The Idaho Transportation Department is hosting an open house on Thursday, March 6, to share information and gather community input about plans to improve U.S. Highway 91 between Siphon Road and Reservation Road to address increased growth.
The public is invited to view preliminary design plans in person from 4:30 to 6:30 p.m. at Tyhee Elementary School at 12743 W. Tyhee Road in Chubbuck. Community members are encouraged to stop by to learn about the project and provide feedback. Project staff will be available to answer questions.
Preliminary design plans currently include:
- Widening US-91 between Siphon Road and Tyhee Road to two lanes in each direction with a center turn lane between Siphon Road and Tyhee Road.
- Resurfacing US-91 between Tyhee Road and Reservation Road.
- Improving residential access in the project area.
Those who are unable to attend in person are invited to view identical project information online and comment from March 6 to March 20 at itdprojects.idaho.gov/pages/us91-siphontoreservation.
“ITD recognizes how vital US-91 is to the Chubbuck area, and we want to be prepared as growth in the area continues,” Project Manager Bo Frasure said. “Input from the community will be essential as we move forward on this project.”
More information about the US-91 Siphon Road to Reservation Road project is available at itdprojects.idaho.gov/pages/us91-siphontoreservation.
The long-awaited reopening of Chubbuck Road has come and traffic is once again flowing from Chubbuck to the Highland area. The Idaho Transportation Department opened the road Friday afternoon to through traffic. However, the new underpass will still require a brief closure next summer to open the road up for pedestrian access.
The Chubbuck Road overpass, built in 1962 was an impediment to large loads travelling north and south on Interstate 15. As part of the System Interchange project the decision was made to transform Chubbuck Road into an underpass with additional facilities for pedestrians and bicyclists. That change necessitated a two-year closure for demolition and the construction of two new bridges to carry I-15 over Chubbuck Road.
Now that the new underpass is open to vehicle traffic, residents in Chubbuck wishing to travel to the Portneuf Wellness Complex or Highland High School will no longer be detoured through the Northgate Interchange.
“We really appreciate the public’s patience during this process,” said Project Manager Zak Johnson. “We’re really excited to have Chubbuck Road open to vehicle traffic again.”
While the road is now open for cars there is expected to be a short closure this summer for approximately two weeks so crews can complete the underpass lanes, curbing and sidewalks.
Originally built in the 1960s, the I-86 and I-15 System Interchange is undergoing $112 million of redesign work to improve safety and replace aging infrastructure.
Motorists should follow all signs and posted speed limits while traveling through the construction area. With crews working day and night at the System Interchange it is especially important that drivers be alert and travel safely.
Motorists are encouraged to use 511.idaho.gov or the 511 app to keep track of project detours. Project details are available on ITD’s projects website at itdprojects.idaho.gov/i-86i-15-system-interchange.
The Idaho Transportation Department is beginning construction to widen Interstate 15 to three lanes in each direction between the Northgate and Fort Hall interchanges to accommodate projected increases in traffic volumes. This Leading Idaho multi-year project includes widening I-15, constructing a median barrier to separate opposing lanes of traffic and reconstructing bridge structures, including overpasses and underpasses, to accommodate the additional lanes.
Motorists can expect to see traffic control devices in the project area as early as Monday morning. Work has been phased to maintain two lanes of traffic in each direction during the day for most of the project. However, motorists should be aware some nighttime work will require single-lane closures.
This fall, crews will shift traffic to create the space they need to build a median wall, reconstruct structures, and demolish and reconstruct the existing northbound lanes of the interstate.
During construction, motorists should expect:
- Nighttime work begins the week of August 19 and will continue for the first couple weeks of construction. Work will occur from 7 p.m. to 6 a.m. Nighttime single-lane closures may happen occasionally after this period.
- Daytime work is expected to begin early this fall and will occur between the hours of 7 a.m. and 6 p.m.
- Lane restrictions will occur on I-15. Most work requiring lane restrictions is anticipated to occur at night.
- Ramp adjustments will occur at the Fort Hall Interchange (Exit 80) to match the grade of the new mainline.
- Variable speed limit signs will be installed in the project area, allowing ITD to lower speeds when crews are working near traffic.
Construction is anticipated to be completed in 2027. The project will increase capacity and improve safety on I-15 to serve East Idaho’s growing transportation volumes for years to come.
Due to the large project area, the widening of this stretch of I-15 has been divided into two projects with separate contractors. These contractors will work simultaneously to complete the projects. Western Construction, Inc. and Sundt Construction are the contractors for the north and south project areas, respectively.
Construction is being funded as part of Idaho Governor Brad Little’s Leading Idaho transportation funding initiative. The Leading Idaho initiative allows ITD to take a deliberate approach to advance large projects that will enhance safety, improve mobility, further strengthen Idaho’s economy, and positively impact communities across the state for years to come.
To sign up for project updates:
Beginning tonight and continuing through Wednesday morning, nighttime closures will be in place for a section of Interstate 15 and Interstate 86 at the System Interchange allowing crews to safely place girders for one of the new bridges.
The I-86 eastbound to I-15 northbound ramp will be closed from 8 p.m. to 6 a.m. Monday and Tuesday nights. Drivers looking to head north on I-15 from I-86 will be detoured through the Pocatello Creek Interchange.
Ongoing construction at the System Interchange will improve safety and mobility while replacing bridges built in the 1960s. Work is expected to be complete in 2025.
Motorists should exercise caution while travelling through the construction zone. Those wishing to receive email updates about the System Interchange project can sign up online.
Drivers can also use the 511 app for the latest traffic conditions on all state roadways.
