Who Owns Your Road? ITD, Counties, Cities and Idaho's Highway Districts

Call the wrong office about a pothole in Idaho and you will be told, politely, that the road is not theirs. The city says the street belongs to the highway district. The highway district says the road is a state highway. The state says the road past the trailhead is a Forest Service road. The Forest Service says the last mile is a private easement. Each answer can be correct, and the patchwork is not an accident. It comes from more than a century of state laws that let counties, cities and voters create separate road agencies, and from the fact that the federal government manages most of Idaho's land.

This first lesson maps that patchwork. It explains who owns and maintains each kind of road in Idaho, what legal powers each owner has, and how to find out, for any road, which agency answers for it. The later lessons in this course follow the money (Lesson 2), the constitutional rules on highway funds (Lesson 3), the state's plans and budgets, and the practical steps for getting a road fixed or a project changed. All of them start with the same question: whose road is it?

Facts in this lesson are current as of October 2026. Mileage figures come from the most recent federal and state inventories available at that date, which run one to two years behind. Where a number could have changed, the text says where to check the current figure.

Four public road systems, set by statute

The starting point is a single sentence in Idaho law. Idaho Code 40-201 says there shall be a system of state highways, a system of county highways in each county, a system of highways in each highway district and a system of highways in each city, "except as otherwise provided." The same section puts a duty on the state, counties, cities and highway districts to improve and maintain the highways within their jurisdiction "within the limits of the funds available." That last phrase is why a road agency can admit a road is its responsibility and still say it cannot afford to fix it this year.

In Idaho law the word "highway" covers far more than a four-lane road. A gravel county road, a residential street and an alley can all be "highways" in the statutes. When this course says "road," it means the same thing.

On top of the four statutory public systems sit three more kinds of owners: federal land agencies (the Forest Service, the Bureau of Land Management, the National Park Service and others), Idaho's five federally recognized tribes on their reservations, and private owners, from a single landowner's driveway to a subdivision road association. Figure 1 shows how Idaho's roughly 59,000 miles of public roads divide among owners in the most recent federal count.

Two things stand out. First, the state highway system is small by length: under 5,000 centerline miles, or about one mile in twelve. It carries a large share of traffic, but most of the road mileage in Idaho belongs to someone else. Second, the federal government owns or manages nearly 16,000 miles of roads that are not part of any state or local system, most of them Forest Service and BLM roads in the backcountry. Those roads follow different rules, which this lesson covers below.

The state highway system and ITD

The Idaho Transportation Department builds, maintains and operates the interstates, U.S. highways and state highways. It also registers vehicles, licenses drivers and runs the state's aeronautics program. A seven-member Idaho Transportation Board sits on top. According to a 2018 Legislative Services Office orientation paper, the governor appoints the members with Senate confirmation; six members represent the six transportation districts and serve six-year terms, and the chair represents the state at large. The board hires a director to run the department day to day.

The board's control over state highways is exclusive, even where a state highway runs through a city or a highway district. Idaho Code 40-1310 gives highway districts broad power over their own roads, then adds that where a highway within a district has been designated a state highway, the state board has exclusive supervision over its designation, location, maintenance, repair and reconstruction. In practice that means a city's main street can be a state highway. The city may own the sidewalks, the street trees and the side streets, while ITD owns the travel lanes and decides about signals and lane changes on them. Cooperative agreements between ITD and local agencies sometimes divide those duties more finely, so the only reliable answer for a specific block is to check.

The six ITD districts

ITD divides the state into six districts, each with its own engineer and maintenance crews. The district office is where most project questions, maintenance requests and local coordination happen. ITD's district offices guide describes them as follows (as of October 2026):

District	Region	Counties	Lane miles and bridges (as ITD reports them)
1	North Idaho	Benewah, Bonner, Boundary, Kootenai, Shoshone	1,472 lane miles, 279 bridges
2	North-central Idaho	Clearwater, Idaho, Latah, Lewis, Nez Perce	1,500 lane miles, 180 bridges
3	Southwest Idaho	Ada, Adams, Boise, Canyon, Elmore, Gem, Owyhee, Payette, Valley, Washington	"40 percent of the state's lane miles"; serves nearly half of Idaho's population
4	South-central Idaho	Blaine, Camas, Cassia, Gooding, Jerome, Lincoln, Minidoka, Twin Falls	2,321 lane miles, 290 bridges
5	Southeast Idaho	Bannock, Bear Lake, Bingham, Caribou, Franklin, Oneida, Power	1,900 lane miles, 315 bridges
6	East Idaho	Bonneville, Butte, Clark, Custer, Fremont, Jefferson, Lemhi, Madison, Teton	nearly 2,500 lane miles

