Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS access control event polyline feature class identifies the degree to which access to a roadway facility is controlled or limited. It reflects how entry and exit points are managed along roadway segments, which directly impacts traffic flow, safety, and operational characteristics. Each segment is categorized into one of three levels of access control: full, partial, or none. Full access control allows entry only through grade-separated interchanges; partial access control permits some at-grade intersections or driveways; and no access control allows unrestricted property access and frequent intersections. This dataset is used for functional classification, design evaluation, access management, and network performance modeling. It supports transportation planners, engineers, and researchers in assessing corridor functionality and system efficiency. The data is maintained and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and is verified against roadway design records and the official state highway network. Users should note that access control classifications represent the current operational status of the roadway and may change over time as corridors are upgraded or reclassified. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS base thickness event polyline feature class represents the thickness of the lowest pavement layer, commonly referred to as the base course, beneath the surface layer of the roadway. This information is collected and maintained as part of the HPMS inventory to support structural design, performance modeling, and pavement condition assessment. The base thickness attribute indicates the compacted depth of granular, stabilized, or treated material placed directly on the subgrade to provide load distribution and structural support. Thickness values are typically expressed in inches and derived from design plans, as built documentation, or pavement management system records. This dataset is used by engineers, planners, and researchers for evaluating pavement structure adequacy, forecasting maintenance needs, and analyzing the relationship between pavement design and performance. It is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and reflects current data available from pavement inventory systems and design records. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS base type event polyline feature class represents the material composition of the base course layer located between the pavement surface and the subgrade. This information is collected and maintained as part of ITD’s HPMS inventory to support structural design, performance modeling, and pavement management analysis. The base type attribute describes the construction material used in the base layer, indicating whether it consists of untreated aggregate, stabilized material, asphaltic concrete, lean concrete, or fractured Portland Cement Concrete (PCC). These classifications help assess pavement strength, drainage, and performance characteristics. This dataset is used by engineers, planners, and researchers to evaluate pavement structure adequacy, forecast maintenance needs, and analyze relationships between pavement material types and performance outcomes. It is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and reflects current data available from pavement inventory systems, construction records, and design documentation. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS capacity event polyline feature class represents the estimated hourly traffic volume that a roadway segment can carry under normal operating conditions. These values are assigned using HPMS methodologies and reflect roadway characteristics such as facility type, number of lanes, terrain, and functional classification. The layer is used by planners, analysts, and engineers to evaluate system performance, identify potential congestion, and support statewide federal reporting requirements. Capacity data originates from ITD roadway inventory records and Highway Performance Monitoring System (HPMS) annual submittals to the Federal Highway Administration (FHWA). Values are reviewed each reporting cycle to ensure alignment with current roadway conditions and federal guidance. This layer is intended to help users understand roadway performance limitations and support informed decision making. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS curves event polyline feature class identifies and describes the curved sections of roadways across the state. Each record shows where a curve begins and ends, how long it is, how tight the turn is, and whether it bends to the left or right.Understanding roadway curves helps engineers and planners design safer roads, evaluate crash risks, and plan improvements. The information is maintained and updated as part of ITD’s annual Highway Performance Monitoring System (HPMS) submission to the Federal Highway Administration (FHWA). The dataset reflects current roadway geometry information from Idaho’s statewide mapping and inventory systems.These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS facility type event polyline feature class identifies the operational design of each roadway segment, specifying whether it carries one-way or two-way traffic, functions as a ramp or non-mainline connector, or represents a non-inventory direction. Facility type classification allows for consistent network modeling and analysis of roadway characteristics within the HPMS framework.Data is derived from roadway inventory records, design documentation, and traffic operations information maintained as part of ITD’s Highway Performance Monitoring System (HPMS) reporting process to the Federal Highway Administration (FHWA). This information ensures alignment between ITD’s internal roadway data systems and federal reporting standards.The dataset is used by engineers, planners, and analysts to evaluate traffic operations, verify roadway function within the network, and maintain consistency between state and federal roadway classifications. Facility type values are reviewed and updated annually to reflect the current roadway configuration.These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS faulting event polyline feature class represents the difference in elevation between adjacent concrete slabs at transverse joints on rigid pavements. Faulting occurs when one slab edge settles or rises relative to the next, typically due to load transfer inefficiency or erosion beneath the pavement. This measurement helps assess ride quality, structural condition, and pavement serviceability. Data is collected through field measurements or automated pavement condition surveys and is reported as the average fault height per slab joint in inches. Faulting data is used by engineers, pavement managers, and analysts to evaluate performance trends, identify maintenance needs, and model the progression of joint distress. It is maintained as part of ITD’s Highway Performance Monitoring System (HPMS) submittal process to the Federal Highway Administration (FHWA) and updated annually from the pavement condition inventory. