An OPP cruiser shown on October 17, 2014.

A man has life-threatening injuries following a two-vehicle collision that shut down a highway for roughly nine hours.

First responders were called to the Hwy. 6 scene north of Unity Road in Caledonia around 7:30 a.m. on Saturday.

A 23-year-old male was extricated from a vehicle and transported out of town with serious injuries.

OPP say their investigation thus far has determined a SUV travelling northbound on Hwy. 6 travelled into the southbound lanes and struck the male driver in his sedan.

"There were car parts everywhere littered on the highway," said a Caledonia resident who lives nearby. "The two cars were completely totalled. From the front end you wouldn't be able to tell what they were."

A 40-year-old woman was taken to hospital from the scene with non-life-threatening injuries.

The highway was closed between Unity and Haldibrook Roads for roughly nine hours as emergency crews stayed on scene.

Charges for the collision are pending.

While the incident is still under investigation, OPP plan to crack down on distracted and dangerous driving for the rest of the long weekend.

"No phone call or text is worth your life or anyone elses," said LeClair.

Weather is not beleieved to be a factor in the collision.