CDOT Begins Construction on Southbound I-225: Yosemite to I-25

October 30, 2017 - Denver Metro Colorado/CDOT Region 1 - Restriping pilot project will convert shoulder into additional lane to reduce congestion

Access restrictions:  DTC Blvd. on-ramp traffic to southbound I-225 will be restricted to northbound I-25 and will not have access to southbound I-25.

DENVER – The Colorado Department of Transportation (CDOT) and contractor partner KECI Colorado Inc. begin prep work this week to ease congestion on southbound I-225 in the Denver Tech Center area. Crews will convert the shoulder into an additional lane on southbound I-225 by re-striping less than a mile from Yosemite St. to I-25.  The re-striping project is expected to reduce delays by more than 50 percent on one of the most congested bottlenecks in the region.

Scheduled to begin Sunday morning, Nov. 5, drivers who use the DTC Blvd. on-ramp (coming from DTC Blvd., Yosemite St. and E. Quincy Ave.) to get on southbound I-225 where it merges with I-25 will not have access to southbound I-25. They will be directed to northbound I-25.  Other ways to get on southbound I-25 are Belleview and Orchard to the south and Hampden to the north.   The access restriction is necessary to prevent hazardous weaving and improve traffic flow on southbound I-225.  The access restriction will be permanent as part of the pilot project to reduce congestion on southbound I-225. Drivers on southbound I-225 prior to Yosemite St. will continue to have access to both southbound and northbound I-25 (see map and graphic).


Nighttime construction lasting up to one month - (Oct. 30 until mid to late November) Construction on southbound I-225 begins this week and will take less than a month to complete.  Work will occur at nights with at least one lane open on southbound I-225.  The project should be complete by the end of November 2017.

DTC Blvd. on-ramp to southbound I-225 closures – (Nov. 3-6) The on-ramp will temporarily close overnights on Friday (11 pm to 10 am), Saturday (9 pm to 10 am) and Sunday (9 pm to 5:30 am) for crews to place concrete barriers that will restrict on-ramp traffic to northbound I-25.   The barriers will be placed along the right shoulder of I-225 southbound.  The shoulder behind the barrier will be converted to a travel lane, carrying DTC Blvd. on-ramp traffic to northbound I-25.  These barriers will be in place permanently beginning Nov. 5.

Restriping southbound I-225 - (Nov. 10 - 13) Crews will restripe southbound I-225 from Yosemite St. to the I-25 interchange. Night and morning work only. Preparation work will take place the other nights.

Construction hours -Typical working hours on southbound I-225 are 11 pm to 5:30 am Mondays through Thursdays, Fridays 11 pm to 10 am, Saturdays 9 pm to 10 am and Sundays 9 pm to 5:30 am. Night work to occur on the DTC Blvd on-ramp as well.    


With traffic back-ups extending three miles on southbound I-225 during peak travel times, converting the shoulder to a lane is anticipated to cut traffic delays in half.  The cost of this project is less than $1 million and the work will take less than a month to complete, as compared to spending $65 million to build additional lanes and rebuild bridges, which would take a couple of years to complete.  The restriping is a pilot project and it will be evaluated and monitored for effectiveness.         


I-225 Restripe website

I-225 Restripe fact sheet

Hotline: 720-275-8243

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