The district counts add up to all 44 counties. ITD's page gives District 3's size as a percentage rather than a number, and the figures on that page were written at different times, so do not add them up to get a statewide total. For a statewide count, use FHWA's tables or ITD's annual report. A lane mile is one mile of one travel lane, so a mile of four-lane interstate counts as four lane miles. That is why lane miles run far higher than the centerline miles in Figure 1.

The local road owners: 285 local highway jurisdictions

Everything public that is not a state highway or a federal or tribal road belongs to a local highway jurisdiction. The Local Highway Technical Assistance Council (LHTAC), a state-created agency that serves local road owners, counts 285 of them in its FY2025 annual report: 189 cities, 33 counties and 63 highway districts. LHTAC was created in 1994 under Idaho Code 40-2401. Its nine voting council members are appointed in equal thirds by the Association of Idaho Cities, the Idaho Association of Counties and the Idaho Association of Highway Districts, and the statute says it is not under ITD's management control. LHTAC administers federal and state grant programs for local roads, trains local road crews and keeps maps of who serves where.

County road departments

In 33 counties, the board of county commissioners is the road authority for rural roads outside cities and outside any highway district. The county commissioners adopt the official county highway map, set road standards, levy the road and bridge property tax, accept or reject new roads from developers and hire a road supervisor or public works director. The legal powers of a county over its own system mirror those of a highway district; the difference is that the same three commissioners also run the jail, the courthouse and the rest of county government, so roads compete with everything else in one budget.

Some counties split the work. Cassia County, for example, maintains about 93 miles itself while six highway districts (Albion, Burley, Murtaugh, Oakley, Raft River and a sliver of Twin Falls Highway District) maintain the rest of the county's rural roads, according to ITD's 2022 rural mileage report. In 11 counties the county maintains no roads at all because highway districts cover every inch: Ada, Canyon, Elmore, Jerome, Kootenai, Latah, Lewis, Lincoln, Minidoka, Power and Twin Falls are marked that way in the same report.

Highway districts: Idaho's special road governments

A highway district is a separate local government whose only job is roads. Idaho has used them for more than a century, and they are rarer in other states. The current law is Title 40, Chapter 13 of the Idaho Code. The key features:

• A separate body corporate. Section 40-1301 validates all highway districts "as now organized" and continues them as public corporations. A district owns property, sues and is sued, hires staff and signs contracts in its own name.
• Three elected commissioners. Section 40-1303 sets three commissioners per district and bars county commissioners, city mayors and city council members from serving at the same time. Under section 40-1305, commissioners serve four-year terms and each is elected districtwide, even though the district is divided into subdistricts for residency. Election dates and candidate filing rules are in the sections that follow; Lesson 6 covers them.
• Exclusive control of their roads. Section 40-1310 gives the commissioners "exclusive general supervision and jurisdiction" over all highways and public rights-of-way within their system, with power to build, maintain, repair, buy and improve them, set speed and regulatory signs, buy right-of-way and, if needed, condemn land.
• Broad powers, read broadly. Section 40-1312 tells courts to construe a district's powers "liberally" as a broad grant of power.
• Taxing power. Districts levy property taxes for roads and bridges under Idaho Code 40-801 and receive a share of state fuel tax and registration money. Lesson 2 explains both.

Districts vary enormously in size. ITD's 2022 report lists Idaho County with a dozen small districts (Cottonwood, Deer Creek, Doumecq, Fenn, Ferdinand, Grangeville, Greencreek, Keuterville, Kidder-Harris, Union-Independent, White Bird and Winona among them), several maintaining fewer than 100 miles. At the other end, Twin Falls Highway District maintains more than 750 rural miles. Kootenai County is covered by four districts: Post Falls, Lakes Highway District No. 2, Eastside Highway District No. 3 and Worley Highway District No. 4. Canyon County is covered by Canyon Highway District No. 4, Golden Gate, Nampa and Notus-Parma highway districts.

