What is the answer to With some exceptions epidemiological studies indicate the the presence of THC in roughly what percentage of drivers injured or killed in traffic collisions?

Epidemiological studies suggest that the presence of THC (tetrahydrocannabinol) can be found in approximately 10-15% of drivers injured or killed in traffic collisions, though this percentage may vary by region and study methodology. It's important to note that the presence of THC does not necessarily imply impairment, as it can remain detectable in the body long after use. Additionally, other factors like alcohol and other drugs are often involved in these incidents.