Drivers on Interstate 84 in Caldwell will see a major change Friday and Saturday nights as westbound traffic shifts back to the westbound side of the interstate between the Centennial Way and Franklin Road interchanges.
To complete the traffic shift, I-84 will have several overnight ramp closures between the Centennial Way and Franklin Road interchanges from Thursday through Saturday between 10 p.m. and 5 a.m. These closures will allow crews to safely establish the new traffic pattern, which is expected to remain in place through summer 2026.
This milestone marks a key phase in the Idaho Transportation Department’s I-84 widening project. For the past year, westbound traffic has been temporarily using the eastbound side of the interstate to allow crews to rebuild the westbound lanes and add a third travel lane along with an auxiliary lane.
Now that work on the westbound lanes is completed, westbound traffic will return to the westbound side. Drivers will travel on the outer lanes while crews begin work in the center median. Two lanes will remain open in each direction during construction.
The I-84 widening project in Caldwell began in November 2023 and includes:
- Widening I-84 to three lanes in each direction with auxiliary lanes
- Replacing the 10th Avenue Interchange
- Removing one westbound on-ramp at the 10th Avenue Interchange
- Updating the pedestrian overpass
- Constructing a soundwall along Hannibal Street
- Adding a traffic signal at the westbound ramps at the Centennial Way Interchange
The speed limit in the work zone is 55 mph. Drivers are asked to slow down, pay attention and follow all posted signs. Crews and heavy equipment will be working close to traffic.
Construction remains on schedule and is expected to be completed in 2027.
For real-time traffic updates and statewide road conditions, visit 511.idaho.gov or use the Idaho 511 app.
Drivers on State Highway 55 can expect short traffic delays north of Horseshoe Bend Aug. 5–7 as crews drill to collect roadway samples in preparation for a future pavement rehabilitation project.
Crews will be working at multiple locations within a one-mile stretch of the highway north of town. Each sample will take approximately one hour to collect, with single lane closures in place during that time. Flaggers will direct traffic through the work zones.
The road will remain open throughout the operation, but drivers should plan for brief delays and reduced speeds. The Idaho Transportation Department asks motorists to slow down in the work zone for the safety of travelers and work crews.
For current traffic conditions and updates, visit 511.idaho.gov or download the Idaho 511 app.
Drivers should plan for delays starting Monday as the Idaho Transportation Department begins sealcoating operations on State Highway 167, from Grand View to Mountain Home Air Force Base, and State Highway 67, from the base to SH-51.
Crews will reduce each highway to one lane with flaggers and pilot cars directing traffic. Speed limits will be reduced through active work zones. Work will take place Monday through Saturday, from 8 a.m. to 8 p.m., and is expected to be completed in early September.
Sealcoating is a summer maintenance process that helps preserve the roadway and extend pavement life. It also improves vehicle traction by creating a skid-resistant surface. The treatment requires hot, dry weather to ensure that oil and rock chips properly bond.
Drivers are encouraged to plan ahead, allow extra time, and use caution near crews and equipment.
Stay informed by signing up for email updates at https://lp.constantcontactpages.com/sv/pI5SwgY. For real-time traffic impacts and detour information, visit 511.idaho.gov or use the Idaho 511 app.
Motorists can expect nighttime lane reductions on State Highway 69 from Kuna to Interstate 84 this summer while the Idaho Transportation Department applies a hot chip seal to the roadway. The project will extend the life of the pavement.
Construction will begin near Kuna tonight and move north toward I-84. All pavement work is expected to be complete by late summer.
Motorists can expect:
- All work to take place overnight.
- At least one lane will remain open in each direction at all times on SH-69.
- Shifting traffic patterns and flaggers in the roadway.
- Reduced speed limits to 35 mph.
- Intermittent ramp closures and detours at the Meridian Interchange. Roadside message boards will provide drivers with advance notice.
- Access to residences and businesses will remain open.
