Schools delayed for possible black ice

Roads stayed mostly wet and ice-free in the Triangle as temperatures remained above freezing.

Northern counties, though, saw sub-freezing temperatures overnight. That allows any free-standing water left on roads to freeze. Icy patches are mostly likely to form on bridges and overpasses.

"The farther north you go, up along the North Carolina-Virginia border – places like Roxboro, Henderson, maybe Roanoke Rapids – you might run into some icy spots out there," WRAL traffic reporter Brian Shrader said.

Secondary roads and less-traveled rural roads are areas where drivers should look out for icy patches, he said.

Some wrecks occurred when vehicles slid into ditches along Oxford Road and U.S. Highway 158 Friday morning, Person County dispatchers said. That same area was a trouble spot for wrecks overnight as well.

Authorities have reported no major wrecks on roads in the Triangle or northern counties Friday morning.

Concerns about ice on neighborhood streets where school buses would travel prompted school administrators to call it a snow day in some counties.

School districts in Vance, Granville, Warren and Franklin counties are closed Friday.

Most school systems, including those in Wake, Orange, Durham, Chatham, Johnston, Nash and Edgecombe counties were on a two-hour delay Friday. 

More than 300 schools and businesses have closed or delayed opening for Friday.