With efforts underway for marijuana legalization in North Carolina lining up with successful initiatives across the country, traffic safety officials are turning their thoughts to concerns about drug-impaired driving. Police and prosecutors are able to measure blood alcohol concentration, and 0.08 percent is the legal limit for alcohol intoxication across the country. However, no similar situation exists for cannabis; there is little scientific consensus about the level of cannabis intake that affects a person's driving ability. In addition, there are no generally accepted roadside screening devices that allow police to assess impairment at an accident scene or traffic stop.
Recent years have seen a loosening of marijuana laws in many parts of the county. For example: