Boulder

• 28th Street improvements — Pearl to Iris: This project will improve multimodal travel along 28th Street from Pearl to Iris. Northbound 28th and Valmont Road RTD Stop #17992 serving 205 and BOLT routes will be temporarily relocated to just south of the Valmont intersection until Dec. 31.

• 19th Street multimodal improvements: Work will continue to install curb/gutter, sidewalks and buffered bike lanes. 19th will be reduced to one lane with flaggers where work is occurring, until May 30.

• 19th Street and Fourmile Canyon Creek Underpass: Crews will begin replacing the bridge over Fourmile Canyon Creek and construct a bike/pedestrian underpass. Northbound RTD 204 bus stops at Riverside and Upland will be temporarily closed. Work is anticipated to end March 2, 2026.

• 30th Street multimodal improvements: On 30th Street from Colorado to Arapahoe, crews will be adding sidewalk-level protected bike lanes and transit stop improvements, requiring single lane closures as needed on 30th Street. Work is expected to be completed Feb. 11.

• 28th and Colorado protected intersection: This project is to install a protected intersection, sidewalk level protected bike lanes and bus lanes. There will be lane closures where work is occurring, as needed. Expect delays, pedestrian and bike detours when traveling in the area. Work is expected to be completed June 30.

• 63rd waterline replacement: Due to the need to replace two water lines under 63rd Street, lane shifts and a full closure of 63rd between Nautilus and 75th will occur for periods of time through June 30. Additionally, 63rd will be fully closed from Jay to Twin Lakes through Feb. 28. Jay Road and Spine Road will be closed both directions at their intersections with 63rd through Jan. 20. Work hours are 7 a.m.-5 p.m. Monday-Friday.

• Pipe rehabilitation: Work will include extensive cleaning in December and installing a new slip-lined pipe in February for the Dry Creek no. 2 ditch. Expect shoulder closures on the north and south sides of South Boulder Road during work hours, 8 a.m.-5 p.m., through Feb. 28.

• Foothills sanitary sewer relocation: To replace a failing sewer line that crosses Foothills Parkway, there will be bike lane closures and a closure on 47th. Work will be conducted between 7 a.m.-7 p.m. through March 12.

Boulder County

• Colo. 119 safety, mobility and bikeway construction: CDOT will begin work on Colo. 119/Diagonal Highway. This project is anticipated to be completed in the spring of 2027.

• 120th Street closure: Crews working on the Willoughby Corner Housing Project will close 120th Street between Colo. 7 and Emma Street.

• East County Line Road reconstruction: Public Works will rebuild East County Line Road between Zlaten Drive and St. Vrain Creek in order to widen the road and reduce some of the hills to increase safety for all travelers. The new road will include seven-foot wide paved shoulders in order to connect cyclists and pedestrians to the city of Longmont’s St. Vrain Trailhead. Work will continue through February.

Erie

• County Line Road corridor upgrade project Cheesman to Balcolm closure: The County Line Road corridor upgrade project spans from Kenosha Road to Highway 7 and will occur in smaller segments through January, weather permitting. Southbound traffic will now be rerouted onto Main Street, while northbound traffic will be redirected onto High Street. The speed limit on Main and High Streets will be 25 mph, and fines will be doubled for violations.

• WCR 7 waterline improvements: The town of Erie is working on the WCR 7 Waterline Improvements project. This project will install a new transmission waterline to secure the future delivery of potable water, impacting approximately 2.7 miles of WCR 7 and requiring significant traffic changes. Expect full closures between WCR 12 and Colo. 52, and single-lane traffic south to Erie Parkway through August.

• Sheridan Parkway and Ridgeview Drive traffic signal installation: Traffic signal installation at Sheridan Parkway and Ridgeview Drive will continue with phased work through April. Expect occasional lane restrictions 9 a.m.-3 p.m. Two-way traffic will remain open during construction.

• WCR 3 bridge replacement: Beginning Monday, WCR 3 between WCR 12 and Colo. 52 will be closed as part of the WCR 3 bridge replacement project. This project includes the removal of the existing bridge over Sullivan Ditch and installation of a new box culvert designed to support the roadway above and safely carry ditch water beneath. Additional upgrades will improve the roadway and guardrails. During this closure, access will be limited to local traffic only. Through-traffic will not be allowed. The project is expected to be completed by April 1.