The North American Roads dataset was compiled on October 27, 2020 from the Bureau of Transportation Statistics (BTS) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset contains geospatial information regarding major roadways in North America. On March 31, 2025, the errant records with a value of 2 in the "NHS" field were corrected to have a value of 7 (Other NHS). The data set covers the 48 contiguous United States plus the District of Columbia, Alaska, Hawaii, Canada and Mexico. The nominal scale of the data set is 1:100,000. The data within the North American Roads layer is a compilation of data from Natural Resources Canada, USDOT’s Federal Highway Administration, and the Mexican Transportation Institute. North American Roads is a digital single-line representation of major roads and highways for Canada, the United States, and Mexico with consistent definitions by road class, jurisdiction, lane counts, speed limits and surface type.

This worldwide street map presents highway-level data for the world. Street-level data includes the United States; much of Canada; Mexico; Europe; Japan; Australia and New Zealand; India; South America and Central America; Africa; and most of the Middle East. This comprehensive street map includes highways, major roads, minor roads, one-way arrow indicators, railways, water features, administrative boundaries, cities, parks, and landmarks, overlaid on shaded relief imagery for added context. The map also includes building footprints for selected areas. Coverage is provided down to ~1:4k with ~1:1k and ~1:2k data available in select urban areas. The street map was developed by Esri using Esri basemap data, DeLorme basemap layers, U.S. Geological Survey (USGS) elevation data, Intact Forest Landscape (IFL) data for the world; HERE data for Europe, Australia and New Zealand, North America, South America and Central America, Africa, and most of the Middle East; OpenStreetMap contributors for select countries in Africa; MapmyIndia data in India; and select data from the GIS user community. For more information on this map, including the terms of use, visit us online at http://goto.arcgisonline.com/maps/World_Street_Map

Secondary roads are main arteries, usually in the U.S. Highway, State Highway, or County Highway system. These roads have one or more lanes of traffic in each direction, may or may not be divided, and usually have at-grade intersections with many other roads and driveways. They often have both a local name and a route number.Download: https://www2.census.gov/geo/tiger/TGRGDB24/tlgdb_2024_a_us_roads.gdb.zipMetadata: https://meta.geo.census.gov/data/existing/decennial/GEO/GPMB/TIGERline/Current_19115/series_tl_2023_roads.shp.iso.xml

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.

