The Colorado State Patrol says they are running into a new issue on the roads: drivers getting into crashes while being behind a self-driving car and intoxicated.

As marijuana use in the United States is on the rise, a growing number of drivers are getting behind the wheel high, while regulations and law enforcement agencies scramble to keep up with the danger.

This December marks National Impaired Driving Prevention Month, serving as a reminder to stay vigilant against drunk driving during the winter holiday season and social gatherings where alcohol is ...