LONGMONT, Colo. (CBS4)- A man who has been charged with harassing bicyclists has pleaded not guilty.

State troopers cited James Ernst, 75, of Erie for harassment, impeding the flow of traffic and improper use of a horn for the incident on Sept. 16.

The cyclists claim they were harassed near Longmont along County Line Road north of Highway 52. They caught the alleged harassment on video.

Cyclist Dirk Friel says the honking from the Ford Explorer went on for five minutes, even after he slowed down to try and get the driver to pass.

(credit: CBS)

Friel and his friend were riding right of the white line and in single file. Not knowing what the driver might do, both pulled out cellphones to take video.

The clip called “Insane Driver” is posted on YouTube and that is where a sound off of another kind began.

LINK: Bicycle Colorado