Nighttime I-84 closures will begin Sunday (Oct. 15) in Nampa for SH-16 construction

The Idaho Transportation Department advises motorists to plan ahead for nighttime Interstate 84 closures starting this Sunday (Oct. 15) between the Garrity (Exit 38) and Ten Mile (Exit 42) interchanges. Crews are preparing the interstate for the next stage of construction at the future State Highway 16/I-84 interchange.

A full westbound closure and several nights of multiple lane closures on westbound I-84 will take place in the following weeks.

Oct. 15:

  • Westbound I-84 will be closed between Garrity (Exit 38) and Ten Mile (Exit 42) interchanges from 10 p.m. (Oct. 15) to 5 a.m. Monday (Oct. 16). Motorists will be detoured to Franklin Road. View the detour map.

Oct. 11-24:

  • Two of four lanes on westbound I-84 will close beginning Wednesday (Oct. 11) between the Garrity (Exit 38) and Ten Mile (Exit 42) interchanges. Work will occur between 10 p.m. and 5 a.m. each night. The speed limit will be reduced to 45 mph at night.

Eastbound I-84 closures will be scheduled later this month.

During the closures, crews will shift and re-stripe the I-84 travel lanes away from the center median. The shift will make room to build a center pier supporting the new I-84/SH-16 interchange. All work is weather dependent as striping can be less effective during cold nighttime temperatures. To request updates text HIGHWAY16 to 1-866-483-8422.

ITD wants to remind you to slow down, pay attention and drive engaged.

For more information about the State Highway 16 project visit You can also contact ITD at and (208) 334-8008.