Virginia will be instituting cellphone free schools in the new year. More from Thomas Cage...Preview: Drinking coffee may help Virginians live longer. A new study has some interesting findings. More from Lisa Carton.Preview: Virginia officials say they're concerned over a new study highlighting the danger of driving while under the influence of marijuana. The study finds a third of drivers in the state believe people who consume marijuana are safe to drive. But health officials say driving under the influence can slow down reaction times, impair judgment, and decrease coordination . December is National Impaired Driving Prevention Month.