IDAHO SPRINGS, Colo. (CBS4) – The Interstate 70 Mountain Express Lane has been called a success by the Colorado Department of Transportation.

The 13-mile toll lane runs along the left shoulder of eastbound I-70 in Clear Creek County. It’s only been open a few times since its launch in December but the toll lanes have helped cut down on mountain traffic jams.

CDOT said drivers saw faster travel and fewer accidents.

Tolls have stayed below $10, about $4 to $6, but they could rise to $30 on peak travel days.