The National Bridge Inventory dataset is as of June 27, 2024 from the Federal Highway Administration (FHWA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The data describes more than 615,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal and Tribal lands. The inventory data present a complete picture of the _location, description, classification, and general condition data for each bridge. The element data present a breakdown of the condition of each structural and bridge management element for each bridge on the National Highway System (NHS). The Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges contains a detailed description of each data element including coding instructions and attribute definitions. The Coding Guide is available at: https://doi.org/10.21949/1519105.

Bridges are inspected every two years at minimum; bridges in poor condition are inspected more frequently. These inspections rate the conditions of various bridge elements. The inspection records are stored in a bridge management system. The Federal Highway Administration annually collects data on bridges more than 20 feet long from each state’s department of transportation, including the Pennsylvania Department of Transportation and New Jersey Department of Transportation, and stores it in their National Bridge Inventory.

This analysis considers a bridge's deck, super, and substructure ratings, or the culvert rating for a culvert. A score between 0 and 9 is given for each component. Bridges with scores between 7 to 9 for all three components are rated "good," those with any component scores of 4 or lower are rated "poor." A bridge that doesn't fall into a good or poor rating is considered “fair”.

Most bridges are on state roads and are maintained by the state’s department of transportation. Some bridges are on local roads and are maintained by local governments. The "Other" category covers bridges maintained by turnpike and toll authorities.

Bridges-Rail in the United States According to The National Bridge Inspection Standards published in the Code of Federal Regulations (23 CFR 650.3), a bridge is: A structure including supports erected over a depression or an obstruction, such as water, highway, or railway, and having a track or passageway for carrying traffic or other moving loads. Each bridge was captured as a point which was placed in the center of the "main span" (highest and longest span). For bridges that cross navigable waterways, this was typically the part of the bridge over the navigation channel. If no "main span" was discernable using the imagery sources available, or if multiple non contiguous main spans were discernable, the point was placed in the center of the overall structure. Bridges that are sourced from the National Bridge Inventory (NBI) that cross state boundaries are an exception. Bridges that cross state boundaries are represented in the NBI by two records. The points for the two records have been located so as to be within the state indicated by the NBI's [STATE_CODE] attribute. In some cases, following these rules did not place the point at the location at which the bridge crosses what the user may judge as the most important feature intersected. For example, a given bridge may be many miles long, crossing nothing more than low lying ground for most of its length but crossing a major interstate at its far end. Due to the fact that bridges are often high narrow structures crossing depressions that may or may not be too narrow to be represented in the DEM used to orthorectify a given source of imagery, alignment with ortho imagery is highly variable. In particular, apparent bridge location in ortho imagery is highly dependent on collection angle. During verification, TechniGraphics used imagery from the following sources: NGA HSIP 133 City, State or Local; NAIP; DOQQ imagery. In cases where "bridge sway" or "tall structure lean" was evident, TGS attempted to compensate for these factors when capturing the bridge location. For instances in which the bridge was not visible in imagery, it was captured using topographic maps at the intersection of the water and rail line. TGS processed 784 entities previously with the HSIP Bridges-Roads (STRAHNET Option - HSIP 133 Cities and Gulf Coast). These entities were added into this dataset after processing. No entities were included in this dataset for American Samoa, Guam, Hawaii, the Commonwealth of the Northern Mariana Islands, or the Virgin Islands because there are no main line railways in these areas. At the request of NGA, text fields in this dataset have been set to all upper case to facilitate consistent database engine search results. At the request of NGA, leading and trailing spaces were trimmed from all text fields. At the request of NGA, all diacritics (e.g., the German umlaut or the Spanish tilde) have been replaced with their closest equivalent English character to facilitate use with database systems that may not support diacritics. The currentness of this dataset is given by the publication date which is 09/02/2009. A more precise measure of currentness cannot be provided since this is dependent on the NBI and the source of imagery used during processing.

The NBI is a collection of information (database) describing the more than 600,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal lands. It presents a State by State summary analysis of the number, location, and general condition of highway bridges within each State.

The NBI is a collection of information (database) describing the more than 600,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal lands. It presents a State by State summary analysis of the number, location, and general condition of highway bridges within each State.

This file contains location and identification information for bridges in Oregon. This includes bridges owned by the state, cities, counties, and other owners such as railroad bridges that cross state highways. It does not include bridges that are owned by Federal agencies. A bridge is a structure including supports erected over a depression or an obstruction, such as water, highway, or railway, and having a track or passageway for carrying traffic or other moving loads and having an opening measured along the center of the roadway of more than 20 feet.

