The Ada County Highway District has announced that Cole Road reconstruction near the I-84 interchange in Boise, Idaho, is set to begin as early as mid-April 2026, with the project targeting aging pavement and outdated pedestrian infrastructure along one of the Treasure Valley’s busiest commercial corridors. The work will affect the stretch of Cole Road between Victory Road and Overland Road, an area heavily traveled by residents across the region — including drivers from Canyon County communities like Nampa and Caldwell who regularly use the I-84 corridor.
Background: Aging Infrastructure Prompting the Rebuild
According to ACHD, the pavement along this section of Cole Road “has reached the end of its service life” and must be repaired to meet modern standards. The district said the reconstruction will also include upgrades to pedestrian signals and updates to pedestrian ramps to bring the corridor into compliance with Americans with Disabilities Act requirements.
The Cole Road and I-84 interchange serves as a critical access point for a dense commercial zone that includes well-known destinations such as the Boise Costco warehouse and the Regal Edwards movie theater. The area draws shoppers and visitors from throughout the Treasure Valley, making the condition and capacity of that roadway a matter of regional concern.
Key Details: Timeline, Work Hours, and Construction Impacts
ACHD said construction work will primarily occur at night in order to reduce traffic impacts for commuters and businesses during daytime hours. Despite efforts to minimize disruption, the agency noted that drivers and nearby residents should expect lane restrictions and typical construction-related impacts, including noise, dust, ground vibration, and equipment backup alarms.
The project is expected to be completed in late fall 2026, meaning motorists should plan for several months of periodic disruptions along this section of Cole Road. ACHD did not specify exact detour routes in its announcement but indicated that lane restrictions will be in place during the construction period.
Drivers who regularly use Cole Road to access I-84 westbound toward Canyon County are encouraged to monitor ACHD’s communications for updated traffic advisories as the project progresses. Canyon County commuters who travel this route for work or commerce may want to identify alternate access points during peak construction phases.
Impact on Canyon County Residents and Treasure Valley Commuters
While the Cole Road project falls within Ada County’s jurisdiction, its effects will ripple across the broader Treasure Valley. Thousands of Canyon County residents commute daily via I-84, and the Cole Road interchange is a frequent off-ramp for those heading to Boise-area shopping, employment, and services.
Infrastructure projects like this one reflect the growing pressure that rapid regional population growth is placing on roads built for a much smaller base of users. Keeping major arterials in functional condition is a core responsibility of highway districts — and one that directly affects the economic productivity and quality of life for working families throughout the region.
Closer to home, Canyon County has its own share of infrastructure activity underway. Nampa’s Middleton Road closure is set to begin April 13 for a major summer widening project, adding to the list of Treasure Valley corridors that drivers will need to navigate carefully in the coming months. Additionally, utility reliability remains a concern across the region, as demonstrated by a recent equipment failure that knocked out power to nearly 1,400 Idaho Power customers in downtown Caldwell.
For broader statewide infrastructure and transportation news, visit Idaho News.
What Comes Next
The Cole Road reconstruction is expected to begin as early as mid-April 2026, with completion targeted for late fall 2026. ACHD has indicated that night work will be the primary construction window to limit daytime traffic disruptions. Motorists traveling the Cole Road corridor near I-84 should allow extra time during the construction period and remain alert to changing lane configurations.
Canyon County and Treasure Valley drivers are encouraged to check ACHD’s official communications channels for project updates, adjusted timelines, or changes to lane restriction schedules as work progresses through the summer and into the fall.