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District 3

District 3 – Southwest Idaho


Southwest Idaho

d3_rainbowbridge267x200District 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.

District headquarters is in Boise located in Ada County, where Caleb Lakey is the District Administrator. Julie DeLorenzo, of Boise, has represented District 3 on the Idaho Transportation Board since March 2012.

District 3 Contact Information
District 3 Phone: 208-334-8300
District 3 Fax: 208-334-8917
Address: 8150 Chinden Boulevard
Boise, ID 83714-1367
Julie DeLorenzo
Julie DeLorenzo
Board Member
Caleb Lakey
Caleb Lakey P.E.

D-3 News

Work begins to repave State Highway 55 in Valley County

September 12, 2022
The project will focus on repaving a six-mile stretch of highway south of Cascade, repairing cracks, potholes, and overall uneven surfaces caused by weather, usage, and age.
Read More

Work to repave Eagle Road begins August 29

August 29, 2022
All work will take place at night over two construction seasons. Work this year includes repaving Eagle Road from Overland Road to Franklin Road, and repaving the intersections of McMillan Road, Ustick Road, Fairview Avenue, and Franklin Road.
Read More

Early construction activities begin on new State Highway 16 extension

July 21, 2022
The new extension will run north to south between U.S. Highway 20/26 and Interstate 84, west of McDermott Road along the border of Ada and Canyon counties.
Read More

Interstate 84 restrictions on Sunday, July 10 for organized motorcycle ride

July 8, 2022
Law enforcement will reduce speeds and temporarily block access to eastbound I-84 between Nampa and Mountain Home for the Idaho Patriot Thunder motorcycle ride. Up to 1,200 motorcyclists are expected to participate in the annual event.
Read More

ITD shares future plans for State Highway 55 and I-84, Karcher Interchange at Nampa open house July 7

July 6, 2022
Community members may stop by an in-person open house on Thursday, July 7 between 5 and 7 p.m. at Nampa Christian School. Online open houses for each project will also be available July 7-14.
Read More

Repaving work begins Monday, June 27 on State Highway 45 between Walters Ferry and Nampa

June 24, 2022
Construction plans include replacing the bridge deck at Mora Canal, resurfacing the pavement, and widening the turning radius on SH-45 at Missouri Avenue and Patterson Avenue.
Read More

State Highway 55 and Banks-Lowman Road summer flagging schedule

June 17, 2022
ITD will deploy flaggers on the eight weekends expected to have the highest number of travelers due to local events and holidays.
Read More

I-84 expansion will require extended ramp closures at Franklin Road Interchange in Caldwell this summer

June 13, 2022
Between June and September, each of the ramps will close for six weeks to allow crews to rebuild the ramps and connect them to new lanes on I-84.
Read More

Construction underway on State Highway 21 widening project in Boise

May 18, 2022
Planned improvements include a new center turn lane, wider shoulders, and dedicated right turn lanes at major intersections.
Read More


Highway Construction in Southwest Idaho Button

For ITD construction projects & map locations go to:

For current construction & traffic conditions go to:

Learn all about transportation topics by listening to the: Drive Idaho Podcast

Planning & Design

Projects in Planning or Design Phases

For more information on ITD project plans & map locations go to:

I-84 Project Corridors

US Routes

State Highways | Idaho Routes


Study Information

The purpose of the U.S. 20/26 Corridor Study is to develop a medium range (through 2020) plan that identifies current and future highway needs for more than 14 miles of U.S. 20/26 running from I-84 near Caldwell west to Nyssa, Oregon and the Snake River. The highway overlaps U.S. 95 for eight miles from east of Parma to Anderson Corner Road – the corridor study for that section is addressed in the ongoing U.S. 95 Corridor Study. The Corridor Study is being done to comply with Idaho Transportation Department Board policy, which is also consistent with federal planning guidance. The study and subsequent adopted plan will be used to chart U.S. 20/26 road improvements from I-84 to the state line in the Statewide Transportation Improvement Program (STIP).


