays and cancellations.
Shannon Airport: Shannon Airport is open, passengers are advised to check with the airport's website for information on delays and cancellations.
Ireland West Airport: Ireland West is open, passengers are advised to check with the airport's website for information on delays and cancellations.
Irish Ferries: All Irish Ferries sailings are expected to sail to schedule. For information contact: Irish Ferries Central Reservations (Ireland) 0818 300 400.
Stena Line: All Stena Line sailings are expected to sail to schedule. For information call 01 204 77 99 when travelling to Britain or +44 (0) 8705 755 755 when travelling to Scotland.
Celtic Link Ferries: All Celtic Link sailings are expected to sail to schedule. For information call 53 9162688.
County council winter gritting routes