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS grade event polyline feature class represents the longitudinal slope, or steepness, of a roadway segment. Grade is a key geometric characteristic that influences vehicle performance, fuel consumption, drainage, and roadway safety. It is expressed as a percentage based on the rise or fall in elevation over a given horizontal distance. Grade information is derived from roadway centerline geometry, design plans, and digital elevation data maintained in ITD’s roadway inventory and HPMS systems. Both upgrade (positive) and downgrade (negative) values are recorded to indicate direction of slope relative to increasing route mile point. This dataset is used by engineers, planners, and safety analysts to evaluate roadway performance, assess design compliance, and identify locations where steep grades may affect vehicle operations or maintenance needs. Grade data is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) reporting to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS lane width event polyline feature class represents the measured or designated width of a single travel lane within a roadway segment, expressed in feet. Lane width is a critical design element that influences roadway capacity, vehicle operating speed, and overall safety performance. Values are obtained from roadway design plans, construction records, and pavement inventory systems maintained as part of ITD’s Highway Performance Monitoring System (HPMS) data collection and reporting process to the Federal Highway Administration (FHWA). Both rural and urban lane widths are recorded to support design consistency, maintenance planning, and performance monitoring. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS last overlay event polyline feature class identifies the compacted depth of the most recent pavement layer placed over an existing roadway surface during an overlay or resurfacing project. This value reflects the thickness of new asphalt or Portland Cement Concrete (PCC) material added to restore structural integrity, ride quality, and service life. Thickness data is derived from project construction documentation, pavement design plans, and ITD’s pavement management systems. For asphalt overlays, thickness represents the compacted depth of new hot mix asphalt placed on the existing pavement. For concrete overlays, it represents the finished depth of the new concrete layer above the previous surface. This dataset is used by engineers, pavement managers, and analysts to evaluate the structural adequacy of resurfaced pavements, estimate remaining service life, and support performance modeling. It also assists in determining maintenance timing, comparing design versus constructed conditions, and verifying consistency with HPMS data submissions to the Federal Highway Administration (FHWA). Updates occur annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal cycle using the most current pavement project and inventory information. These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS median event polyline feature class identifies the type of median separating opposing lanes of traffic along divided highways. Medians improve safety and operations by reducing head-on collisions, minimizing interference from opposing traffic, and providing space for recovery, emergency stops, and potential future lanes. This information is collected from roadway design plans, construction as-built documents, and ITD’s roadway inventory systems in accordance with FHWA HPMS Field Manual coding guidance. Each median is classified by physical type and barrier characteristics. Medians may include unprotected areas, curbed separators, or positive barriers that prevent vehicle crossover. Optional sub-codes describe the rigidity of barrier types (flexible, semi-rigid, or rigid) when that level of detail is available. The dataset supports roadway safety evaluation, network inventory, and performance reporting. It is maintained and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submission to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS Off-Highway (OH) speed limits event polyline feature class represents the legally posted regulatory speed limit for each roadway segment included in the HPMS inventory. This attribute indicates the maximum lawful vehicle speed under ideal driving conditions, as displayed on official roadside signs. Speed limit values are expressed in miles per hour (mph) and reflect the prevailing posted speed along each segment. When different speed limits apply to different directions or vehicle classes, the value recorded represents the primary posted limit for passenger vehicles in the predominant direction of travel. This dataset is used by engineers, planners, and safety analysts to evaluate roadway performance, design consistency, and risk exposure. It also supports federal reporting, crash rate normalization, and statewide transportation modeling. The speed limit data is maintained and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS ownership event polyline feature class represents the legal owner of each roadway segment in the HPMS inventory. Ownership defines which governmental or organizational entity holds jurisdictional title to the roadway right-of-way or facility. Ownership may differ from the entity responsible for maintenance or operation. For example, a