Although the first half of October has been warmer than usual, it's the time of year that drivers should be extra careful about black ice on the roads.A well-known hazard on Haida Gwaii, black ice is almost invisible, and can cause vehicles to suddenly lose traction. It forms first in shady areas and on bridges, which are often colder than unshaded parts of the road, but will form anywhere once the surface temperature of the road dips below freezing.Black ice can be present on the road even when the air temperature is above freezing. Take care and take your time driving during the colder months.