Phase 2 of I-70 Arriba to Flagler project to begin March 16

Travel Advisory

March 9, 2020 - Northeastern Colorado

LINCOLN AND KIT CARSON COUNTY — On March 16, the Colorado Department of Transportation and contractor partner, Castle Rock Construction Company, will begin work on the next phase of the I-70 Arriba East and West Concrete Overlay Project. 

In this final phase, eastbound I-70 will close between mile points 380 (west of Arriba) and 396.1 (east of Flagler) to allow for asphalt milling, concrete paving, bridge overlay and guardrail installation. In early April, traffic will be moved into a head-to-head configuration on the westbound side of I-70 until Fall 2020. From March 16 to the switch, drivers can expect daytime lane closures at various locations as the temporary crossovers are installed.

Temporary on/off ramps will be used at the Flagler and Arriba interchanges to allow access to I-70. During daytime construction activities, the ramps will be split when necessary with one side being used for general traffic and one side for construction vehicle traffic. 

Motorists should watch for workers and drive with caution through the work zone. Speed limits through the work zone will be reduced to 65 mph and in some locations 55 mph.


This $44.6 million project will include concrete paving, hot mix asphalt, bridge overlay, full depth reclamation and striping. The new pavement and improved cross slopes will provide safer roads for motorists by better draining rain and melting snow. This project is expected to end in Fall 2020. Phase 1 of the project completed the westbound lanes with new concrete paving.


Motorists should expect various lane closures on I-70 in the work zone. Typical work hours will be Monday through Friday, 7 a.m. to 7 p.m. Weekend and overnight work may occur as needed. Motorists are asked to please go slow in 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!


For additional information about this project, call the project information line at (719) 215-1323, email the team at [email protected], or visit the project website and sign up for updates at 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:  


CDOT has approximately 3,000 employees located at its Denver headquarters and in regional offices 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.