Massachusetts Registry of Motor Vehicles (RMV) Practice Test

The accurate statement is that marijuana use causes a bad loss of night vision. Consuming marijuana can significantly impair various cognitive and motor skills associated with driving, including visual perception. Specifically, it can diminish the eyes' ability to adapt to changes in light, which is crucial for safe driving at night. This impaired night vision leads to difficulties in seeing clearly in low-light conditions and can hinder the driver's ability to notice hazards or respond effectively to rapid changes in the driving environment. The other choices, while they may seem plausible, do not reflect the real impact of marijuana on driving. Enhancements in focus or night vision are not supported by scientific evidence; rather, marijuana tends to slow reaction times and can cause distortion in the perception of time and space. As for the claim that it has no effect on driving ability, numerous studies indicate that marijuana significantly impairs driving performance, particularly in low visibility conditions.