skip to main content
Idaho Official Government Website Contact Us
I-84 Karcher to Franklin Blvd

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.

Watch the latest time lapse video!
Sign up for text alerts
Text 84CORRIDOR to 47177
Manténgase Informado
Para más información y para recibir una hoja de inforamación, por favor llame 208-334-8567
Construction Update

I-84 Improvements in Nampa will wrap up this Spring!

Watch Amy Schroeder, ITD’s Transportation Program Manager discuss the latest news on I-84 Corridor in Canyon County.

Sign up for text updates!

I-84 Projects in Canyon County

Work on I-84 is in multiple stages of design and construction. Construction in 2020 and 2021 will include:

  • Adding a third lane in each direction of I-84.
  • Adding auxiliary lanes in each direction of I-84 between interchanges.
  • Replacing the Northside Interchange with a Single Point Urban Interchange for safer, more efficient travel.
  • Widening the eastbound off-ramp at the Franklin Boulevard Interchange and modifying signals to allow two left-turn lanes onto the westbound on-ramp.
  • Replacing the Middleton Road Overpass.
  • Replacing the Ustick Road Overpass.

Design plans  are also underway for I-84 between Franklin Road in Caldwell and Karcher/Midland.

What to expect during construction

  • All lanes of I-84 will be open during the day.
  • One lane may be closed at night in each direction of I-84.
    • Eastbound lane restrictions will be in place from 10 p.m. to 5 a.m. on weekdays and from 10 p.m. to 7 a.m. on weekends.
    • Westbound lane restrictions will continue until 6 a.m. on weekdays and until 7 a.m. on weekends.
  • Traffic will be shifted around the work zone from week to week.
  • Temporary traffic signals will be in place at on-and-off ramps at the Karcher/Midland Interchange and Northside Boulevard interchange.
  • Occasional nighttime restrictions may be scheduled on interchange ramps,
  • Northside Boulevard will be open during the day.

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

Northside Boulevard Construction

Construction on Northside Boulevard has begun and crews have demolished the outside lanes of the Northside bridge. Construction will continue until 2021.

ITD will close the eastside of Northside Boulevard to allow construction crews to begin working on improvements.

What to expect during construction:

  • Northside Boulevard will be open during the day.
  • Lane closures will occur at night from 10 p.m. until 5 a.m. on week days and until 7 a.m. on weekends.
  • Traffic will be using the east side of Northside Boulevard as crews construct improvements on the west side.
  • Two rounds of 14-day closures will be necessary before the project is complete. More information to come.
  • Temporary traffic signals will be in place at the on and off-ramps of the interchange.
  • Work may be noisy at night due to backup alarms and large equipment.

Northside Boulevard Interchange - SPUI

The interchange at Northside Boulevard will be replaced with a Single Point Urban Interchange to accommodate more traffic and reduce delays.

A SPUI, or Single-Point Urban Interchange is traffic configuration controlled by a central traffic signal underneath I-84 will direct all turning movements from a single point.

Construction Progress Video

Click hereto 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

I-84 Photo Gallery

Project map

© Copyright 2021 Idaho Transportation Department Visit ITD Website

Comment Form

Default Project Comment Form
Maximum upload size: 8MB
Maximum upload size: 52.43MB

Signup Form