The Railroad Bridges dataset was compiled on October 14, 2022 from the Federal Railroad Administration (FRA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). A railroad bridge is defined as â Railroad bridge means any structure with a deck, regardless of length, which supports one or more railroad tracks, or any other undergrade structure with an individual span length of 10 feet or more located at such a depth that it is affected by live loads.â based on the Code of Federal Regulations (49 CFR Part 237). The FRA does not have a mandate to inspect railroad bridges: these inspections are required by the owner of the track. The FRA will use this railroad bridge dataset to determine the number of bridges per railroad, state, etc. and will assist in determining priority field activities.

The National Bridge Inventory (NBI) is a collection of information (database) describing the more than 615,000 of the Nation's bridges located on public roads as of December 31, 2020, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal and Tribal lands. The inventory data present a complete picture of the location, description, classification, and general condition data for each bridge. Element condition data for bridges on the National Highway System (NHS) are contained in a separate layer. Bridges found to be located outside their respective state have been reassigned to coordinates 0, 0. Element condition data are contained in a separate layer.

The bridge inventory data was obtained from Caltrans Structure Maintenance and Investigations (SM&I) Database as of 05/08/2020. SM&I performs bridge inspections in accordance with federal regulations on over 13,201 State Highway bridges and approximately 13,332 bridges owned by local government agencies. Caltrans bridge inspectors are responsible for maintaining the safety and integrity of over 26000 bridges owned by the State of California and California's local government agencies. For more information, please see Caltrans Division of Maintenance, Structure Maintenance & Investigation (SM&I) website at http://www.dot.ca.gov/hq/structur/strmaint/

[Metadata] National Bridge Inventory for Hawaii as of December 2020. This dataset is a subset of the National Bridge Inventory (NBI), which is a collection of information (database) describing the more than 615,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal and Tribal lands. The inventory data present a complete picture of the location, description, classification, and general condition data for each bridge. Hawaii bridges downloaded by Hawaii Statewide GIS Program on 5/21/21 from the Federal HIghways Administration (https://www.fhwa.dot.gov/bridge/nbi/ascii2020.cfm). For more information, please see metadata at https://files.hawaii.gov/dbedt/op/gis/data/bridges_nbi.pdf or https://files.hawaii.gov/dbedt/op/gis/data/bridges_nbi.html contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, Hi. 96804; (808) 587-2846; email: gis@hawaii.gov; Website: https://planning.hawaii.gov/gis.

Content

New York State inspectors assess all of the bridges every two years including a bridge’s individual parts. Bridges are analyzed for their capacity to carry vehicular loads. Inspectors are required to evaluate, assign a condition score, and document the condition of up to 47 structural elements, including rating 25 components of each span of a bridge, in addition to general components common to all bridges. The NYSDOT condition rating scale ranges from 1 to 7, with 7 being in new condition and a rating of 5 or greater considered as good conditionBridges that cannot safely carry heavy vehicles, such as some tractor trailers, are posted with weight limits. Based upon inspection and load capacity analysis, any bridge deemed unsafe gets closed.

Context

This is a dataset hosted by the State of New York. The state has an open data platform found here and they update their information according the amount of data that is brought in. Explore New York State using Kaggle and all of the data sources available through the State of New York organization page!

• Update Frequency: This dataset is updated annually.

Acknowledgements

This dataset is maintained using Socrata's API and Kaggle's API. Socrata has assisted countless organizations with hosting their open data and has been an integral part of the process of bringing more data to the public.

Cover photo by Ben Dumond on Unsplash
Unsplash Images are distributed under a unique Unsplash License.

This inventory of Detroit pedestrian bridges and their condition assessments is derived from the Michigan Department of Transportation (MDOT) and includes pedestrian bridges that span State of Michigan roadways only.Inspections of pedestrian bridges over State of Michigan routes are performed on a risk-based interval by MDOT, not to exceed 24 months. While not governed by the National Bridge Inspection Standards, these inspections are performed to maintain safety of the traveled way and to provide information needed for asset management. Routine Inspections of the entire structure may be supplemented by Special Inspections of Bridge Components that require more frequent monitoring. Condition ratings for pedestrian bridges are evaluated following the National Bridge Inventory Condition Ratings in a similar manner to vehicle bridges. These ratings are based on a 0-9 scale, where 0 is "Failed condition" and 9, "Excellent condition". Condition ratings are assigned for the deck, superstructure and substructure of each bridge or for each culvert. A culvert is a structure that allows passage under a roadway and has a short span (less than 20 feet).

The bridge inventory data was obtained from Caltrans Structure Maintenance and Investigations (SM&I) Database as of 05/08/2020. SM&I performs bridge inspections in accordance with federal regulations on over 13,201 State Highway bridges and approximately 13,332 bridges owned by local government agencies. Caltrans bridge inspectors are responsible for maintaining the safety and integrity of over 26000 bridges owned by the State of California and California's local government agencies. For more information, please see Caltrans Division of Maintenance, Structure Maintenance & Investigation (SM&I) website at https://www.dot.ca.gov/hq/structur/strmaint/CalTrans GIS Data

The NBI (NTAD 2015) is a collection of information (database) describing the more than 610,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal lands. It presents a State by State summary analysis of the number, location, and general condition of highway bridges within each State. Please note: 11,168 records in this database were geocoded to latitude and logtitude of 0,0 due to lack of location information or errors in the reported locations.

