Moderating temperatures in the region mean the melting of recently fallen snow. However, cold temperatures at night cause the runoff to quickly re-freeze.

Area emergency services officials say ramps and bridges as well as some intersections are particular trouble spots.

There have also been several reports of pedestrians slipping on sidewalks that had been cleared following the latest snow, but have icy spots that seem to suddenly appear in a matter of hours.  Health officials say walkers should be particularly wary at night when they may find it more difficult to see the ice on walkways.