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The Idaho Transportation Department is reconstructing and widening I-84 between the Karcher/Midland and Franklin Boulevard interchanges in Nampa.

El Departamento de Transportación de Idaho está reconstruyendo y ampliando la autopista I-84 entre los intercambios de Karcher/Midland y Franklin Boulevard en Nampa.

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Construction will be completed in 2021
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Para más información y para recibir una hoja de inforamación, por favor llame 208-334-8567
Construction Update

I-84 Projects in Canyon County

Work on I-84 is in multiple stages of design and construction. Construction in 2019 and 2020 will include:

Design plans and an  environmental study are also underway for I-84 between Caldwell and Karcher/Midland.

What to expect during construction

Want a behind the scenes look? Watch our latest Facebook Live video.

Construction Progress Video

Click below to see a time lapse video view of the changes taking place during the I-84 widening project.

Check back for regular updates.

Time lapse video

Project map

Downloads & Resources

Fact SheetsAsset 4
January 2019 Open HouseAsset 4
June 2018 Open House Asset 4
I-84 Corridor FundingAsset 4
Asset 5
March 6, 2020

Eastbound I-84 closure at Northside Blvd. Exit 35 Friday, March 6 from 12 a.m. to 4 a.m.

ITD will implement a short term overnight closure on Friday, March 6 at 12 a.m. until 4 a.m.

Eastbound I-84 traffic will be detoured off the interstate at the Northside Blvd. Exit 35.
Traffic can use the interchange's on-ramp to re-enter eastbound I-84. Travel will remain open on Northside Boulevard.

This closure will allows crews to safely perform roadway maintenance on I-84.

Detour map
Asset 5
Friday, Jan. 31 and Saturday, Feb. 1

Northside Boulevard Overnight Closures

Northside Boulevard will be closed overnight under I-84 Friday, Jan. 31 and Saturday, Feb. 1 while crews place six steel girders for the I-84, Northside Interchange in Nampa.

Girders are the horizontal beams that will support the new bridge. Six girders will be set, weighing over 800,000 lbs.

Learn More
Asset 5
Friday, Dec. 13

The Idaho Transportation Department is launching a safety patrol and courtesy towing service on Friday, December 13 to assist disabled vehicles and keep traffic moving safely through the Interstate 84 construction zone in Nampa.

The Safety Service Patrol will operate Monday-Friday during the morning and evening commutes:

5 a.m. to 9 a.m. between the Karcher/Midland and Garrity interchanges, and
3 p.m. to 7 p.m. between the Ten Mile and Karcher/Midland interchanges.

Disabled cars, trucks or motorcycles will be towed to the Jacksons parking lot near the Franklin Boulevard Interchange (1407 N. Franklin Blvd.). Motorists will be responsible to arrange to retrieve their vehicles within 24 hours.

Although the Safety Service Patrol will be out actively searching for disabled vehicles, drivers can still call 911 or *ISP in an emergency.

For more information, click here.
Asset 5
November 4 2019

Northside Blvd lane restrictions begin Monday, Nov. 4.

Lane restrictions will begin on Monday, Nov. 4 , at Northside Boulevard in Nampa.
The restrictions are in place as Intermountain Gas relocates pipes. The utility relocations are in preparation of ITD's replacement of the Northside Interchange project.

Here's what you can expect:
> One southbound lane open from Karcher Road to the I-84 ramps.
> Both northbound lanes will remain open.
> The closure will be in place all day.
> Pipe relocation will take approximately one week. Northside Blvd lane restrictions begin Monday, Nov. 4.

Asset 5
August 4 2019

New traffic pattern on westbound I-84 at Franklin Blvd exit.

On August 4, the Idaho Transportation Department will reconfigure lanes near the Franklin Boulevard Interchange.

In the new configuration, the left lane will no longer merge and will remain a travel lane. The far right lane will end, becoming an off-ramp to Franklin Blvd. View a map of the new traffic pattern.

The new configuration will keep two travel lanes open on I-84 during construction in Canyon County.

View a map
Asset 5

Karcher/Midland westbound off-ramp closed overnight Friday, July 26.

The off-ramp will be closed at 10 p.m. and will re-open at 7 a.m.Motorists traveling west to Karcher Rd/Midland Blvd will need to exit I-84 early at Northside Blvd and follow the posted detour signs.

Download a detour map for details.
Asset 5
July 8 2019

I-84 widening begins in Nampa

Construction began on July 8 between the Karcher/Midland and Northside interchanges. Construction will begin on July 15 between the Northside and Franklin Boulevard interchanges.

I-84 widening will begin July 8 in Nampa
Asset 5
March 2019

Karcher Overpass Construction

Construction began on the Karcher Road Overpass in March 2019.

Karcher Road Overpass Fact Sheet
Asset 5
Jan 22, 23

January 2019 Open House

ITD held public open houses to present current plans to improve I-84 in Canyon County.

Asset 5
November 18

Shoulder widening complete

The Idaho Transportation Department completed widening the shoulders on Interstate 84, clearing the way for major construction in 2019.

Asset 5
June 2018

Community Open House #2

ITD presented project plans and construction sequencing for review and comment.

Open House Displays Open House Maps
Asset 5
December 2017

Community Workshop #1

ITD held the first community workshop to present design plans and gather comments.

Workshop #1 Summary Workshop #1 PowerPoint
Asset 5
Fall 2017

Project Kick-off

ITD began design plans for I-84 widening.


ITD’s Public Information Officer, Jake Melder provides an update on the I-84 construction project, and ITD’s approach to the COVID-19 pandemic.

Click here for the video.

Transportation is an essential service during this pandemic. It is critical that we have a reliable highway network to keep goods and services moving. Connecting you with healthcare providers, and making sure your grocery stores can restock daily, are some of our state’s highest priorities.

At this time, construction is continuing. I-84 is an important corridor and we are committed to delivering these essential services. All lanes of I-84 are open during the day. No road closures on I-84 are currently planned. We will continue to monitor the situation and make changes as needed.

The COVID-19 pandemic has created a dynamic, ever-evolving situation for all of us . We will continue to monitor and make changes to ensure we can safely conduct our essential work. Even now, we are committed to our Mission: “Your Safety. Your Mobility. Your Economic Opportunity.”

Thank you. Stay healthy, stay well, and wash your hands!

Extended single-lane closures

As a result of the statewide stay-home order, ITD will extend single-lane closures on I-84 during the weekdays for construction. Decreased traffic volumes provide crews with additional opportunities to work in the corridor.

What to expect:

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