Southbound I-225 Restriping & Lane Addition from Yosemite Street to I-25

I-225 Rush Hour

CDOT completed a project in late 2017 to reduce congestion on southbound I-225 in the Denver Tech Center (DTC) area by converting the shoulder into an additional lane. This was done by restriping less than a mile of southbound I-225 from Yosemite Street to I-25.  

Reduce congestion: The restriping project has reduced delays on one of the most congested bottlenecks in the region.

Access restrictions: Drivers on DTC Boulevard, Yosemite Street and E. Quincy Avenue who get on southbound I-225 where it merges with I-25 do not have access to southbound I-25, but they are directed to northbound I-25. This is necessary to prevent weaving and improve traffic flow on southbound I-225. Other ways to get on southbound I-25 are Belleview and Orchard to the south and Hampden to the north. Drivers on southbound I-225 prior to Yosemite Street  still have access to both southbound and northbound I-25. 



  • Cut traffic delays 
    Before the restriping project, traffic back-ups extended over three miles on southbound I-225 during peak travel times. Converting the shoulder to a lane has significantly reduced traffic delays. 
  • Cost-efficient and fast construction
    The cost of this project was less than $1 million, and the work took less than month to complete—as compared to spending more than $60 million to build additional lanes and rebuild bridges, which would take a couple of years to complete.