Recently, Colorado and many other states have legalized the use of Marijuana, but are still trying to enforce DUI laws where the driver is under the influence of marijuana. Here's an article on the new ad campaign in Colorado: http://adage.com/article/media/colorado-s-drive-high-a-dui-poke-fun-pot-smokers/292027/
The National Highway and Traffic Safety Administration (NHTSA) has recently come out with a new survey revealing that driving while intoxicated with alcohol is on the decline, however driving while drugged is on the rise. The results examined the comparative risk of drunk and drugged driving over a 20-month period in Virginia Beach, Virginia. Researchers collected of data from more than 3,000 drivers involved in a crash in Virginia Beach and more than 6,000 crash-free drivers for comparison. One in Four drivers tested positive from the list of drugs they were evaluating. For a link to NHTSA's full study click here: http://www.nhtsa.gov/About+NHTSA/Press+Releases/2015/nhtsa-releases-2-impaired-driving-studies-02-2015).
Because of this survey, many states have launched campaigns and reports in news articles about the study, and Virginia is no different. See CBS reporting on the same issue here: http://www.cbsnews.com/news/stoned-driving-on-the-rise-not-as-risky-as-drinking-and-driving/
Virginia takes its DUI laws very seriously and it is a violation of 18.2-266 of the Virginia Code, more commonly referred to as our DUI law to drive under the influence of ANY narcotic drug or any other self-administered intoxicant or drug of whatsoever nature, or any combination of such drugs, to a degree which impairs his ability to drive or operate any motor vehicle. Virginia Code § 18.2-266, which includes Marijuana. If you've been charged with DUI based on an allegation of drugged driving you need a serious attorney specialized in these types of issues on your side.