Lane closures start early (4 a.m.) Tuesday on northbound I-25 between Mulberry Street and Mountain Vista Drive

September 18, 2019 - Northeastern Colorado

FORT COLLINS –The new Vine Drive bridge over Interstate 25 will reach another milestone when the concrete deck is poured on Tuesday, Sept. 24. The contractor plans to pour concrete from east to west, which means northbound I-25 will be down to a single lane as early as 4 a.m. Some travel delay is expected, especially during the morning commute. 

Motorists should expect various single-lane closures on northbound and southbound I-25 between Mulberry Street and Mountain Vista Drive from 4 a.m. until 5 p.m. on Tuesday. The contractor plans to pour the entire deck in one day. No I-25 lane closures are anticipated between Sept. 25 and Sept. 29 while the bridge deck is curing. The schedule is weather-dependent and subject to change.

The project is on schedule for completion this year. In addition to on-going bridge work, the Vine Drive / I-25 east frontage road intersection was reconstructed and opened to traffic in late August. Work continues at the Vine Drive / I-25 west frontage road intersection.

Since the intersection of Vine Drive and the I-25 west frontage road closed on Sept. 9, the contractor has made significant progress on embankment, grading and storm sewer work. The intersection is currently scheduled to reopen to all traffic in late October as originally planned. For motorist and crew safety, all traffic will continue to detour around the Vine Drive / I-25 west frontage road intersection. Access for emergency responders only will be provided through the work zone as an alternative to Vine Drive. Access to all businesses along the west frontage road will be maintained from the south. A detour map is available at

Detour for northbound I-25 west frontage road to Vine Drive

  • From Mulberry Street turn north on Timberline Road

  • Take Timberline Road to Vine Drive

Detour for eastbound Vine Drive to I-25 west frontage road

  • From Vine Drive turn south on Timberline Road

  • Turn east (left) on Mulberry Street

  • Turn north (left) on the I-25 west frontage road


The existing structure will be demolished and replaced with a new bridge carrying Vine Drive over I-25. Improvements will also be made to bridge approaches on Vine Drive and the I-25 frontage roads. Project completion is anticipated in early 2020. Originally built in 1966, the existing bridge warrants replacement as part of the Colorado Bridge Enterprise (CBE).

For additional information or to sign up for project updates, call the project hotline at 970-541-8955, send an email to [email protected] or visit the website at

For real-time information regarding traffic impacts on any state highway, motorists can sign up for CDOT email and text alerts by visiting and clicking on the small envelope icon at the bottom right of the page. Updates are also available via Twitter @coloradodot and Facebook (



The following tips are to help you stay safe while traveling through maintenance and construction work zones.

  • Do not speed in work zones. Obey the posted speed limits.

  • Stay Alert! Expect the unexpected.

  • Watch for workers. Drive with caution.

  • Don't change lanes unnecessarily.

  • Avoid using mobile devices such as phones while driving in work zones.

  • Turn on headlights so that workers and other drivers can see you.

  • Be especially alert at night while driving in work zones.

  • Expect delays, especially during peak travel times.

  • Allow ample space between you and the car in front of you.

  • Anticipate lane shifts and merge when directed to do so.

  • Be patient!


To heighten safety awareness, CDOT recently announced its Whole System — Whole Safety initiative. This project takes a systematic statewide approach to safety combining the benefits of CDOT’s programs that address driving behaviors, our built environment and the organization's operations. The goal is to improve the safety of Colorado’s transportation network by reducing the rate and severity of crashes and improving the safety of all transportation modes. The program has one simple mission—to get everyone home safely.


CDOT has approximately 3,000 employees located throughout Colorado, and manages more than 23,000 lane miles of highway and 3,429 bridges. CDOT also manages grant partnerships with a range of other agencies, including metropolitan planning organizations, local governments and airports. It also administers Bustang, the state-owned and operated interregional express service. Governor Polis has charged CDOT to further build on the state’s intermodal mobility options.