Construction to improve the I-84 South Jerome Interchange (Exit 168) begins

Stormy day over the South Jerome Interchange on I-84

The Idaho Transportation Department (ITD) is beginning construction on Feb. 12 to replace the South Jerome Interchange on I-84 (Exit 168). This multi-year project includes upgrading the current interchange, installing new traffic signals, adding a sidewalk and bike lane to the Lincoln Avenue Bridges and improving local roads.

In 2024, crews will begin improvements to Bob Barton Road, East Frontage Road North and Lincoln Avenue. Flagging is expected to occur on Bob Barton Road the week of Feb. 12 so crews can begin irrigation work, and the road will close for approximately three months starting in early March so it can be repaved. East Frontage Road North will also be closed in late February.

During the rest of 2024, crews will build temporary eastbound and westbound off-ramps, which will be used when constructing the permanent off-ramps. Work will also begin on the new bridges, the eastbound off-ramp and the westbound on-ramp.

During construction, motorists should expect:

  • Most work will occur Monday – Saturday from 6 a.m. to 8 p.m.
  • Intermittent nighttime closures on I-84 will be necessary for bridge work, girder placement and traffic shifts.
  • Traffic shifts and ramp changes will occur.
  • Road closures will occur on Lincoln Avenue, Bob Barton Road and East Frontage Road North in March. Detours will be in place.
  • Speed limits will be reduced.

The South Jerome Interchange was originally built in 1966 and has reached the end of its design life. The new interchange will increase capacity and improve safety on the interchange to serve South-central Idaho for years to come.

Construction is anticipated to be completed in 2026. To sign up for project updates:

Western Construction, Inc. is the contractor for this $54.4 million project.