The completed plan will include:

  • A 10-year plan for the corridor.
  • Identification of corridor priorities.
  • Identification of existing and projected environmental, roadway, and land use conditions.
  • Analysis of future travel demand and performance in the corridor.
  • Analysis of accidents and recommendation of safety features including access management.
Design Guidelines

Sample urban and rural cross-sections of the highway will be illustrated. Any projected capacity improvements that require a cross-section different from the current samples will also be illustrated.

Features will include:

  • Number of lanes
  • Lane width
  • Shoulder width
  • Side slopes
  • Curb, gutter, and sidewalks for urban cross-sections
Environmental Review

The National Environmental Policy Act (NEPA) requires that an environmental review be completed before right-of-way can be acquired with federal funds. The U.S. 20/26 Corridor Study is not programmed to recommend or fund purchase of right-of-way. Therefore, ITD will not complete a NEPA-level environmental review. However, an Environmental Scan will be conducted to provide a baseline survey which includes a qualitative analysis of the current human environment. The human environment includes aspects of the natural environment, built environment, and human health. Constraints that may have a limiting factor in roadway width and placement of the highway section will also be identified.

Study Background

U.S. 20/26 is a major farm-to-market road serving agriculture and quarrying industries in western Canyon County. Cross-state access is directly provided to Nyssa and connecting access is provided via Highway 18 to Adrian, Oregon. The majority of the highway is two-lane rural with a 65 mph speed limit.


Mark Wasdahl, ITD Project Manager
(208) 334-8344 –

The Idaho Transportation Department (ITD) is studying U.S. 95 from the Idaho border in Owyhee County to Pinehurst at the Adams / Idaho County line. The study will result in a corridor plan that identifies important improvement projects over the next 20 years.

The plan will be published in three parts:

  • North: Weiser River to New Meadows
  • Central: Nyssa Junction with 20/26 to Weiser River
  • South: Oregon State Line to Nyssa Junction with 20/26

U.S. 95 runs north to south through western Idaho. It provides an important north-south international transportation link for long-haul freight between Mexico and Canada.

Within the Idaho Transportation Department’s District 3 boundaries, the highway covers 203 miles from Pinehurst in Adams County to the Oregon stateline south of Marsing in Owyhee County. Recreational travelers and local traffic share the road with long-haul trucks, straining the roadway capacity as surface transportation demand continues to grow.

Project Description

The completed corridor plan will include an analysis of the existing conditions on the highway; a forecast of future demand over the next 20 years; and a list of short and long-term improvements on how to improve transportation on this section of U.S. 95. The document will address the course of the highway as a whole and on a county by county basis. The plan will be based on community input, engineering analysis, and city, county and agency visions for the future. ITD will include the plan in its Idaho Horizons Long Range Capital Improvement and Preservation Program (LRCIP). LRCIP is a planning document that helps ITD prioritize projects for future years.

The finished corridor plan will address:

  • Safety: What are the improvements that will make U.S. 95 safer for motorists, pedestrians and residents?
  • Access Management: How can ITD and local communities manage the effect of development along the corridor so the roadway continues to function safely and efficiently?
  • Traffic: Can we anticipate congestion points and plan for the best ways to improve traffic flow and capacity throughout the corridor?
  • Environment: What are the important environmental issues to consider when ITD seeks to make improvement to U.S. 95 in the future?
U.S. 95 North Corridor Study

· U.S. 95 North Environmental Scan

U.S. 95 Central Corridor Study

· U.S. 95 Central Environmental Scan

U.S. 95 South Corridor Study

· U.S. 95 South Environmental Scan

The Idaho Transportation Department (ITD) is studying long-term improvements to Idaho 44 from West State Street in Eagle to Interstate 84 in Caldwell.