Data in the NBI is used to meet legislative reporting requirements and provide bridge owners, the Federal Highway Administration (FHWA) and the general public with information on the number and condition of the Nation’s bridges.The National Bridge Inventory dataset is as of June 27, 2024 from the Federal Highway Administration (FHWA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). The data describes more than 615,000 of the Nation's bridges located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible bridges on Federal and Tribal lands. The inventory data present a complete picture of the location, description, classification, and general condition data for each bridge. The element data present a breakdown of the condition of each structural and bridge management element for each bridge on the National Highway System (NHS). The Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges contains a detailed description of each data element including coding instructions and attribute definitions. The Coding Guide is available at: https://doi.org/10.21949/1519105.

Like all infrastructure, bridges and structures require ongoing maintenance. Regular inspections help the City ensure that its bridges and structures are well maintained and are in a state of good repair. The bridge structure dataset provides information about bridges and structures managed by the City of Toronto, the Province of Ontario-Ministry of Transportation (MTO), Toronto Transit Commission (TTC) and Metrolinx (MX). The dataset is limited to the City of Toronto geographical boundary. The structures included in this dataset are bridges with a span of three metres or more, culverts with an opening of three metres or more and the elevated section of the F.G. Gardiner Expressway. Information is updated annually after each inspection cycle every two years. By clicking a bridge or structure location on the map, you are able to obtain information about the bridge or structure including the location, usage, age, year of last inspection, inspection results and next inspection year of the bridge or structure. Bridges or structures that are not identified on the map are likely managed by other parties than the ones listed above. The dataset also includes locations of some privately managed bridges, Canadian National Railway (CNR) bridges and Canadian Pacific Railway (CPR) bridges. MTO, TTC, MX, CNR, CPR and private owners follow their own inspection routines to maintain their bridges in a state of good repair. Information on those bridges and structures is provided by their owners and has not been verified for its currency, completeness or accuracy.

The NBI is an aggregation of State, Federal agency and Tribal government bridge and associated highway data submitted to and maintained by the Federal Highway Administration (FHWA). It contains inspection and appraisal data of more than 600,000 of the Nation’s highway bridges located on public roads in accordance with the National Bridge Inspection Standards. The NBI data is used to determine the condition of the Nation’s bridges that is included in reports to Congress, as a data source for executing various sections of the Federal-aid program which involve highway bridges, for assessing the bridge penalty provisions of Title 23 United States Code (U.S.C.) section 119, as the data source for the evaluation of bridge performance measures established in Title 23 U.S.C. section 150, to assist in the oversight of the National Bridge Inspection Program, as a data source to assess and inform the condition and funding needs of highway bridges, and for strategic national defense needs.

This dataset provides geospatial locations and general bridge information for structures Owned By or Managed By WSDOT Bridge Preservation Office (BPO).The WSDOT Bridge Structures (Under) layer is a point dataset that represents a location at which a route crosses beneath a bridge/structure (a bridge/structure that is not represented in the (Bridge Structures (On) dataset) for example: pedestrian bridges, railroad bridges or tunnels. Vertical clearance minimum restrictions for a particular structure will be represented in the MinVertClrncUnderBridge or TunnelMinVertClrncOverRdBy10 fields. For more specific and detailed vertical clearance information please use the WSDOT Bridge Vertical Clearance Trip Planner: https://www.wsdot.wa.gov/Bridge/Structures/BVCTP.htm (Chrome Browser works best)

This is a dataset of structural bridge bearings. The bearings have been annotated using the American Association of State Highway and Transportation Officials (AASHTO) bridge inspection condition state guidelines and Bridge Inspector's Reference Manual (BIRM). The authors have included annotation guidelines and provided examples and explanation for bearings and their respective condition state assessment. There are a total of 947 images of bearings included in the dataset. The image size is 300x300. The bearing images were obtained from the COCO-Bridge-2021+ (Bianchi) dataset for structural detail detection. The data was split 10% testing, 90% training. After training with the EfficientNet B3 model (DOI: 10.7294/16628698), we were able to obtain an F1 score of 86.4%. More details of the training, the results, the dataset, and the code may be referenced in the journal article. The GitHub repository information may be found in the journal article. If you are using the dataset in your work, please include both the journal article and the dataset citation.

The Bureau of Local Projects (BLP) administers bridge length structures (greater than 20 foot in length) that are owned and maintained by a Local Public Authority (LPA). The NBI bridge inspection data is required by the FHWA to be submitted annually by KDOT for all LPA owned bridge length structures.More information about the Kansas Department of Transportation (KDOT) can be found at the following URL: ksdot.org.