In the summer, winter, holidays or weekends that stretch of I-70 through Idaho Springs is one of the biggest problem areas for traffic backs ups.
The Colorado Department of Transportation is trying to fix the problem by expanding the eastbound lanes at the Twin Tunnels and along a three mile stretch through Idaho Springs.
The work is set to start on April 1 and should wrap up by November, turning the road into three lanes of interstate through the Twin Tunnels.
The eastbound lanes of I-70 will be shut down and traffic diverted onto a country road for eight months during months.
Tony De Vito with CDOT says that will mean big delays for people heading out of the mountains.
"We will have a widened county road with two lanes in one direction," De Vito said. "Speeds will be 35 to 40 miles an hour, but it will be much slower as you navigate some of those curves."
Westbound I-70 won't be as impacted, but when crews are blasting westbound I-70 will be closed while crews get that work finished.
"We have informed the contractor not to blast during peak travel times," De Vito said.
While the major work won't start until April 1, some prep work is scheduled to slow traffic down by next week. The left westbound lane will be shut down between noon and 5 p.m. on Jan. 9. The right lane will be closed eastbound and one lane will be closed westbound from 6 a.m. until 3 p.m. ON APRIL 1?