http://kuow.org en http://kuow.org/post/washington-state-patrol-expects-no-big-changes-legalized-marijuana <p></p><p></p><p>Officials with the Washington state Patrol say about 8 percent of the drivers they pull over turn out to be impaired by drugs. A lab test verifying marijuana in the blood is a factor in showing driver impairment, they say, but there’s never been a legal limit the way there is for alcohol. That changes with the new law allowing marijuana possession, which takes effect Thursday, Dec. 6. It contains a new limit on marijuana components in a driver’s bloodstream. Thu, 29 Nov 2012 02:57:00 +0000 Amy Radil 4307 at http://kuow.org Washington State Patrol Expects No Big Changes From Legalized Marijuana