roadway may be owned by the state but maintained by a county or local agency under agreement. When more than one entity has ownership interest, the code reflects the entity holding the primary title. This dataset supports jurisdictional classification, funding eligibility, and federal reporting and is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS parking event polyline feature class represents the existence and characteristics of on-street parking along roadway segments, including whether parking is permitted during peak traffic periods and the total parking lane width. The peak parking attribute indicates whether parking is allowed during the peak traffic period and, if so, on which side(s) of the roadway. It helps identify time-based restrictions that affect roadway capacity and traffic flow. The parking width attribute measures the total width of designated parking lanes, expressed in feet, and includes the sum of widths on both sides of the roadway where applicable. This information supports roadway cross-section design, performance modeling, and right-of-way utilization studies. Parking information is derived from field inventories, local parking ordinances, and roadway design records. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS passing sight event polyline feature class identifies the proportion of each sample section where adequate sight distance exists for safe vehicle passing in the inventory direction. This measure reflects geometric and topographic roadway characteristics that affect driver visibility and passing opportunity. Values represent the percentage of total section length that meets or exceeds FHWA-defined minimum passing sight-distance criteria for the prevailing design speed. The dataset is used in safety evaluations, highway investment modeling, and roadway performance analyses. It is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS pavement event polyline feature class represents physical condition indicators collected along Idaho’s state and local federal-aid roadway network. It includes surface roughness, rut depth, cracking, and joint faulting measurements used to evaluate pavement ride quality and structural health. Condition data are collected through automated pavement survey vehicles and processed in accordance with FHWA HPMS data item definitions. These indicators help assess pavement performance trends, support State of Good Repair analysis, and inform resurfacing and reconstruction programming. The dataset is maintained and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS peak lanes event polyline feature class represents the total number of through lanes available in the inventory direction during the peak travel period, while counter peak lanes capture the number of lanes open in the opposite (counter-peak) direction. These attributes help evaluate directional capacity, reversible lane operations, and congestion management strategies. The data are used by engineers, planners, and modelers to assess corridor performance, evaluate travel time reliability, and determine peak-hour operating characteristics. The dataset is reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS PSR event polyline feature class represents a numerical rating of pavement ride quality and surface condition based on field observation. The Present Serviceability Rating (PSR) scale ranges from 0.0 (very poor) to 5.0 (excellent) and reflects the ability of the pavement to serve the traveling public comfortably and safely. PSR is primarily used for unpaved or local road segments where automated roughness measurements (such as International Roughness Index (IRI)) are not available. Values are determined through visual inspection or windshield surveys using standardized rating criteria. This dataset supports HPMS performance reporting, trend analysis, and maintenance prioritization, and is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS section movement event polyline feature class identifies signalized and unsignalized intersection control features along roadway segments. These attributes describe signal type, timing characteristics, number of signals, stop control, and other at-grade traffic control devices that influence travel flow and operating conditions. The information is used by traffic engineers, planners, and modelers to assess corridor performance, determine capacity constraints, and support statewide transportation modeling and safety evaluation. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS shoulders event polyline feature class represents the physical and functional characteristics of roadway shoulders, including surface type and width for both the left and right sides of the roadway. Shoulder data provides important context for roadway cross-section design, vehicle recovery areas, maintenance needs, and overall safety performance. Data are collected from field inventories, roadway design plans, and pavement management systems to ensure consistency with HPMS reporting requirements. The dataset is reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS structure type event polyline feature class classifies roadway segments based on the presence of a major structure carrying or supporting the roadway. Structure types include bridges, tunnels, and causeways that influence roadway geometry, maintenance needs, and functional characteristics. The dataset ensures consistency between HPMS roadway data and the National Bridge Inventory (NBI) and supports structural reporting and asset management activities. It is reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
StructureType
(
type: esriFieldTypeSmallInteger, alias: Structure Type
, Coded Values:
[1: Section is a Bridge]
, [2: Section is a Tunnel]
, [3: Section is a Causeway]
)
