HWY16 east of Terrace is open to single-lane traffic again.
It was closed for about 12 hours, beginning last night, after a rock slide came down approximately 20km east of Terrace.
A geotechnical engineer was on scene at first light today and gave the approval to open the road again.
"He doesn't feel there is any significant risk at all for more rock coming down," said transportation ministry official, Don Ramsay.
First estimates indicated approximately 50 cubic metres of rock and material came down from a steep rockly slope overlooking the highway.
The largest piece is a boulder described as the size of the box at the back of a dump truck.
Ramsay said crews are now at work clearing the ditch to the side of Hwy 16, to provide adequate catchment in case more rocks do come down, which he adds is unlikely.
He expects both lanes of the road to be open to traffic sometime this afternoon.
Highway officials said there's a history in that area of rock coming down on the highway.