I-25 Frontage Road from Prospect to Mulberry to be Permanently Closed on July 6

Travel Advisory

June 29, 2020 - Northern Colorado - Frontage road to be permanently closed on the east side to allow for widening of interstate.

FORT COLLINS — On July 6, 2020, the I-25 frontage road on the east side of I-25 between Prospect Road and Mulberry Street will close permanently to allow for the expansion of the interstate.

Business access will be maintained on the frontage road off Mulberry Street. Through access will no longer be available. This closure is necessary to widen I-25 as part of the I-25 North Project: Johnstown to Fort Collins. Also, for much of the corridor, the frontage roads are within or close to the clear zone of I-25, creating dangerous head-to-head conditions if cars were to leave the interstate and inadvertently travel into oncoming frontage road traffic.

When complete in 2024, this project will add an Express Lane in each direction of I-25, replace aging bridges, make interchanges safer and more efficient, and improve infrastructure for bus transit along the I-25 corridor. The nearly $450 million project will also add carpool and transit facilities, create new pedestrian and bicycle access under I-25 at Kendall Parkway, improve drainage systems and improve the alignment of I-25 for safer travel as part of CDOT’s Whole System — Whole Safety initiative.


Map of the I-25 frontage road on the east side of I-25 between Prospect Road and Mulberry Street that will be closed permanently


For additional information about this project, call the project information line at 720-593-1996, email the team at northi25expresslanes@gmail.com, or visit the project website and sign up for updates at codot.gov/projects/north-i-25/johnstown-to-fort-collins. For information on travel conditions visit COtrip.org, sign up for CDOT Alerts, or call 511. Updates are also available via Twitter @ColoradoDOT and be sure to “Like” our Facebook page at facebook.com/coloradodot.