article_snippet: The incident occurred around 8.10am on Highway 97 just north of Orondo, Washington yesterday.
article_snippet: Scroll down for video .
article_snippet: The cause of the crash was not initially known.
article_snippet: Temperatures in the area were above freezing and there was no sign of snow or ice on the road.
article_snippet: But last night trooper Darren Wright said: 'We do suspect the driver fell asleep.'
highlights_snippet: The incident occurred around 8.10am on Highway 97 yesterday .
  