Factors Influencing the Results of Marijuana Impairment Tests

With the legalization of marijuana in many parts of the world, concerns have been raised about driving under the influence of marijuana. Just like alcohol, marijuana can impair your ability to drive, and if you are caught, you could face serious consequences. To prevent this, law enforcement agencies are now using marijuana impairment testing to catch offenders. In this article, we will discuss everything you need to know about Marijuana impairment test, including how it works and how accurate it can be.

What is Marijuana Impairment Testing?

Marijuana impairment testing is a process used to determine whether a driver is impaired by marijuana while driving. There are two types of marijuana impairment tests: field sobriety tests and drug tests.

Field sobriety tests are conducted at the scene of a traffic stop and help the officer determine whether the driver is impaired by marijuana. These tests include a walk and turn, one-legged stand, and eye test. The officer will look for specific clues, such as poor balance or coordination, to determine if the driver is impaired.

Drug tests, on the other hand, are conducted after a person has been arrested and taken to the police station. These tests analyze the driver’s urine, blood, or saliva to determine whether they have been using marijuana and whether they are currently impaired.

How Accurate is Marijuana Impairment Testing?

Marijuana impairment testing is not as accurate as alcohol impairment testing. One of the reasons for this is because marijuana can stay in a person’s system for weeks after use. This means that the test may test positive for marijuana use even if the driver is not currently impaired.

In addition, THC, which is the psychoactive ingredient in marijuana, can affect different people in different ways. Some people may be more affected by THC than others, even if they have the same amount in their system. This means that a person may be impaired even if they have a low amount of THC in their system.

Despite these limitations, law enforcement agencies are still using marijuana impairment testing to catch offenders. If you are caught driving under the influence of marijuana, you could face serious consequences, including fines and license suspension.

What Should You Do if You Get Pulled Over?

If you get pulled over, the first thing you should do is remain calm. Do not admit to any wrongdoing and do not volunteer any information. The officer may ask you to perform a field sobriety test or take a drug test. You have the right to refuse these tests, but this could result in consequences such as a license suspension.

If you are given a drug test and test positive for marijuana impairment, you should contact an attorney immediately. It is important to have legal representation to defend your rights and ensure that you receive fair treatment.


Marijuana impairment testing is becoming more common as marijuana use becomes more widespread. It is important to understand how these tests work and the consequences of being caught driving under the influence of marijuana. If you are pulled over, remember to remain calm and contact an attorney if necessary. Remember, the best way to avoid being caught in a marijuana impairment test is to not drive under the influence of marijuana in the first place.