UPDATE: Highway reopened after truck crash.
UPDATE 3:45PM: The Bruce Highway at Machine Creek has now re-opened to traffic in both directions.
THE BRUCE Highway north of Mount Larcom is currently blocked due to a truck crash.
At 1.05pm, police were called to the scene six kilometres north of the township where they found a semi-trailer to have jackknifed.
The driver was not injured in the crash.
Police have advised people travelling on the road to expect delays.
More to come.