Trams in Sheffield are still running this morning but are delayed because of the snow, slow traffic and freezing conditions.
Stagecoach Supertram bosses have warned passengers to expect delays and late notice alterations to services.
A spokesman said: "Unfortunately we are experiencing disruption this morning due to adverse weather conditions.
"Please allow extra journey time where possible.
"Traffic is very slow moving in places, particularly between Spring Lane and Birley Lane."