This web map created by the Colorado Governor's Office of Information Technology GIS team, serves as a basemap specific to the state of Colorado. The basemap includes general layers such as counties, municipalities, roads, waterbodies, state parks, national forests, national wilderness areas, and trails.Layers:Layer descriptions and sources can be found below. Layers have been modified to only represent features within Colorado and are not up to date. Layers last updated February 23, 2023. Colorado State Extent: Description: “This layer provides generalized boundaries for the 50 States and the District of Columbia.” Notes: This layer was filtered to only include the State of ColoradoSource: Esri Living Atlas USA States Generalized Boundaries Feature LayerState Wildlife Areas:Description: “This data was created by the CPW GIS Unit. Property boundaries are created by dissolving CDOWParcels by the property name, and property type and appending State Park boundaries designated as having public access. All parcel data correspond to legal transactions made by the CPW Real Estate Unit. The boundaries of the CDOW Parcels were digitized using metes and bounds, BLM's GCDB dataset, the PLSS dataset (where the GCDB dataset was unavailable) and using existing digital data on the boundaries.” Notes: The state wildlife areas layer in this basemap is filtered from the CPW Managed Properties (public access only) layer from this feature layer hosted in ArcGIS Online Source: Colorado Parks and Wildlife CPW Admin Data Feature LayerMunicipal Boundaries:Description: "Boundaries data from the State Demography Office of Colorado Municipalities provided by the Department of Local Affairs (DOLA)"Source: Colorado Information Marketplace Municipal Boundaries in ColoradoCounties:Description: “This layer presents the USA 2020 Census County (or County Equivalent) boundaries of the United States in the 50 states and the District of Columbia. It is updated annually as County (or County Equivalent) boundaries change. The geography is sources from US Census Bureau 2020 TIGER FGDB (National Sub-State) and edited using TIGER Hydrology to add a detailed coastline for cartographic purposes. Geography last updated May 2022.” Notes: This layer was filtered to only include counties in the State of ColoradoSource: Esri USA Census Counties Feature LayerInterstates:Description: Authoritative data from the Colorado Department of Transportation representing Highways Notes: Interstates are filtered by route sign from this CDOT Highways layer Source: Colorado Department of Transportation Highways REST EndpointU.S. Highways:Description: Authoritative data from the Colorado Department of Transportation representing Highways Notes: U.S. Highways are filtered by route sign from this CDOT Highways layer Source: Colorado Department of Transportation Highways REST EndpointState Highways:Description: Authoritative data from the Colorado Department of Transportation representing Highways Notes: State Highways are filtered by route sign from this CDOT Highways layer Source: Colorado Department of Transportation Highways REST EndpointMajor Roads:Description: Authoritative data from the Colorado Department of Transportation representing major roads Source: Colorado Department of Transportation Major Roads REST EndpointLocal Roads:Description: Authoritative data from the Colorado Department of Transportation representing local roads Source: Colorado Department of Transportation Local Roads REST EndpointRail Lines:Description: Authoritative data from the Colorado Department of Transportation representing rail lines Source: Colorado Department of Transportation Rail Lines REST EndpointCOTREX Trails:Description: “The Colorado Trail System, now titled the Colorado Trail Explorer (COTREX), endeavors to map every trail in the state of Colorado. Currently their are nearly 40,000 miles of trails mapped. Trails come from a variety of sources (USFS, BLM, local parks & recreation departments, local governments). Responsibility for accuracy of the data rests with the source.These data were last updated on 2/5/2019” Source: Colorado Parks and Wildlife CPW Admin Data Feature LayerNHD Waterbodies:Description: “The National Hydrography Dataset Plus (NHDplus) maps the lakes, ponds, streams, rivers and other surface waters of the United States. Created by the US EPA Office of Water and the US Geological Survey, the NHDPlus provides mean annual and monthly flow estimates for rivers and streams. Additional attributes provide connections between features facilitating complicated analyses.”Notes: This layer was filtered to only include waterbodies in the State of ColoradoSource: National Hydrography Dataset Plus Version 2.1 Feature LayerNHD Flowlines:Description: “The National Hydrography Dataset Plus (NHDplus) maps the lakes, ponds, streams, rivers and other surface waters of the United States. Created by the US EPA Office of Water and the US Geological Survey, the NHDPlus provides mean annual and monthly flow estimates for rivers and streams. Additional attributes provide connections between features facilitating complicated analyses.”Notes: This layer was filtered to only include flowline features in the State of ColoradoSource: National Hydrography Dataset Plus Version 2.1 Feature LayerState Parks:Description: “This data was created by the CPW GIS Unit. Property boundaries are created by dissolving CDOWParcels by the property name, and property type and appending State Park boundaries designated as having public access. All parcel data correspond to legal transactions made by the CPW Real Estate Unit. The boundaries of the CDOW Parcels were digitized using metes and bounds, BLM's GCDB dataset, the PLSS dataset (where the GCDB dataset was unavailable) and using existing digital data on the boundaries.” Notes: The state parks layer in this basemap is filtered from the CPW Managed Properties (public access only) layer from this feature layer Source: Colorado Parks and Wildlife CPW Admin Data Feature LayerDenver Parks:Description: "This dataset should be used as a reference to locate parks, golf courses, and recreation centers managed by the Department of Parks and Recreation in the City and County of Denver. Data is based on parcel ownership and does not include other areas maintained by the department such as medians and parkways. The data should be used for planning and design purposes and cartographic purposes only."Source: City and County of Denver Parks REST EndpointNational Wilderness Areas:Description: “A parcel of Forest Service land congressionally designated as wilderness such as National Wilderness Area.”Notes: This layer was filtered to only include National Wilderness Areas in the State of ColoradoSource: United States Department of Agriculture National Wilderness Areas REST EndpointNational Forests: Description: “A depiction of the boundaries encompassing the National Forest System (NFS) lands within the original proclaimed National Forests, along with subsequent Executive Orders, Proclamations, Public Laws, Public Land Orders, Secretary of Agriculture Orders, and Secretary of Interior Orders creating modifications thereto, along with lands added to the NFS which have taken on the status of 'reserved from the public domain' under the General Exchange Act. The following area types are included: National Forest, Experimental Area, Experimental Forest, Experimental Range, Land Utilization Project, National Grassland, Purchase Unit, and Special Management Area.”Notes: This layer was filtered to only include National Forests in the State of ColoradoSource: United States Department of Agriculture Original Proclaimed National Forests REST Endpoint

Link to landing page referenced by identifier. Service Protocol: Link to landing page referenced by identifier. Link Function: information-- dc:identifier.

