ITD conducted a detailed traffic analysis of I-84 in 2018. ITD analyzed whether or not a new interchange would be needed along I-84 between Nampa and Caldwell. The analysis concluded widening I-84 and improving interchanges at Karcher/Midland (in Nampa) and Franklin Road (in Caldwell) will serve the needs of traffic beyond the design year 2045.
ITD is replacing the Ustick Road Overpass and Notus Canal bridge.
Replacing the overpass will allow additional lanes to be built on I-84. Construction on the overpass began in May 2021 and expected to be completed by early 2022. The overpass is part of ITD's improvements to I-84 in Caldwell.