Research Project Results

The National Cooperative Research and Evaluation Program (also known as the Behavioral Traffic Safety Cooperative Research Program) conducts research on pressing issues in traffic safety.

Impact of the Legalization and Decriminalization of Marijuana On the DWI System

In its first completed research project, the National Cooperative Research and Evaluation Program (NCREP) convened a group of national experts, representing states that had enacted such laws, to discuss the potential downstream effects of marijuana legalization on the entire impaired driving system. 

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Key takeaways from the meeting include the following recommendations for states:

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