This EnviroAtlas dataset describes several metrics related to road-stream crossings and roads near streams at the watershed scale. According to EPA report 600/R-97/130, roads can affect stream water in many ways and roads in close proximity to streams have the most potential for adverse effects on stream water quality. Since roads have an impervious surface, and ditches are built to channel water from roads into streams, the rate of water runoff is higher where there are more roads. Not only does this lead to increased scour of the river channel and stream banks, but it can also be a preferential pathway for runoff associated with road salting or routine maintenance which, along with other spills on the roadway, can lead to overall reductions in water quality. This dataset was produced the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

This service provides a quarterly snapshot of the North Carolina state-maintained road network centerlines. Here, the route network is divided into three layers with symbolized Route Classifications listed below.State Maintained RoadsInterstateUS RouteNC RouteSecondary RouteRampsRest AreasOther State Agency RouteState Maintained Roads - Primary RoadsInterstateUS RouteNC RouteState Maintained Roads - InterstatesInterstateNorth Carolina’s route network is comprised of Interstate, US, NC, Secondary Roads, Ramps, and non-state maintained and projected roads required for federal reporting purposes. Route attributes include Route Class, Route Qualifier, Route Inventory, Route Number, Route Name, and County name. The Route ID attribute is an 11-digit composite route number, the identifier for the Dominant Route. It uniquely identifies routes statewide and should be used as the route identifier when performing LRS analysis using route/milepost referencing.NCDOT adopted the road centerline based Linear Reference System (LRS) Network as it’s official Enterprise LRS, to which multiple road inventory attributes are referenced along measured routes throughout North Carolina. These routes are classified as either System or Non-System routes. System routes are routes within the state-maintained road network, and are comprised of Interstates, US Routes, NC Routes, Secondary Routes, Ramps, and Non-System Routes. Non-System routes are routes that are typically not maintained by NCDOT, but instead by a local agency (county, city or MPO/RPO). The local agency is the source for updating these Non-System routes in NCDOT’s LRS. The collection of routes, System and Non-System, is the NCDOT LRS Network referred to as MilePoint.MetadataThe metadata for the contained layers of the NCDOT State Maintained Roads service is available through the following links:NCDOT Route ArcsPoint of Contact North Carolina Department of Information Technology -Transportation, GIS UnitGIS Data and Services ConsultantContact information:gishelp@ncdot.govCentury Center – Building B1020 Birch Ridge DriveRaleigh, NC 27610Hours of service: 9:00am - 5:00pm Monday – FridayContact instructions: Please send an email with any issues, questions, or comments regarding the State Maintained Roads data. If it is an immediate need, please indicate as such in the subject line in an email.NCDOT GIS Unit GO! NC Product TeamLastUpdated: 2024-01-01 00:00:00

The cloud-based mapping service market is experiencing robust growth, driven by the increasing adoption of location-based services across various sectors. The convergence of advanced technologies like AI, IoT, and big data analytics is fueling demand for sophisticated mapping solutions capable of handling vast datasets and delivering real-time insights. Key application areas, such as connected ADAS (Advanced Driver-Assistance Systems) and highly automated driving, are significant contributors to market expansion, demanding high-precision, dynamic mapping capabilities. The shift towards cloud-based infrastructure offers scalability, cost-effectiveness, and accessibility advantages over traditional on-premise solutions, further accelerating market penetration. Different map types, including analytical, animated, collaborative, and online atlases, cater to diverse needs, creating a multifaceted market landscape. While data security and privacy concerns represent potential restraints, the market is poised for sustained growth due to continuous technological advancements and expanding application domains. We estimate the 2025 market size to be approximately $15 billion, projecting a Compound Annual Growth Rate (CAGR) of 15% from 2025 to 2033. This growth is underpinned by continuous innovation in mapping technologies and the expanding adoption of location intelligence across various industries. The major players in this market, including ESRI, Pitney Bowes, and CARTO, are investing heavily in R&D to enhance their offerings and gain a competitive edge. Regional variations exist, with North America and Europe currently holding significant market share, primarily due to higher technological adoption rates and established infrastructure. However, Asia Pacific is anticipated to witness rapid growth in the coming years, driven by increasing urbanization and expanding digital economies. The competitive landscape is characterized by both established players and emerging innovative companies striving for market dominance. This competitive dynamic is driving innovation and pushing the boundaries of what's possible with cloud-based mapping services, further contributing to the market's overall growth trajectory.

