Has Marijuana Legalization Led to More Car Accidents in Connecticut?

 Posted on September 15, 2026 in Criminal Defense

In 2021, Connecticut joined a large number of other states in ongoing efforts to legalize the recreational use of marijuana. Since then, adults have been allowed to possess and use a certain amount of cannabis. While this move was applauded by people who believe that marijuana is no more dangerous than alcohol, it also raised concerns about whether more people may drive while under the influence of cannabis. A recent study looked at the potential involvement of marijuana in traffic accidents in the state.

Because of the possibility that people who use marijuana may get behind the wheel and be unable to drive safely, police in Connecticut have been monitoring the roads and looking for drivers who may be impaired. When they pull drivers over, they may be watching for signs of marijuana use, and they may arrest drivers for DUI. While the penalties for marijuana DUI are the same as for driving under the influence of alcohol, proving intoxication by marijuana is not always easy. People in these situations can benefit from working with a lawyer who can help them defend against DUI charges.

Study Finds Link Between Cannabis Use and Traffic Fatalities

Researchers have looked at data related to fatal car accidents to determine the role that marijuana may have played in these accidents in the past and how it has changed since its legalization in Connecticut. In a study that was recently published, researchers looked at accidents that took place between 2018 and 2024, allowing them to compare statistics from before and after marijuana was legalized in the state.

According to the study’s findings, 32.8 percent of drivers who were killed in car accidents tested positive for cannabis prior to 2021, but this number increased to 37.9 percent after the legalization of marijuana. The increase was even more significant for pedestrians. Prior to legalization, 11 percent of pedestrians tested positive for cannabis, but after legalization, 20.6 percent tested positive.

Based on this data, researchers stated that marijuana use may have played an increasing role in traffic fatalities since its legalization in Connecticut. However, there is no way to tell how many of the people who tested positive for marijuana were actually intoxicated. Because cannabis can be detected in the body for several days or weeks after it was consumed, people who tested positive for the drug may have used it well before they were involved in an accident. Rather than indicating that more people are driving under the influence of marijuana, the results of the study may simply show that cannabis use in general has increased since it was legalized.

The study’s findings may also be skewed by the fact that the legalization of marijuana took place in the middle of the COVID-19 pandemic. After the pandemic began in 2020, the number of fatal car accidents in Connecticut increased significantly, reaching a high in 2022. There is no way to tell whether increases in traffic fatalities since 2021 could be attributed to marijuana or were simply part of the overall driving patterns related to the pandemic.

Regardless of the reasons behind the data, police officers in Connecticut have been paying more attention to intoxication by marijuana, and they may arrest drivers who they believe are under the influence. Because tests used to detect marijuana impairment are unreliable, officers who have received training as drug recognition experts are often used to determine whether to charge drivers with DUI. These officers may provide opinions on a driver’s level of intoxication based on physical symptoms, behavior, and other factors.

Contact Our Connecticut Marijuana DUI Lawyers

People who have been arrested for driving under the influence of marijuana will need to understand what options for defense may be available. At Woolf & Ross Law Firm, LLC, our lawyers can help clients determine what steps they can take to prevent a DUI conviction. We may challenge the opinions of drug recognition experts or take steps to show that tests showing that a person had cannabis in their system do not prove that they were intoxicated while driving. To learn how we can help defend against these charges, contact our Hartford marijuana DUI defense attorneys at 860-290-8690 and schedule a free consultation.