49d85a5b_North_Carolina_Crash_Data__Response
[Suggestion] Include data for impairment of driver by substances other than alcohol. [Response] 
Information about impairment by drugs is not available in the crash file. Besides alcohol, it is currently unknown what concentrations of any drug(be they prescription, over the counter,illicit) actually increases crash risk. Currently it is also nearly impossible for officers to measure the presence of any drug in the system of crash-involved drivers. Presently the only indicator of drug use in the crash file reflects the officer's suspicians. These are included so rarely in crash reports that this information cannot be used to understand either prevelance amoung crash-involved drivers or the extent to which any substance other than alcohol may have contributed to a crash
North Carolina Crash Data
Response