Maryland Roadway Centerline data consists of linear geometric features which represent the street centerline for all public roadways in the State of Maryland. The centerline represents the geographic location on the roadway between both shoulders (physical center), which often but not always coincides with the center painted line dividing bi-directional travel lanes. Roadway Centerlines data plays an important role in transportation management and planning, while also being the basis for all other roadway related data products.Maryland Roadway Centerline data is the end product of a statewide data sharing process between the Federal Highway Administration (FHWA), Maryland Department of Transportation (MDOT), Maryland Department of Transportation State Highway Administration (MDOT SHA), county governments and local municipal governments. Using a common centerline allows for better exchange of information related to the roadway system and provides opportunities for more efficient collection of information about roadway assets. Some centerlines were created in-house using imagery, GPS data, and MDOT SHA's Highway Performance Monitoring System (HPMS) database and others were received from county governments and updated in house using imagery, GPS data and MDOT SHA's HPMS database. The Centerline data includes annual HPMS updates / improvements submitted to the Federal Highway Administration (FHWA). Maryland Roadway Centerline data is needed for emergency response and management, routing buses and other vehicles, planning for land use and transportation needs, continuity of roadway data and display at county boundaries leading to the same "look and feel" across jurisdictions, tracking assets on and along the roadway network, producing maps at various scales, and numerous other applications. There are opportunities to make these processes more efficient, and this program addresses a shared foundation to solve some of these issues. This data is also used by various business units throughout MDOT, as well as many other Federal, State and local government agencies. Maryland Roadway Centerline data is updated and published on an annual basis for the prior year. This data is for the year 2017. Last Updated: November 2018 (11/28/2018) For questions, contact the MDOT SHA Geospatial Technologies Team:Email: (GIS@mdot.state.md.us)For additional information related to the Maryland Department of Transportation (MDOT):Website: (https://www.mdot.maryland.gov/)For additional information related to the Maryland Department of Transportation State Highway Administration (MDOT SHA):Website: (https://www.roads.maryland.gov/Home.aspx)MDOT SHA Geospatial Data Legal Disclaimer:The Maryland Department of Transportation State Highway Administration (MDOT SHA) makes no warranty, expressed or implied, as to the use or appropriateness of geospatial data, and there are no warranties of merchantability or fitness for a particular purpose or use. The information contained in geospatial data is from publicly available sources, but no representation is made as to the accuracy or completeness of geospatial data. MDOT SHA shall not be subject to liability for human error, error due to software conversion, defect, or failure of machines, or any material used in the connection with the machines, including tapes, disks, CD-ROMs or DVD-ROMs and energy. MDOT SHA shall not be liable for any lost profits, consequential damages, or claims against MDOT SHA by third parties.This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov.Feature Service Layer Link:https://mdgeodata.md.gov/imap/rest/services/Transportation/MD_RoadCenterlines/MapServer/3

The National Tunnel Inventory dataset was compiled on July 22, 2024 and published on July 24, 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 National Tunnel Inventory (NTI) is a collection of information (database) describing the more than 500 of the Nation's tunnels located on public roads, including Interstate Highways, U.S. highways, State and county roads, as well as publicly-accessible tunnels on Federal lands. The inventory data present a complete picture of the location, description, and classification data for each tunnel, as well as any load rating and inspection information. The element data present a breakdown of the condition of each structural and civil element for each tunnel on the National Highway System (NHS). The Specifications for the National Tunnel Inventory (SNTI) contains a detailed description of each data element including coding instructions and attribute definitions. The Coding Manual is published for each year of data collection; the manual is available at: https://doi.org/10.21949/1519104.

