How can marijuana use affect you?

• You may not be able to track which lane you should be in.
• You may not be able to judge the safe distance.
• You may not be able to remain attentive and perform normal driving tasks.
• All of the above.
  Explanation:

  "Marijuana use may affect a motorist in several ways, including loss of tracking ability, which is the ability to maintain a vehicle in each lane, and impaired distance judgment, leading to problems from following too closely. Additionally, decreased vigilance can cause a motorist to follow too closely or drift into another lane and divide attention, as driving requires constant focus on traffic, roadway, weather conditions, passengers, and gauges."