When a highway district includes a city, Idaho Code 40-1323 extends the district's taxing power to property inside the city and lets city residents vote in district elections. Whether the city or the district maintains the streets inside city limits depends on local history and agreements, and that is where the confusion usually starts. The Idaho Supreme Court set a limit on those arrangements in City of Sandpoint v. Independent Highway District, 161 Idaho 121, 384 P.3d 368 (2016). Sandpoint and the Independent Highway District had signed a joint powers agreement in 2003 that gave the city control of its streets while the district handed over the property taxes it collected inside the city. The court held the agreement void: a highway district can share work with a city by agreement, but it cannot hand over its whole statutory duty to maintain roads in its jurisdiction, because the joint powers statute says no agreement relieves an agency of a duty imposed by law. The lesson for residents is that a city-district deal you read about in a news story may not be the legal last word on who is responsible.

The countywide highway district: ACHD

A different chapter of law, Title 40, Chapter 14, allows a single countywide highway district. Under section 40-1401, county voters decide whether "this county be served by one county-wide highway district for all city highways and county secondary highways." The commissioners can put the question on the ballot, and must if 10 percent of the voters in each county commissioner subdistrict ask in writing.

Once voters say yes, the law is sweeping. Section 40-1406 makes the countywide district responsible for "all county secondary and city highways," says no city in the county may maintain city streets or levy property tax for them, and bars any other highway district in the county from maintaining roads. Cities keep only small roles, such as caring for trees and plantings in the right-of-way. The countywide district can pass ordinances, but each one takes a two-thirds vote of the full commission. A 2018 Legislative Services Office paper described the Ada County Highway District as the only countywide district; check the LHTAC jurisdiction map for any change since.

That is why, in Boise, Meridian, Eagle, Kuna, Star and Garden City, the city council cannot fix your street. ACHD can. It is also why ACHD's decisions on things like lane counts, bike lanes and roundabouts often become city political fights: the city's land use plans and ACHD's road plans have to fit together, but two separately elected boards make them.

The 2026 Legislature changed how ACHD's commissioners are chosen. Senate Bill 1356 (Session Law Chapter 333, signed April 10, 2026) makes countywide highway district elections partisan and countywide, like county commissioner elections, starting with the 2028 cycle. ACHD races were already on the November general election ballot; the change adds the May partisan primary and has every voter in the county vote on every seat. According to the bill's statement of purpose, candidates will have to live in the district they represent, will run countywide, will file for the even-year May primary and will face the general election in November. The bill passed the Senate 19-16 and the House 47-20. Supporters said it put the elections on the "broadest possible basis"; the close Senate vote shows lawmakers were divided. Lesson 6 covers highway district elections in detail.

City streets

Outside Ada County, most cities maintain their own streets. Idaho Code 40-1333 makes cities with city highway systems responsible for building and maintaining them, and allows a city to contract with a county, a highway district or the state for the work, as long as the city pays fairly for it. The city council is the road authority; the public works or streets department does the work. Cities get a share of state highway user money based on population (Lesson 2), can levy property taxes within the state's budget limits and can charge development impact fees for growth-related road projects (Lesson 8).

Some small cities sit inside a highway district and let the district maintain city streets under an agreement. Others keep their own crews. The arrangement can change, so check the current agreement before you assume.

Roads on federal land

Federal agencies manage about 62 percent of Idaho's land (61.9 percent in the Congressional Research Service's federal land ownership data, as compiled by Ballotpedia; the underlying figures date to 2018 or earlier), much of it national forest and BLM range, so many of the roads Idahoans drive to hunt, fish, log or reach a cabin are federal. FHWA's 2024 count in Figure 1 shows 15,907 miles of federal agency roads in Idaho that are not part of any state or local system. The agency that manages the land usually builds and maintains the road to its own standards. A Forest Service road can be closed seasonally, gated, decommissioned or rebuilt through that agency's travel management planning, and comments on those decisions go to the national forest or BLM field office, not to the county.

Two kinds of federal and local overlap matter for residents:

• Historic public rights-of-way across federal land. Before 1976, a federal law known as Revised Statute 2477 granted rights-of-way for highways across unreserved public land. Idaho's law on these is Idaho Code 40-204A. It says the state recognizes such rights-of-way once construction and first use accepted the grant, that they can be abandoned only through eminent domain with compensation, and that they must be documented as existing before the grant was withdrawn in 1976. The statute also says these rights-of-way carry no duty to maintain them for vehicles; they are traveled "at the risk of the user." Anyone wanting one recognized as part of a county or highway district system has to go through the 40-203A validation process described below.
• Federal money for local roads that serve federal land. The Federal Lands Access Program, created in 23 U.S.C. 204, pays for improvements to roads that provide access to, are next to, or are inside federal lands, with an emphasis on high-use recreation sites and economic generators. FHWA's program page says each state has a programming decision committee that issues calls for projects. A county road to a busy trailhead may be eligible. Lesson 7 covers federal programs.

