CO 138 closure on S-Curve Project in Sterling start Friday; Closure of CO 14 starts Wednesday

Travel Advisory

March 6, 2020 - Northeastern Colorado

LOGAN COUNTY — On March 6, the Colorado Department of Transportation will continue work in the city of Sterling on Colorado Highway 138 (3rd Street) and CO 14 (West Main). This work will require the following major impacts in the project work zone:

March 6 through Mid-Summer

  • Impacts: Full closure of CO 138 (north and southbound 3rd Street) at Chestnut Street. Chestnut Street will continue to allow full east and westbound traffic movement through the 3rd Street intersection.

  • Description: This work will include storm sewer installation and concrete roadway paving and striping.

  • Detour: Alternate routes are advised during this phase and detour signage will be in place throughout the work zone.

March 11 through Mid-Summer

  • Impacts: Full closure of eastbound CO 14 (West Main) from 10th Avenue to Division Avenue with head-to-head traffic moved to the westbound lanes.

  • Description: This reconfiguration will allow for work on storm sewer installation and concrete roadway paving and striping in the new eastbound lanes.


North, south, east and west project limits on Logan County map

Crews are currently working on US 6, CO 138, and CO 14 in the city of Sterling to complete work on the new S-Curve. These three major highways intersect within downtown Sterling and currently limit growth and development within the downtown core, lead to out-of-direction travel, and cause disruption from heavy truck traffic. This project will help alleviate downtown transportation issues by directing large trucks moving east-west through town onto a bypass or S-Curve alignment that will use abandoned railroad rights-of-way between 4th Street/Chestnut and 5th Street/Division/West Main, completing a direct connection between CO 14 and US 6 in the east-west direction. The project will also include conversion of several one-way streets to two-way streets, intersection improvements and signalization, reconstruction of West Main, and a complete mill and overlay of CO 138.

Project limits are as follows:

  • North boundary: mile point (MP) 2.95 on CO 138

  • East boundary: MP 404.60 on US 6

  • South boundary: MP 404.21 on US 6

  • West boundary: MP 236.10 on CO 14

All work on the project will be completed by Fall 2020. Parsons Construction Group of Westminster will perform as the prime contractor on this $16.6 million project.

  • Work hours: 7 a.m. to 6 p.m. Monday through Friday.


For project updates, please email [email protected], call the project hotline at (720) 682-1122, or visit the project website. Information about weekly lane closures is available at For information regarding CDOT projects statewide, log on to Updates are also available via Twitter @coloradodot and be sure to “Like” our Facebook page:


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.