Severe weather is making driving difficult across the Maritimes this weekend, with freezing rain icing up New Brunswick and P.E.I. while Nova Scotia braces for heavy rainfall. 

New Brunswick RCMP closed the TransCanada Highway between Exit 303 and Exit 347 for more than an hour Saturday due to icy conditions.

The City of Moncton also warned citizens not to travel as flash freezes make conditions dangerous. The freezing rain is also making it difficult for people evacuated after the Plaster Rock derailment to get home. 

RCMP in Queens County and West Prince, P.E.I., also warned that freezing rain is making roads very dangerous and advised drivers to stay off the roads. 

Most of Nova Scotia is under a severe rain warning, with 30 to 60 milimetres expected overnight Saturday. 

Drivers stuck on New Brunswick's TransCanada Highway reported the road was like an ice rink. Traffic was at a standstill on one section between Fredericton and Moncton for more than an hour in the afternoon. 

New Brunswick RCMP said road conditions are "extremely poor" in many areas and urge drivers to stay off the roads. Those who have to drive should do so with caution.

Two ambulances crashed in New Brunswick because of the slippery roads. One rolled over near Sussex and a second slid off the road and into the median near Fredericton. No one was hurt in either accident.  

Flash freezing

Gilbert Farris, chief of the Jemseg Fire Department, said New Brunswick RCMP closed the TransCanada because of black ice. 

"They won't be going until, probably another two hours," he said at 1:30 p.m. He said motorists stuck on the road should stay put. 

"Anything moving could get into an accident and it's just more calls, and we can't get to everybody," he said. 

Some motorists are turning around on the highway. He said it was "inadvisable" and drivers could face a fine if they cause an accident.

He spoke to the CBC's Stephanie Domet, who was one of the motorists stuck on the highway.