This study will result in:

  • A corridor plan with recommended transportation improvements and the needed right-of-way (land) to support these improvements between now and 2045.
  • A Federal Highway Administration (FHWA) Environmental Assessment that outlines how the improvements would impact the environment (i.e., noise, air quality, historic properties, etc.) and how ITD will address the impacts.
  • A project phasing plan that identifies and prioritizes individual projects for future funding.

Environmental Process
The FHWA Environmental Assessment (EA) for this project includes several technical studies that address traffic, access management, drainage, noise, air quality, public involvement and other factors. The EA must be approved by the Federal Highway Administration prior to final design and construction. A public hearing will be held in 2019 before the EA is submitted to FHWA.

Project Background and Schedule

Idaho 44 is the only east-west highway that links Canyon County to Ada County north of the Boise River. As growth and development have increased, ITD is taking a comprehensive approach to address travel time, capacity and safety along this corridor.

Early planning efforts for ID-44 began in 2004 and resulted in a preferred alignment for approximately 16 miles of the corridor. A preferred alignment identifies locations for widening or realigning the roadway in future years. The ID-44 public outreach was a significant component of this early planning process.

ITD’s goal is to complete the ID-44 corridor study in 2019 and immediately begin moving forward with improvements. Public meetings will be scheduled in Ada and Canyon counties later this year.

Questions or comments about the ID-44 corridor study may be directed to Mark Wasdahl, ITD Project Manager, at or (208) 334-8344.

ID 55 RouteThe 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.

Project Description
The Idaho 55 highway corridor originates 1.7 miles south of Marsing in Owyhee County at the Idaho/Oregon/Nevada junction with U.S. 95 and serves six counties, ending at the junction of U.S. 95 in New Meadows. Most travelers know the highway for its turns along mountain forests, whitewater rapids and favorite recreation spots. The corridor is an important route that supports the regional daily commute, the long-haul trucking industry and recreational traffic.

The completed study will include three separate corridor plans:

  • South Corridor Plan – ION Junction in Owyhee County to Interstate 84 in Canyon County
  • Central Corridor Plan – State Street in Ada County to Banks Lowman Road in Boise County
  • North Corridor Plan – Banks Lowman Road in Boise County to New Meadows in Adams County

Project Materials
North Corridor Plan – January 2016 Meetings

Study Documents
North Corridor Plan

Draft Central Corridor Plan

South Corridor Plan

Idaho 55, Marsing to Nampa Access Management Plan

Accessibility | Title VI | Americans with Disabilities Act (ADA) Compliance

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age, or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through the impacts of its programs, policies, and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.

TTY/TDD Users: Dial 711 or (800) 377-3529 to use Idaho Relay System

Right-of-Way Permits

**NEW** Right-of-Way Online Permit Tool

Encroachment information & permitting resources all in one online location

  • Outlines the ITD permitting process for all different types of Encroachment
  • *NEW* Digital online permit forms
    • Plus direct links to ITD forms in PDF format
  • Online Payment Portals for each ITD District Office

Check it out: Right-of-Way Online Permit Tool

In addition to filling out the online or PDF forms, you will need to:

  • Include plans or drawings with your completed application form
  • Contact ITD for roadway alignment & highway project details
  • Also include signed & approved traffic control plans
  • If there are structures, include standard drawings or shop plans
  • Sign your application & submit with completed packet | Allow 30 business days for processing
  • After application is approved, contact ITD Maintenance Foreman at least five days prior to installation for start date approval.

Resources: Encroachment, Utility & Other Permits

This table contains resources & process details for requests involving Idaho highway right of way. For additional questions, see the “District Submittal” contacts below.

