A snow storm on Tuesday caused multiple accidents, including one involving a school bus on Culver Street in Red Bank.
Some students were stranded at school because buses were having difficulty getting there.
Hamilton County Emergency Services activated the Emergency Operations Center at 3300 Amnicola Highway as of 4:30 p.m. due to the inclement weather.
Due to icy conditions the following roads have been closed to traffic: Roberts Mill Road, W Road and Shoal Creek Road on Signal Mountain.
All secondary road are treacherous with icy conditions including the on and off ramps and overpasses on Highway 27 as well as Highway 111.
Sheriff officials said, "Unless it is an emergency we urge everyone to stay home."
Traffic was especially snarled on Amnicola Highway. One motorist said he left BlueCross at 11:40 a.m. and by 3 p.m. had only gotten to Chattanooga State.
By early afternoon Chattanooga Police were no longer responding to accidents without injuries. They were telling people to call a tow truck.
A Chattanooga woman living on a steep road near the Publix in East Brainerd said nine cars had stacked up in her of her house when they were unable to climb the hill. One pickup truck tried it, but came spinning back down the road and struck a car.
One County Courthouse employee took five hours to get home from downtown to the Hurricane Creek section of East Brainerd.
An employee at a church on North Moore Road took four hours to get home near Morris Hill Road in East Brainerd.
City officials said Tuesday night, "Citizens should avoid unnecessary travel tonight and tomorrow morning. All city of Chattanooga Public Works vehicles will continue treating streets with sand and salt throughout the night. Unfortunately, salt is ineffective when temperatures dip below 15 degrees. At that point, we will sand streets and, in the early morning, be positioned to treat the major roads heading to downtown.
"That said, safe travel on secondary and tertiary roads is still expected to be difficult and avoided if possible."
Amy Maxwell of Hamilton County Emergency Services said Tuesday night, "Tonight, the Emergency Operations Center will be closing at 9 p.m. The roads continue to freeze due to the temperatures dropping and we urge citizens not to travel unless absolutely necessary.
"Road crews will continue to work throughout the night treating the roads. Road conditions will not be improving tomorrow due to continuing temperatures below freezing."