Tribal roads

Idaho has five federally recognized tribes: the Coeur d'Alene Tribe, the Kootenai Tribe of Idaho, the Nez Perce Tribe, the Shoshone-Bannock Tribes and the Shoshone-Paiute Tribes, all of which sit on the Idaho Council on Indian Affairs. Roads on a reservation can belong to the tribe, the Bureau of Indian Affairs, the state (a state highway that crosses the reservation), a county or a highway district, depending on history and land status. The federal Tribal Transportation Program funds roads that provide access to and within reservations and Indian lands, allocated among tribes by a statutory formula based on population, road mileage and prior shares.

Jurisdiction questions on reservations are complicated by the checkerboard pattern of tribal, trust, allotted and fee land. Idaho law even addresses tribal status in the fuel tax: Idaho Code 63-2402(6) spells out how the motor fuel tax works when a distributor or retailer is a tribe or tribal member exempt from the tax under federal law. For a road question on a reservation, start with the tribe's transportation or public works department and the county, and ask which agency's inventory lists the road.

Private roads and road associations

A large share of rural Idahoans live on private roads: subdivision roads that were never accepted by the county or highway district, shared driveways, ranch roads with recorded easements and roads in planned communities run by a homeowners association. No public agency has a duty to plow, grade or repair them. The owners, usually through an easement agreement, road maintenance agreement, covenants (CC&Rs) or an association, decide how to share costs. If the agreement is silent or there is no agreement, neighbors often end up negotiating, or in court.

Three practical points:

• Check the plat and the official map. When land is subdivided, the recorded plat shows whether roads were dedicated to the public or kept private, and the local subdivision ordinance (see Course 36, Lesson 5) sets the standards a road must meet before a county or district will accept it. Counties and highway districts adopt an official highway system map under Idaho Code 40-202; if your road is not on it, assume it is not maintained by the public until proven otherwise.
• Public use alone does not make a public road. Section 40-202(3) says highways include roads laid out and recorded by order of the commissioners, and "all highways used for a period of five (5) years, provided they shall have been worked and kept up at the expense of the public." Both parts matter: public travel plus public maintenance. A road the neighbors have driven for decades but nobody public ever graded is not automatically public.
• Getting a private road accepted costs money. Agencies generally require the road be brought up to current standards (width, base, drainage, sometimes paving) before they take on maintenance forever. Ask for the written acceptance policy before you organize the neighbors.

Public right-of-way, validation and abandonment

Ownership disputes in rural Idaho are often not about who maintains a road but whether a road is public at all. A landowner gates an old county road; hunters say it has been public for a century. A subdivision plat shows a right-of-way that was never built. A survey from 1910 is lost. Idaho law gives a specific administrative tool for these cases: validation.

Under Idaho Code 40-203A, any resident or property holder in a county or highway district system (including the state, a state subdivision or a federal agency) may petition the board of county or highway district commissioners, whichever has jurisdiction, to validate a highway or public right-of-way, including one that furnishes public access to state and federal public lands and waters. The commissioners can also start the process on their own. The petitioner pays a reasonable fee set by the commissioners. Validation is available when:

• through omission or defect, doubt exists about the legal establishment of the road;
• the location cannot be accurately determined because of many alterations, a defective survey, or a lost or destroyed original survey; or
• the road as traveled does not generally match the location on the official map or in the public records.

The commissioners must follow the procedure for abandonment and vacation in section 40-203: order a survey if needed, have a report prepared, set a hearing, give notice and take testimony from anyone with an interest. They then decide whether validating the road is in the public interest and enter an order declaring it public or not public. Anyone eligible to petition may appeal to district court under section 40-208. A validated road is recorded and added to the official map.

Validation has limits that surprise people. Section 40-202(4) says that when a public right-of-way is created or validated, there is no duty to maintain it and no liability for failing to maintain it. Winning a validation can keep a road open to the public without obligating anyone to grade it.

