Breadcrumb Home How high is too high to drive? Thursday, February 4, 2016 https://www.youtube.com/watch?list=PLvntPLkd9IMclGMYuEObbhpjojETckjqV&v=_WcYY4E… Researchers at UI's National Advanced Driving Simulator are featured in a CBC segment on how smoking marijuana affects a person's ability to drive.