Drivers are being urged to be particularly careful on the roads today, after the Gardaí issued a black-ice warning.

Dense freezing fog was causing difficulties for motorists this morning, especially in the midlands where a major crash caused a closure of the Dublin-Limerick road, according to AA Roadwatch.

A €27 million four-star hotel is to open its doors today in the new €250m City North business campus. It will create 200 jobs.