The Idaho Supreme Court has backed the validation tool. LHTAC's legal article "The Virtues of Validation" summarizes Richel Family Trust v. Worley Highway District, decided July 22, 2020, in which the court described section 40-203A as a distinct mechanism that lets a highway district evaluate whether a right-of-way was previously established and remove doubt about it, considering all information, including evidence outside the original records. The opinion is Idaho Supreme Court Docket No. 46172, filed July 22, 2020; search that docket number on Justia or the Idaho Supreme Court opinions page. (This lesson has not confirmed the reporter citation for Richel; look it up before citing it in a legal filing.)

The opposite process is abandonment or vacation under section 40-203: the commissioners can remove a road from the public system after notice and a hearing. Neighbors who want a gated road reopened and neighbors who want a road closed both end up at the same commission meeting, so learn the procedure either way.

Tools for finding the owner of any road

Several free public tools answer the ownership question. None is perfect on its own, so use two.

• ITD's GIS gallery. ITD's GIS Maps and Data page links to a map of Idaho's highway system, a milepost log for highways, traffic counts and Idaho's Local Road Inventory of county and city roads. The Local Road Inventory map service includes layers for road status, surface type, local highway jurisdiction and highway district boundaries.
• LHTAC's maps. LHTAC's maps page offers a downloadable statewide map of the local jurisdictions it serves, an interactive bridge map built from the National Bridge Inventory, a small-structure map, a crash map and a link to ITD's general web map showing functional classification and federal-aid routes.
• Idaho 511. Idaho 511 shows closures, construction and conditions on state highways and some local routes. If a closure is listed there, it usually names the responsible agency.
• County GIS and the assessor. Most counties publish a parcel viewer. Parcel lines, recorded plats and road names there tell you whether a road is inside a public right-of-way or crosses private parcels.
• Highway district and county official maps. Each county road department and highway district keeps an official highway system map adopted under section 40-202. Ask for it by name; it is a public record (see Course 47).
• ITD's local mileage reports. ITD's Local Highway Distribution Fund page posts yearly rural road mileage by county and highway district. These certified "improved miles" also drive part of the state money each local agency receives, so the same list shows who claims which roads.

Why the patchwork matters for advocates

The layered system has defenders and critics, and both have real arguments. Defenders say small highway districts keep road decisions close to the people who drive the roads, that elected road-only commissioners are easier to hold accountable than a county board juggling many duties, and that districts can tax and plan for roads without competing with jails and courts. Critics, including some legislators and local officials over the years, argue that dozens of tiny districts duplicate equipment and overhead, that boundaries no longer match how people live and commute, and that the split between city land use authority and highway district road authority, sharpest in Ada County, makes planning harder. Consolidation proposals surface periodically; Lesson 6 looks at them.

For an advocate or candidate, the practical consequence is that each road decision has a specific owner with a specific elected board, budget hearing and records custodian. Effective requests go to that owner. Testimony delivered to the wrong body, however good, is lost.

Where this fits in the rest of the course

This lesson identified the owners. The next lessons follow the money and the decisions:

• Lesson 2: Where Road Money Comes From explains fuel taxes, registration fees, sales tax transfers and property taxes, and traces a gallon of gas from pump to pavement.
• Lesson 3: The Constitution's Highway Fund Wall and the 2025 Budget Fight covers Article VII, section 17 and the April 2025 Senate vote.
• Lesson 4: TECM, GARVEE Bonds and the Strategic Initiatives Fund and Lesson 5: Reading ITD's Seven-Year Plan cover state project funding and planning.
• Lesson 6: Highway Districts Up Close covers elections, levies and budgets in depth.
• Lesson 7: Federal Money, Lesson 8: Growth Pays for Growth?, Lesson 9: How To Get a Road Fixed and Lesson 10: How To Report on a Road Project complete the course.

Related courses on this site:

• Course 26: Local Government, especially the budget cycle and levies and bonds.
• Course 36: Idaho Planning and Zoning, including subdivisions and impact fees.
• Course 34: Idaho Open Meetings for highway district and county commission meetings.
• Course 47: Idaho Public Records Requests for official maps, agreements and road files.
• Course 49: Testifying and Public Comment and Course 48: Running for Local Office, including highway district commissioner races.
• The Idaho Constitution course and, for elected officials, Conducting Public Meetings.