Planning is underway to improve the I-15 South Blackfoot Interchange (Exit 89)

Aerial photo of south Blackfoot interchange

The Idaho Transportation Department has begun the planning process to improve the South Blackfoot Interchange at Exit 89. The South Blackfoot Interchange has served motorists since 1961. Since then, eastern Idaho’s population and traffic volumes have greatly increased.

At this interchange, Interstate 15 crosses over U.S. Highway 91 on the Fort Hall Reservation. The interchange is in an area of I-15 that is heavily used for commercial, residential and recreational travel. To improve safety and mobility for motorists, it is necessary for ITD to replace the interchange with a design that has increased capacity and meets current standards.

Project plans currently include:

  • Lengthening ramps to improve safety.
  • Adding a dedicated exit lane to off-ramps to improve ramp operations.
  • Adjusting the interchange to accommodate future additional lanes on I-15.

Improvements to this interchange will be developed and designed based on traffic and other technical data, an environmental evaluation, surveying, and input from the public. The planning, design and environmental evaluation stage of the project is expected to be completed in 2026. Construction of the improvements is anticipated to begin in 2030, depending on the availability of further funding. This project is utilizing both state and federal funding.

ITD will provide multiple opportunities for the public to learn more about the I-15 South Blackfoot Interchange project throughout project development, including a public open house and pop-up meetings in early 2025. For more information visit the project website at itdprojects.idaho.gov/pages/i-15-corridor or call 208-252-5553.

Pocatello Creek ramp closure scheduled for this week

Drone photo of the System Interchange at Pocatello.

Beginning tomorrow at 7 a.m. the Pocatello Creek Road on-ramp to northbound Interstate 15 will be closed to allow crews to pave the new on-ramp. The closure is expected to last until approximately 5 p.m. Friday. Detours will be in place to guide traffic to the Northgate Interchange or to the Clark Street Exit.

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. The project is scheduled to be completed next summer.

Motorists should carefully follow 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 proceed safely through the work area.

Motorists are encouraged to use https://511.idaho.gov or the 511 app to keep track of project detours. Project details are available here on ITD’s projects website —https://itdprojects.idaho.gov/pages/i-86i-15-system-interchange

ITD and ISP to host winter driving classes

Photograph showing class for winter driver safety

EASTERN IDAHO – The Idaho Transportation Department (ITD), Idaho State Police (ISP), as well as Chubbuck and Bonneville County Police Departments are teaming up to provide free, informative and engaging winter driving safety classes through November as the region prepares for icy roads and adverse weather.

While these courses are beneficial for drivers of all ages and skill levels, they are especially geared to young drivers and anyone new to the area who may be preparing for their first winter driving season.

The course will be taught by ISP Troopers, local law enforcement officers and ITD Operators, covering a wide range of topics from proper vehicle preparation, equipment, road conditions, driving tips, crashes, and snowplow safety.

Participants who attend the course will receive a certificate of completion and be eligible for a 10% discount on a set of new snow tires at participating Les Schwab Tires locations.

THURSDAY, NOVEMBER 7

7:00 p.m. – 8:30 p.m.

Rocky Mt, Middle School Auditorium

3443 N. Ammon Rd.

Idaho Falls, ID

TUESDAY, NOVEMBER 12

5:30 p.m. – 6:30 p.m.

Chubbuck City Hall

290 East Linden Ave.

Chubbuck, ID

Seating is limited and classes are filling up quickly! Attendees should register online-click here for the Idaho Falls class or click here for the Chubbuck class to reserve a seat. Additional courses may be scheduled at a later date.

 

Pocatello Creek ramp closure scheduled for tomorrow

Beginning tomorrow at 9 a.m. the Pocatello Creek Road on-ramp to northbound Interstate 15 will be closed to allow crews to remove pavement and to prepare to pave the new on-ramp. The closure is expected to last until approximately 2 p.m. Detours will be in place to guide traffic to the Northgate Interchange or to the Clark Street Exit.

Cold weather paving in Idaho: how we do it and why it works

Paving, compacting and temperature testing occurring in Idaho with Fall leaves in the background.

 

The Idaho Transportation Department is overseeing more road construction than ever before. This work continues as temperatures are cooling and the ice and snow make their all-to-soon appearance. How does ITD successfully pave a road and have one of the shortest summer seasons in the country? Materials engineering and testing actually do make it possible.

 

Before asphalt pavement is ever laid, the surface where it needs to go is sprayed with a binder that will make it stick. This is called tack, a liquid made of oil and water. Tack must naturally break apart to become adhesive, separating as it lays across the surface where paving will happen. As it breaks, tack turns from a brown color to darker black, indicating that breaking has happened, and asphalt can be laid on top.