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS surface type event polyline feature class classifies the material of the uppermost layer directly exposed to traffic. Surface type distinguishes among unpaved, bituminous, and concrete surfaces, as well as overlay configurations, providing key data for assessing pavement condition, structural integrity, and long-term performance. Surface type is a full-extent item for the National Highway System (NHS) and must be verified through visual inspection and construction records. Unpaved segments on the NHS are extremely rare and should be confirmed. The dataset is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS terrain type event polyline feature class classifies roadway segments according to the general topography of the surrounding landscape, which influences vehicle speed, design standards, and operational characteristics. Terrain type reflects the overall slope and grade of the roadway corridor, not isolated features. This dataset helps determine appropriate design criteria, such as horizontal and vertical alignment, and is used in performance modeling and cost estimation. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS thickness flexible event polyline feature class represents the combined compacted thickness of all flexible pavement layers constructed with asphaltic or bituminous materials. For flexible pavement structures, this includes all bound layers between the pavement surface and the top of the base course. The dataset supports pavement performance analysis, rehabilitation planning, and structural modeling in HPMS and related asset-management systems. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS thickness rigid event polyline feature class represents the compacted depth, in inches, of the Portland Cement Concrete (PCC) surface layer in a rigid pavement structure. For rigid pavements, the thickness includes all PCC layers that provide structural strength to the roadway, whether reinforced or unreinforced. This dataset supports pavement performance modeling, design verification, and condition forecasting. It is reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS through lanes event polyline feature class represents the number of lanes designated for through traffic movement in the inventory direction. Through lanes exclude auxiliary, turning, and parking lanes not intended for continuous travel. Associated attributes (through lanes source, ascending lanes, and descending lanes) provide supporting context for the origin of the data and direction-specific lane counts on grades. The dataset is used to evaluate roadway capacity, determine performance metrics, and support investment modeling. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS TOPS event polyline feature class defines the spatial and administrative characteristics of roadway sections selected as part of Idaho’s HPMS sample panel. Each record represents a specific roadway segment used for collecting detailed pavement, traffic, and geometric data for federal reporting. This dataset is maintained within the HPMS Sections Catalog and serves as the master reference for linking field-collected sample data to the statewide roadway network. The Table of Potential Samples (TOPS) ensures statistically representative sampling across functional systems and area types. The dataset includes attributes such as the reporting year, route identifier, begin and end measures, section length, and sample ID, along with optional comment fields for internal documentation. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS turn lanes event polyline feature class describes whether exclusive turn lanes are provided along a segment and the manner in which they are configured. These data help determine lane continuity, intersection control, and operational characteristics that influence capacity and performance. Turn lane data are collected through field inventories, design records, and roadway management databases and are reviewed annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS widening event polyline feature class describes the degree to which a roadway can be widened to accommodate additional lanes and identifies the presence of any constraints, such as natural, structural, or environmental obstacles. The widening potential attribute represents the estimated ability to widen the roadway on either side within the existing or potential right-of-way. The widening obstacle attribute identifies major limitations that could restrict or prevent widening, such as rivers, steep terrain, railroads, adjacent development, or environmental features. This dataset assists planners and engineers in evaluating corridor capacity expansion opportunities and in prioritizing projects for improvement. Data are reviewed and updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS year last construction event polyline feature class represents the calendar year when the latest major roadway construction activity was completed on a segment. Construction activities include new construction, reconstruction, major rehabilitation, resurfacing, or other substantial structural improvements that alter the pavement or cross-section. This attribute provides critical input for pavement condition modeling, deterioration rate calculations, and performance-based investment analyses. Data are derived from construction records, pavement management systems, and as-built documentation. The dataset is updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.
Description: The Idaho Transportation Department's (ITD) Roads and Highways Road Network Linear Referencing System (LRS) HPMS year last improvement event polyline feature class represents the calendar year when the latest roadway improvement, rehabilitation, or resurfacing activity was completed. Improvements include projects intended to extend pavement life, enhance structural capacity, or improve ride quality without full reconstruction. This dataset provides critical input for pavement deterioration modeling and lifecycle planning. It reflects the timing of the last substantive upgrade that improved the functional or structural performance of the roadway. Data are updated annually as part of ITD’s Highway Performance Monitoring System (HPMS) submittal to the Federal Highway Administration (FHWA). These are current "working" records. For the static, published data, please see the records stored at: https://www.fhwa.dot.gov/policyinformation/hpms.cfm
Service Item Id: 05ffc9faab084f28b9553d1e9fad4b69
Copyright Text: This dataset was developed and provided by the Idaho Transportation Department (ITD). Users should credit ITD as the original source when utilizing or referencing this information in maps, reports, or applications.