CASTLE ROCK, Colo. — All traffic lanes in the Interstate 25 Gap between Castle Rock and Monument will open to drivers by 8 a.m. Friday, the Colorado Department of Transportation (CDOT) said.
The opening comes nearly a year ahead of schedule, CDOT said.
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CDOT and contractor Kraemer North America broke ground on the $419 million project, which spans 18 miles between Castle Rock and Monument, in September 2018. They originally anticipated opening the new tolled express lanes and completing major construction in November 2022.
The express lanes span 14 miles on northbound I-25 and 15 miles on southbound I-25.
Drivers can use the express lanes without paying a toll until testing is complete in fall 2022. Two general-purpose lanes in each direction will always remain free to travel.
Northbound drivers can enter the express lanes through the dashed white lines two miles north of County Line Road and at Larkspur. Southbound drivers can enter the lanes just south of Castle Rock and Larkspur.
In addition to the newly-added toll lanes, improvements to the stretch of interstate include wider shoulders, rebuilt bridges, new wildlife crossings and new pavement.
Minor construction on the Gap project will continue into 2022. In the spring and summer, crews will finish paving and striping the interstate near Larkspur, as well as finalizing tolling infrastructure and completing other minor construction activities. The project is scheduled to be completely finished by November, CDOT said.
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