 

On the warmest of Idaho summer days, tack breaks in about ten minutes. When it’s colder, it can take hours. Still, with the right process, tack will break. ITD just knows it takes longer and plans accordingly.

 

Hot mixed asphalt is combined in a hot plant that can heat the components—crushed gravel and oil—to more than 300 degrees. This is dumped from a truck and spread using a paver, then compacted with a roller. ITD inspectors are on site anytime the contractor is, testing temperatures, compaction and much more to ensure that taxpayers get their money’s worth out of each project.

 

For quality compaction on state highways and interstates, the process must occur between 240-280 degrees. On warm summer days, asphalt must sit for a while after being spread before it is cool enough to be compacted. On colder days, asphalt loads hauled from hot plants are covered in transit to retain the most amount of heat. The asphalt will then be spread, and the roller follows closely behind to compact immediately before the material has cooled too much. All century-old, effective tricks of the trade in action.

 

“We don’t loosen up our requirements just because it gets cold,” ITD Materials Engineering Manager Mark Hayes said. “All contractors are held to the same quality materials standards and only operate when there are ways to do it right.”

 

Most of Idaho’s state highways run through rural areas, far removed from permanent hot plant locations. This fall, paving is occurring on State Highway 28 between Leadore and Salmon. The closest permanent hot plant sits in Idaho Falls, nearly four hours away. Enter the mobile hot plant erected by contractors at the ITD Leadore gravel pit, less than five miles from where the asphalt needs to be delivered.

 

In Rexburg, where paving is still occurring on multiple interchanges off U.S. Highway 20, the contractor’s permanent hot plant lies in Teton, less than ten miles away. Planning to have these proximities ensures that temperature requirements are met, and paving can be done successfully both earlier and later in the year.

 

Of course, there comes a cold enough ambient daily temperature that means paving operations are simply no longer viable. ITD requires that the temperature be 40 degrees and rising for paving to happen, which can result in fewer hours to pave during the fall but still allows a window of work. The right equipment, materials, planning, testing and operating tricks of the trade make it so ITD and contractors can pave with quality even when it is colder outside.

 

When you see paving equipment and a compacting roller working close together while your heater is on inside your car, know that ITD and the industry have the brief Idaho summers and cold Idaho temperatures on tap. That new road surface will meet the same metrics as summer paving, ensuring it lasts for many years to come.

The Unhailed, Underappreciated Emergency Responders

SH-33 with road blockades and a pickup truck following an accident

 
People see the Idaho Transportation Department logo and seem to have an automatic response, for better or worse. They’re the ones causing construction delays, needing to get the snow off the road already, or taking too long whatever they’re doing. They don’t do anything right and never will. Their flashing orange lights could just as easily be the mailman.

It’s not likely that you think of ITD as being the ones to first call 911, the ones to keep you from freezing or assess injury at the side of the road. They’re not your emergency responders. But then again, yes, they are.

All across Idaho, there is no one that travels the over 12,000 lane miles of highways and interstates more continually than the men and women behind the blue and orange ITD logo. The likelihood that they’ll be there when a crash or emergency occurs is higher than anyone else. The police and ambulance have to be called in. ITD is already there.

When two crop duster planes collided and crashed alongside US-26 near Arco, an ITD striping crew was there, becoming the first to assess the pilots. When a motorcycle crash occurred on Interstate 15 near Dubois, part of the ITD maintenance crew was there, already working the roads they consider their own. The story is similar in the case of many incidents across Idaho over the years.

“We spend so much time on the road, that nine times out of ten, we’re the first on scene when anything happens,” Idaho Falls area foreman Jared Loosli said. “And we’re not just going to pass by and leave.”

In the instance of a recent multi-fatality crash near the I-15/ US-20 interchange, Loosli and his crew were called in immediately to assist the Idaho State Police. Most people don’t realize that when state troopers get called out, ITD is almost always called out too.

“We have great foremen for ITD here in Idaho,” ISP Lieutenant Marvin Crane said. “We have personal relationships with them, and they never say they can’t do something. They’re always asking, ‘What do you need?’ and getting things done within minutes.”

“It does affect you,” Loosli stated, also noting that the worst incident he’s ever been a part of happened to one of his own guys.

“The first thing I’m thinking about is my crew,” Ashton/ Island Park foreman Ryan Wright added. “At that point, there are no traffic devices, there’s not time and it’s not the priority. It’s just our guy in the middle of everything trying to help.”

Very recently, Driggs/ St. Anthony Foreman Lucas Richins witnessed what all ITD foremen prioritize and fear the most. An ITD maintenance worker was hit after a distracted driver ran through a roadblock while powerline repair work was being done on SH-33.