The Idaho Transportation Department (ITD) invites the public to an open house on Tuesday to comment on proposed improvements to make U.S. Highway 30 safer and address growing traffic in Pocatello.
Improvements are planned for US-30 between the intersections of Yellowstone Avenue and Oak Street and the Gould Street overpass and Garrett Way.
The open house will be from 5-7 p.m. at the Pocatello Streets Department Office at 2405 Garrett Way.
In 2018, ITD completed a study to analyze safety issues, traffic, geometrics, and community needs. Extensive traffic analyses, stakeholder meetings, and steering committee meetings were conducted as part of the study. The results of the study identified significant corridor improvements. In 2023, design began on the improvements, which address:
- Intersection operation and safety at Yellowstone Ave, McKinley Ave, and Garrett Way.
- An additional turn lane from Gould Street onto Garrett Way to improve signal operations and mobility through the corridor.
- Accesses safety
- Corridor-wide pedestrian facilities
- Stormwater collection
- Corridor-wide landscaping
Construction is scheduled for 2027.
“This is an important project for the traveling public in Pocatello,” Project Manager Kevin Sonico said. “These improvements will address the growth in the area and improve safety by addressing lane utilization issues and capacity issues in the corridor. People can stop by any time on Tuesday to learn more about the project and ask questions.”
For those who cannot attend the public meeting on May 7, ITD will post meeting displays on the project website at itdprojects.idaho.gov/pages/us-30-yellowstone-to-garrett-way. Comments will be received until June 5 and can be submitted at the meeting, online or by emailing agumm@jub.com.
Beginning Saturday evening drivers should expect various nighttime detours through next week at the System Interchange in Pocatello as crew demolish old bridges on southbound Interstate 15.
Two detours are scheduled for two nights each.
Eastbound travelers on Interstate 86 trying to head north on Interstate 15 will be detoured to the Pocatello Creek Interchange the following nights:
- Saturday, Dec. 16, from 9 p.m. to 7:30 a.m.
- Sunday, Dec. 17, from 7:30 p.m. to 7:30 a.m.
Northbound travelers on I-15 trying to head westbound on I-86 will be detoured to the Northgate Interchange the following nights:
- Tuesday, Dec. 19, from 7:30 p.m. to 7:30 a.m.
- Wednesday, Dec. 20, from 7:30 p.m. to 7:30 a.m.
During these detours it is important that drivers follow posted speed limits. As work will continue through the winter drivers need to be particularly cautious around snowplows by giving them extra room in the work zone.
Ongoing construction at the System Interchange will improve safety and mobility while replacing bridges built in the 1960s. Work is expected to be complete in 2025. Those wishing to learn more about the project can visit the website at itdprojects.idaho.gov/pages/i-86i-15-system-interchange.
A new three-lane Interstate 86 bridge at Chubbuck is now open as construction crews head into Thanksgiving week. The new bridge over the Union Pacific Railroad adds capacity, improves traffic flow, and is designed to last 80 years.
While the bridge is complete and open, work continues nearby with the installation of a new sound wall. In addition, paneling will be installed on the bridge to protect the railroad tracks from any debris falling off the bridge.
Crews will continue to work on the I-86/I-15 System Interchange through the winter months. The next major milestone is opening the new I-15 mainline roadway slated for mid-December. Following that contractors will begin demolition of the old I-15 bridges.
This week crews will work until noon Wednesday and return to the construction site on Monday. Still, it is important that drivers be safe while travelling through the System Interchange, particularly with increased holiday traffic.
“Please pay attention to construction signs, be courteous, follow posted speed limits, and drive safe so everyone can go home safely, including workers on the project,” Engineering Manager Aaron Baird said.
The Idaho Transportation Department (ITD) will hold an open house on Thursday, Nov. 2 from 4 to 7 p.m. to present preliminary plans for improvements along U.S. Highway 91 (Yellowstone Highway) between Park Lawn Drive and Siphon Road.
“This is an important project for the Chubbuck area,” Project Manager Kevin Sonico said. “These improvements will address the traffic growth in the area and make it safer for both drivers and pedestrians. We encourage everyone to stop by Chubbuck City Hall any time from 4 to7 p.m. on Thursday to learn more about the project. We’ll be ready to answer questions and collect comments.”
Plans include widening US-91 from three lanes to five lanes from Park Lawn Drive to Siphon Road. The project will also install a new signal and pedestrian facilities at the Siphon Road intersection. Lighting, curb, gutter, sidewalks and a shared-use path along the east side of US-91 will be constructed. In addition, the Chester Drain will be piped.
For those who cannot attend the public meeting on November 2, ITD will post meeting displays the following day on the project website itdprojects.idaho.gov/pages/park-lawn-and-siphon for review through Nov. 16. If you have questions about the project, or would like to submit feedback, you can contact the project’s public involvement manager, Andrea Gumm, at agumm@jub.com or 208-870-8751.
POCATELLO – At approximately 6:30 pm on Tuesday a mud slide necessitated the closure of SH-36 between Ovid and Preston. Continued warming temperatures resulted in two more slides in the area. As of 2:30 pm Wednesday the highway remains closed north of Mink Creek.
ITD crews are working to clear ditch and culverts to help the spring runoff waters move away from the highway. However, the safety of the travelling public is the primary concern and the road will remain closed until engineers are confident the roadway is safe.
To travel between Preston and Montpelier motorists can detour via SH-34 and US-30.
As Idaho enters the late spring, this winter’s heavy precipitation in the Franklin, Caribou, and Bear Lake Counties presents a significant chance of flooding. Motorists need to be aware of local conditions and not drive through water running over the roadways.
To get the latest updates on road conditions and closures, please check 511.idaho.gov or download the 511 app.