ITD is committed to minimizing disruption during construction while prioritizing the safety of both crews and motorists. Chip seal oil is extremely hot. Drivers are urged to use extra caution when traveling through active work zones, keep their distance from paving equipment and follow instructions from signs and flaggers.
Visit the project website at itdprojects.idaho.gov/pages/55-69maintenance to learn more, sign up for email updates or contact the project team.
For real-time traffic impacts drivers are encouraged to use the Idaho 511 system to plan ahead for travel.
The Idaho Transportation Department invites the public to comment on plans to replace the Rainbow Bridge over the North Fork Payette River on State Highway 55.
Community members can participate in an in-person open house from 4 to 7 p.m. tomorrow, at American Legion Post 60 (105 Mill Street) in Cascade. Those unable to attend in person may review materials and provide input online at
sh55rainbowbridge.com between July 22 and Aug. 5.
The open house will feature:
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Updates on the project timeline
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Design options for the new bridge and retaining walls
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Information about the condition and history of the existing 1933 bridge
The existing Rainbow Bridge was constructed in 1933 and no longer meets standards for state highway bridges. The new bridge will be located slightly northwest and upstream of the current location. It will include wider lanes and shoulders, and improved sight distance for traffic crossing the bridge. Construction of a new bridge is currently scheduled to begin in 2028.
Initial feedback was gathered during a July 2024 open house. More information is available at
sh55rainbowbridge.com. Questions can be directed to the project team at info@55eagletonewmeadows.org or (208) 391-6580.
The westbound on-ramp to I-84 at Garrity Boulevard will be closed Monday night beginning at 8 p.m. as crews complete paving work.
The ramp is expected to reopen by 5 a.m. Tuesday morning.
Motorists are advised to use alternate routes and plan ahead to avoid delays. Nearby interchanges at Northside Boulevard and Meridian Road can be used to access westbound I-84.
For the latest traffic updates, visit 511.idaho.gov or download the Idaho 511 app.
The Idaho Transportation Department, in partnership with Garden City, invites the community to attend an online meeting to learn more about a study to develop a stormwater drainage plan and identify corridor improvement projects. Future projects may include multi-use pathways that serve pedestrians and cyclists and other active modes along Chinden Boulevard.
The online self-guided meeting will be available from July 18 through August 1 at https://itdprojects.idaho.gov/pages/chinden-drainage-and-design.
The online meeting provides the public with an opportunity to review and provide feedback on study concepts for improved water management systems and future projects to enhance connectivity and mobility along the corridor.
The study aims to develop an integrated corridor plan to guide development and identify specific projects for future planning, design, and construction. This unified plan will ensure that consistent drainage and multi-modal facilities, such as sidewalks and bike lanes, are included with each new construction project along the corridor.
Currently, funding has not been allocated for future Chinden Boulevard improvement projects. Final recommendations and cost estimates are scheduled to be completed early in 2026.
The Idaho Transportation Department invites community members to learn about the future State Highway 16 and State Highway 44 Interchange at a public meeting Thursday evening. Construction will begin this summer to replace the current intersection with a new interchange design that includes ramps to help drivers get on and off the highway more safely and easily.
Community members may participate in person Thursday, or online July 17-31, to learn about anticipated traffic impacts and how to stay informed during construction.
“The new interchange at SH-16 and SH-44 will address growing traffic demands in the Treasure Valley,” Project Manager Styles Salek said. “This interchange will also help reduce congestion along West State Street [SH-44], a heavily traveled route for commuters and travelers alike.”
The interchange is part of ITD’s long-term vision for State Highway 16. The first phase of highway improvements, that included highway widening, were completed in 2014 between US-20/26 and SH-44.
Funding for this project comes from the Idaho Transportation Expansion and Congestion Mitigation bonding program. The program allows ITD to accelerate project timelines to address rapid growth and build critical infrastructure today that would otherwise take many years to complete.
Stay informed by signing up for email and text alerts regarding project updates. Text HIGHWAY16 to 1-866-483-8422 or visit itdprojects.org/sh16corridor. For questions, contact the project team at (208) 334-8008. Maps and other details can also be found on the project website.