So not only are ITD employees unhailed first responders, they’re also the underappreciated workers putting their lives on the line every day. Earlier this year, three of Loosli’s crew were removing hazards from I-15 when a semi grazed the side of their vehicle, damaging the rear end and taking off the driver’s side mirror. A mere two inches would’ve changed the outcome of that incident entirely.

What is it that keeps the guys in yellow working in these risky situations and responding to emergencies, knowing full well that public opinion is often negative and even rude?

“These are small communities,” Mackay/ Challis foreman Jeremy Johnson noted. “When we go out on a call, it could very well be our own friends and families. We’re thinking of keeping them safe in everything we do.”

“When I’m doing something myself, I can see the progress and know that I’m making things safer for everyone,” Wright shared. “I actually love to go out plowing. I love what I do.”

“It’s really a mentality,” Loosli says. “You either have it or you don’t honestly. People complain because they drive by and see four guys standing around. But we know why, we see the bigger picture and the process. The 30 seconds people see isn’t the story of the whole 10-hour day at all.”

“On instinct, I’m thinking about what I could have done, how could this have been prevented?” Richins said. “But then the biggest thought becomes frustration. We’re here trying to help and to serve. When we close a road, the whole point is to keep people safe. Driver awareness is so negligent that it really is frustrating. It’s dangerous.”

Adding to the dangerous nature of the job is the reality that the ITD fleet are not considered emergency vehicles, and ITD signage is too often not respected. Multiple layers of striped road blockades or orange traffic barrels somehow don’t always keep people out.

“We don’t enjoy closing a road or causing delays,” Richins emphasized. “We do it and we have to because it is the safest way. People need to be patient and have respect.”

“I don’t need to be liked,” Wright added. “I’m still here to do a job and to protect people.”

So maybe the next time you barely notice the flashing orange lights of an ITD vehicle alongside the road, want to scream in standstill construction traffic or at being stuck behind a plow, you’ll slow down and think too that those folks in bright yellow are also the ones who will be there before anyone else can. They could be the difference between freezing after sliding off the road or staying warm until the tow truck gets there. They could be the one to help make sure that your own family and friends across our tight-knit Idaho communities are given emergency support in time to matter.

It’s even highly likely that they will be.

Closure of SH-38 railroad crossings near Malad starts Sept. 19

Three railroad crossings on State Highway 38 near Malad will close for repairs for up to three weeks starting Sept. 19, with some work beginning next week. Detours will be posted and message boards will be in place to alert the public to the coming road closure.

Preliminary work at the crossings will consist of delivery of materials and prebuilding new rail track panels outside the roadway and will not cause full closures.

Crews will replace the concrete pads and rails to make the crossings smoother. New drains will also be installed to address ponding issues.

Traffic impacts from this project and others are always available at 511.idaho.gov

 

System Interchange weekend ramp closure begins tomorrow

Map showing System Interchange detour through Northgate

Beginning tomorrow at noon the eastbound Interstate 86 to southbound Interstate 15 ramp will be closed while crews construct a temporary road to the new eastbound to southbound ramp. Eastbound traffic on I-86 looking to travel south on I-15 will be detoured north through the Northgate Interchange (Exit 73). The closed ramp will reopen late Sunday.

This work will allow the eastbound lanes to be adjusted to the grade of the new ramp. Doing the work this weekend will limit traffic impacts during the peak Labor Day weekend.

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. The project is scheduled to be completed next summer.

Motorists should carefully follow 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 proceed safely through the work area.

Motorists are encouraged to use https://511.idaho.gov or the 511 app to keep track of project detours. Project details are available here on ITD’s projects website —https://itdprojects.idaho.gov/pages/i-86i-15-system-interchange

Multiyear construction begins next week to widen I-15 between the Northgate and Fort Hall interchanges

Photograph of I-15 and the Northgate Interchange

The Idaho Transportation Department (ITD) is beginning construction to widen Interstate 15 (I-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:

Traffic patterns change at System Interchange

aerial view of I-86/I-15 system interchange

Beginning this morning, traffic patterns are changing at the System Interchange in Pocatello. Traffic using the southbound entrance ramp from Northgate can now merge with the new southbound alignment and will no longer be detoured through the Interstate 86 Chubbuck Exit before returning to Interstate 15.

In addition, southbound I-15 traffic wishing to travel west on I-86 will now drive over the new Chubbuck bridge before exiting to the right.

Motorists are encouraged to keep up-to-date via https://511.idaho.gov or the 511 app to keep track of project detours. Project details are available here on ITD’s projects website —https://itdprojects.idaho.gov/pages/i-86i-15-system-interchange