District 3 – Southwest Idaho
- Overview
- News
- Construction
- Planning & Design
- Right-of-Way Permits
- Truck Routes
- Contacts
Overview
News
Nighttime closures Monday and Tuesday at the Karcher Interchange Bridge
November 14, 2025
ITD removes large steel sign structures to make room for new signs.
Read More
ITD begins 2 week project to resurface the Flying Wye starting Monday
November 14, 2025
ITD improves Flying Wye surface
Read More
Input sought on long-range planning for transportation in Idaho
November 10, 2025
Comments will inform the update to ITD’s Statewide Long-Range Transportation Plan, a federally required strategy document that is updated every five years and is used by the Idaho Transportation Board and planning staff as a guide to program future studies and projects.
Read More
Culvert repairs begin Nov. 13 on SH-45 in Nampa
November 6, 2025
ITD will begin repairing a culvert in Nampa.
Read More
New digital sign on SH-55 to improve communication
November 6, 2025
ITD improves SH-55 communication with new digital sign installation.
Read More
Nighttime closures begin this weekend on Franklin Road near I-84
November 3, 2025
ITD advises motorists to prepare for nighttime closures over the next month on Franklin Road between Star and McDermott roads.
Read More
SH-16 to fully close this weekend between SH-44 and US-20/26
October 31, 2025
SH-16 will be fully closed south of SH-44 the weekend of Nov. 7-10.
Read More
ITD helps county snowplow operators prepare for winter
October 31, 2025
Ada County Highway District and Boise County Road and Bridge snowplow drivers heading into their first winter got to prepare...
Read More
Nighttime I-84 eastbound closures at Gowen Interchange Sunday night for bridge repairs
October 29, 2025
ITD will close eastbound I-84 before Exit 57 nightly from 7:30 p.m. to 4 a.m. Sunday through early Wednesday.
Read More
District 3 covers just under 22,000 square miles of southwest Idaho and maintains 2,647 lane miles and 399 bridges. District 3 encompasses the 10 southwest counties, the most roads and bridges of all the districts, and nearly 40 percent of the state’s population.






The Idaho Transportation Department (ITD) is studying long-term improvements to Idaho 44 from West State Street in Eagle to Interstate 84 in Caldwell.
The Idaho Transportation Department (ITD) is studying Idaho 55 to identify current and future needs throughout the corridor. The study will result in three corridor plans (North, Central, South) that identifies policies and projects important to the development of this major arterial over the next 20 years.