The Idaho Transportation Department will change the traffic pattern on westbound I-84 in Caldwell starting Sunday night. Westbound motorists are advised to drive with caution and follow signage.
Under the new traffic pattern, westbound traffic will split into two lanes just after the 10th Avenue Interchange. The right lane will allow drivers to either continue west or exit at Centennial Way, while the left lane will continue westbound with no access to the exit. Once the lanes split, there will be a physical barrier between them, and drivers will be unable to change lanes. Motorists should pay close attention to signage and make sure they are in the correct lane before the split, especially if they plan to exit at Centennial Way. The lanes will merge back together just after the Centennial Way Interchange and westbound traffic will return to its regular configuration. Click here to view a map of the traffic change.
To set up the traffic changes, crews will close the westbound off-ramp at Centennial Way the night of Sunday, July 13 from 10 p.m. to 5 a.m. Motorists will be detoured to Exit 26 where they can then return on I-84 eastbound to exit at Centennial Way. Click here to view a detour map.
In early August, crews plan to move into the next phase of construction. Westbound traffic will return to the westbound side of the highway and ITD expects to reopen the 10th Avenue westbound on-ramp at that time. The ramp was closed in June to reconstruct the westbound lanes on I-84.
The I-84 widening project in Caldwell began in November 2023 and includes:
- Widening I-84 to three lanes in each direction with auxiliary lanes between interchanges.
- Replacing the 10th Avenue Interchange.
- Removing one westbound on-ramp at the 10th Avenue Interchange.
- Updating the pedestrian overpass.
- Building a sound wall along Hannibal Street.
- Adding a traffic signal at the westbound ramps at the Centennial Way Interchange.
The speed limit in the construction zone is 55 miles per hour. Drivers should slow down, pay attention and follow all posted signs. Crews and heavy equipment will be working close to traffic.
Construction is expected to be finished in 2027. For more information and to sign up for email or text updates, visit itdprojects.idaho.gov/pages/i-84-corridor or call (208) 334-8002.
Drivers can also use Idaho 511 to check for real-time traffic impacts related to construction projects and road conditions statewide.
Interstate 84 will close overnight under the Karcher Interchange this Sunday and Monday to protect crews working on the Karcher Interchange Bridge. Detours will be in place.
Eastbound I-84 will close Sunday and westbound I-84 will close Monday. Closures will begin at 10 p.m. and end by 5 a.m. each night.
Motorists traveling eastbound on I-84 Sunday night will:
- Exit I-84 using the Karcher Interchange (Exit 33).
- Cross Karcher Road.
- Use the eastbound on-ramp to merge back on to I-84.
Motorists traveling westbound on I-84 Monday night will:
- Exit I-84 at the Northside Interchange (Exit 35).
- Travel north on Northside Boulevard.
- Turn left on to Karcher Road.
- Travel west until you reach the Karcher Interchange westbound on-ramp.
- Use the Karcher Interchange westbound on-ramp to merge back on to westbound I-84.
View the detour maps at itdprojects.idaho.gov/pages/karchericmaps.
This work will facilitate the addition of a third westbound lane on Karcher Road to accommodate higher traffic volumes. Other improvements for this project include:
- Adding a free-running right hand turn at the westbound off-ramp
- Paving a third westbound lane on Karcher Road from the westbound off-ramp to Sundance Road
- Reinforcing the Indian Creek Bridge to support the new lane
- Updating signal equipment and adding a pedestrian flashing beacon at the eastbound on-ramp
- Building a mixed-use path on the north side of Karcher Road
These improvements will increase safety and traffic flow at the interchange. Construction is expected to be completed in fall 2025.
Stay informed regarding any schedule changes by signing up for email and text alerts regarding project updates. Text 84CORRIDOR to 1-866-483-8422 or visit itdprojects.idaho.gov/pages/karcheric. For questions, contact the project team at (208) 334-8002. Maps and other details can also be found on the project website.
