CO 257 in Windsor closed to all traffic from July 5 to August 4

Project Update

June 28, 2023 - Northeastern Colorado - Local detours will be in place for regular traffic and commercial motor vehicles

Windsor – Colorado Highway 257 from north of Walnut Street to south of Eastman Park Drive will close for 30 days to perform major road reconstruction and complete as much work as possible before school resumes in August. From 7 a.m. on Wednesday, July 5 through 7 p.m. on Friday, August 4, approximately one mile of CO 257 will close to all traffic.

The following streets will not have access to or across CO 257 during the closure: Walnut Street, Chestnut Street, Commons Drive, and Eastman Park Drive. Garden Drive will remain open to through traffic only except for periodic short closures to reconstruct the intersection. Significant travel delays are expected. Drivers should plan ahead and seek alternate routes. Access to businesses and adjacent properties will be maintained.

Two signed detour routes will be in place:

  • The local detour will direct drivers around the west side of the closure using Crossroads Boulevard, 7th Street and 1st Street.
  • Through commercial truck traffic must use Eastman Park Drive, County Road 23 and CO 392 due to size and weight restrictions on local roads.

CO 257 full closure map

The Colorado Department of Transportation has coordinated closing CO 257 with the Town of Windsor. During the full closure, Windsor will be able to accelerate parts of the CO 257 / Eastman Park Drive intersection project. For more information on this project, click here. 

Crews will work extended hours and perform some activities over the weekend to complete this work as quickly as possible. Planned work includes a complete reconstruction of the roadway section. This full closure will save several weeks of one-lane alternating traffic conditions and partial intersection closures. Any changes to the closure schedule will be posted on message boards, cotrip.org and on the project web page.

CDOT and Coulson Excavating Company are improving nearly five miles of CO 257 between US 34 Business (Mile Point 5.6) in Greeley and Walnut Street (MP 10.4) in Windsor this year. Planned bridge repairs at MP 7.6, which is approximately two miles north of US 34 Business, will also require a temporary 20-day closure of CO 257 in the fall. This project resurfaces CO 257 to provide a smoother driving surface and increase the longevity of the highway. Intersection improvements at Crossroads Boulevard will enhance mobility by adding a second eastbound left turn lane to northbound CO 257. Safety improvements include installing new guardrail, roadside delineators, and rumble strips. Project completion is anticipated in the fall.

General work hours are Monday through Friday from 7 a.m. to 7 p.m. with occasional extended hours and weekend work. The construction schedule is weather-dependent and subject to change.

Stay Informed

For additional information about this project, contact the project team.

Know Before You Go

Travelers are urged to “know before you go.” Gather information about weather forecasts and anticipated travel impacts and current road conditions prior to hitting the road. CDOT resources include:

Remember: Slow For The Cone Zone

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!

Download the COtrip App!

The new free COtrip Planner mobile app was designed to meet the growing trend of information on mobile and tablet devices for the traveling public. The COtrip Planner app provides statewide, real-time traffic information, and works on mobile devices that operate on the iOS and Android platforms. Visit the Google Play Store (Android devices) or the Apple Store (iOS devices) to download!