Fatal crashes may have one cause or multiple contributing factors. The number of drivers in Colorado involved in deadly accidents while using alcohol or drugs has steadily increased in recent years. Even so, careless/inattentive driving is the leading contributing factor among drivers in fatal crashes.
Recognizing the growing problem of distracted driving, federal transportation researchers in 2012 started categorizing Careless/Inattentive Driving as a separate contributing factor. For more information and patterns over the last seven years check out the interactive map here: knowledgeinitiative.org/interactive-crash-map