Permits Quick LinksResourcesNotices | FAQs
Idaho Parcels
Milepoint Logs
iPlan – Mapping tool for Idaho highway route information
IDAPA 39.03.42 - Governing Rules
ROW Permit Quick Reference Guide | District 3
Access Management Information
DIG-Line | 811 - Contacts & rules for safe digging
ITD Manuals & Guidance - Complete list
ROW Permit FAQs (PDF)
Traffic Impact Study (TIS) FAQs (PDF)

District Submittal Locations & Contacts

Regional LocationsOffice HoursContact Info & Email Counties
North Idaho | Dist. 1
600 W. Prairie Ave
Coeur d’Alene, ID 83815
7:00 a.m. to 4:00 p.m.
Pacific Time
Email: D1permits@itd.idaho.govCounties: Benewah, Bonner, Boundary, Kootenai, Shoshone - Phone: 208-772-1297
North-Central Idaho | Dist. 2
2600 Frontage Rd
Lewiston, ID 83501
7:00 a.m. to 4:00 p.m.
Pacific Time
Email: Shane.Niemela@itd.idaho.govCounties: Clearwater, Idaho, Latah, Lewis, Nez Perce - Shane Niemela, 208-799-4239
Southwest Idaho | Dist. 3
8150 Chinden Blvd
Boise, ID 83714
8:00 a.m. to 5:00 p.m. Mountain Time
Payments are not accepted after 3 p.m.
Payment Phone Line:
208-334-8300, Ext. 2

Approach & Commercial Permits:
Josh Nopens, 208-332-7190

Utility, Special Event & Other Encroachment Permits: Shona Tonkin, 208-334-8341
Counties: Ada, Adams, Boise, Canyon, Elmore, Gem, Owyhee, Payette, Washington, Valley
South-Central Idaho | Dist. 4
216 S. Date St.
Shoshone, ID 83352
8:00 a.m. to 5:00 p.m. Mountain TimeEmail: Deb.Pierson@itd.idaho.govCounties: Blaine, Camas, Cassia, Gooding, Jerome, Lincoln, Minidoka, Twin Falls - Deb Pierson, 208-886-7839
Southeast Idaho | Dist. 5
5151 S. 5th Ave
Pocatello, ID 83204
8:00 a.m. to 5:00 p.m. Mountain TimeEmail: D5EncroachmentPermits@itd.idaho.govCounties: Bannock, Bear Lake, Bingham, Caribou, Franklin, Oneida, Power - Phone: 208-239-3300
East Idaho | Dist. 6
206 N. Yellowstone
Rigby, ID 83442
8:00 a.m. to 5:00 p.m. Mountain TimeEmail: JR.Grotjohn@itd.idaho.govCounties: Bonneville, Butte, Clark, Custer, Fremont, Jefferson, Lemhi, Teton, Madison - JR Grotjohn, 208-745-5625

Roadway Sign Request Contacts

Truck Routes

DMV Ports of Entry, Freight Maps & Trip Permits

For all Motor Carrier Trucking Route Maps in Idaho go to the ITRPS website at:

Then click “Helpful Links” in the top left corner of the banner to access maps & attachments for the following:

  • Idaho Maps for Approved Routes Up to 129,000 lbs. (129K)
  • 129K State Route Maps (by District/Region)
  • County Maps for Special Permit & Requirements
  • Vertical Clearance Maps | Pilot/Escort Requirements
  • Route Capacity Maps
  • Route Capacity Maps (by Color)


Idaho Transportation Department, District 3 Office
Address: 8150 Chinden Boulevard, Boise, ID 83714-1367

District 3 Phone: 208-334-8300
District 3 Fax: 208-334-8917

Accessibility | Title VI | Americans with Disabilities Act (ADA) Compliance

The Idaho Transportation Department (ITD) is committed to compliance with Title VI of the Civil Rights Act of 1964 and all related regulations and directives. ITD assures that no person shall on the grounds of race, color, national origin, gender, age, or disability be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any ITD service, program, or activity. The department also assures that every effort will be made to prevent discrimination through the impacts of its programs, policies, and activities on minority and low-income populations. In addition, the department will take reasonable steps to provide meaningful access to services for persons with Limited English Proficiency.

TTY/TDD Users: Dial 711 or (800) 377-3529 to use Idaho Relay System