Interstate 184 Idaho
Interstate 184 is the Boise Connector, a freeway spur east from I-84/U.S. 30 to the Boise city center. With as many as eight overall lanes, I-184 connects with a retail strip anchored by Boise Towne Square mall at Franklin Road and with U.S. 20/26 at the south end of Garden City. U.S. 20/26 extends the freeway 1.1 miles east from I-184 across the Boise River to the arterial couplet of Front and Myrtle Streets through Downtown Boise.
Source: December 31, 2021 Interstate Route Log and Finders List
I-184 Annual Average Daily Traffic (AADT)
Source: 2018 AADT – Annual Average Daily Travel Application – Idaho Transportation Department (ITD)
The Boise Connector appeared on planning maps since the 1960s. The freeway opened east from Interstate 80N in December 1968.1 It was approved as Interstate 180 by the American Association of State Highway Officials (AASHO) on June 30, 1970. Idaho Official Maps and various state maps printed in the 1970s showed I-180 as Interstate 180N in the 1970s, referencing Interstate 80N, the designation of I-84 prior to 1980. The American Association of State Highway and Transportation Officials (AASHTO) approved the renumbering of I-180 to Interstate 184 on October 13, 1979. The conversion of I-80N to I-84 was completed by July 1980. During this time period, Interstate 184 in Boise was also briefly signed as Business Loop I-84. Running along side U.S. 20 and U.S. 26 for a portion of its length, the business route was ultimately eliminated to reduce duplicative designations.
The viaduct system along the Boise Connector east from U.S. 20/26 (Chinden Boulevard) and the Boise River to Downtown was completed in August 1992. A $86 million project redesigned the interchange, “The Flying Wye” at the western end of I-184 between February 1999 and September 2004. Construction replaced a three-wye interchange with left side ramps with a multi level exchange. A three lane flyover was built from I-84 east to I-184 and separate ramps were added to and from Franklin Street to remove weaving traffic.1,2
East End – Boise, Idaho
West End – Boise, Idaho
West End Throwback
Previous guide signs at the west end of I-184 used Ontario and Twin Falls for Interstate 84. 08/31/06
- “Rebuilding the WYE interchange.” Idaho Statesman (Boise), February 7, 1999.
- “Speeds will return to normal near Wye.” Idaho Statesman(Boise), September 5, 2004.
Page updated August 28, 2019.