All Dublin Bus services are to cease from 8pm this evening due to the inclement weather.
"Due to the deteriorating conditions and in the interest of safety last departures outbound and inbound will leave at 20:00hrs on all services," the company said in a statement posted on its website.
"Dublin Bus would encourage all customers to travel as early as possible."
Both DART and Luas will honour Dublin Bus Tickets after 8pm. In addition, there're a number of areas where conditions are very poor and curtailments are in place on services currently operating.
Customers are advised to check www.dublinbus.ie for details of individual services affected or to call the company's customer service line from 7am to 7pm on 01-8734222.
"Dublin Bus apologises for any inconvenience caused," the company said.
Bus Éireann is also warning that its services will be significantly affected by the weather this evening , particularly those that run through Dublin city centre.
Meanwhile the capital's Deputy Lord Mayor Kevin Humphreys had urged extreme caution on roads and paths tonight as Dublin City Council only has a limited amount of salt left.
Another shipment 200 tonnes of salt is due tomorrow, according to Humphreys.
Met Eireann is forecasting snow for the west and northwest tonight, with temperatures set to plummet to minus 10 in sheltered areas.
Fine Gael has called on the Government to bring in the army to help clear the roads of ice.
The party also wants the authorities to use grit from quarries and sand from beaches to help make the footpaths passable.
The party's road safety spokesperson Shane McEntee said not enough is being done to make the streets safe for motorists and pedestrians.