This EnviroAtlas dataset estimates green space along walkable roads. Green space within 25 meters of the road centerline is included and the percentage is based on the total area between street intersections. Green space provides valuable benefits to neighborhood residents and walkers by providing shade, improved aesthetics, and outdoor gathering spaces. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

DescriptionFeatures in this dataset represent segments of public highways that are maintained by and under the jurisdiction of the Colorado Department of Transportation. These highways consist of Interstates, US Highways, and State Highways. Features are represented by polyline (linear) geographic shapes. These highway segments are classified by Functional Class.Last Update2023 (Except for an update to US 550A mile 15-16.8 and connectors which are effective as of December 31, 2024)Update FrequencyAs neededData OwnerDivision of Transportation DevelopmentData ContactGIS Support UnitCollection MethodProjectionNAD83 / UTM zone 13NCoverage AreaStatewideTemporalDisclaimer/LimitationsThere are no restrictions and legal prerequisites for using the data set. The State of Colorado assumes no liability relating to the completeness, correctness, or fitness for use of this data.

THIS MAP SHOWS THE FOLLOWING:Designated Highways on the state-maintained system. The National Network and Virginia Qualifying Highways include all interstates and certain other highways respectively, with one road-mile of access permissible off these routes to access terminals, fuel, food, rest, and repairs (except in cities and towns, or in Henrico and Arlington Counties where permission is required from those localities). The Virginia Access portion includes certain other primary and secondary routes where no access is allowed off the system. LIMITATIONS & EXCLUSIONS REGARDING TRUCK ROUTES & RESTRICTIONS PROVIDED ON THIS MAP1. The information presented applies only to the highway systems maintained by the Virginia Department of Transportation (VDOT). Additional STAA access or restrictions may apply in incorporated cities and towns, and on secondary roads (numbered 600 or higher) in Henrico and Arlington Counties.2. Access to, or restrictions on, the indicated routes for the specified vehicles is applicable unless other restrictions or limitations apply due to weight, height, or width; incidents or construction; or as otherwise indicated by signs on the highway.3. To the best of our knowledge the information provided is updated on a weekly basis or as received from Districts. It is the responsibility of the highway user to ensure their information is current and correct.A permit for additional access off the state maintained system may be requested by contacting the Department of Motor Vehicles at (804) 497-7135. For additional access in cities and towns and in Henrico and Arlington Counties contact officials in those localities.

United States Bicycle Routes (USBR) are numbered routes for bicyclists that exist as a subset of the U.S. Numbered and Interstate Systems managed by the American Association of State Highway and Transportation Officials (AASHTO) Council on Highways and Streets. AASHTO indicates: “The purpose of the U.S. Bicycle Route System (USBRS) is to facilitate bicycle travel on appropriate roads, paths and highways over routes that are desirable for interstate bicyclists. A route should form continuity of available roads through two or more states connecting and traversing areas of scenic, cultural, and recreational interest.” https://transportation.org/route/about-us/ The American Association of State Highway and Transportation Officials (AASHTO) does not define “appropriate” in the statement above. Designation of a US Bike Route signifies that a route is legally usable by bicyclists and officially recognized and approved with a route number but does not certify that such routes provide facilities specifically designed for bicyclists or even designed to accommodate bicyclists. US Bicycle Routes may or may not include bicycle facilities, bicycle lanes, or bikeways as defined in the Manual on Uniform Traffic Control Devices (MUTCD). Neither the MUTCD, nor the Washington State Department of Transportation (WSDOT) define bicycle route. “Route” is a generic term referring to an established or selected course of travel. US Bicycle Routes in Washington State should be regarded as navigation aids only, similar to other named routes such as scenic byways. WSDOT does not have policy that requires bicycle facilities to be present in order for a US Bike Route to be designated. US Bicycle Routes in Washington State may, or may not include signage to aid bicycle navigation. Please direct questions about this dataset to: grace.young@wsdot.wa.gov.

The National Highway Freight Network (NHFN) consists of four components: 1) Primary Highway Freight System (PHFS): this is a network of highways identified as the most critical highway portions of the U.S. freight transportation system determined by measurable and objective national data; 2) Other Interstate portions not on the PHFS: these highways consistof the remaining portion of Interstate roads not included in the PHFS; 3)Critical Rural Freight Corridors (CRFCs): these are public roads not in an urbanized area which provide access and connection to the PHFS and the Interstate with other important ports, public transportation facilities, or other intermodal freight facilities; 4) Critical Urban Freight Corridors (CUFCs):these are public roads in urbanized areas which provide access and connection to the PHFSand the Interstate with other ports, public transportation facilities, or other intermodal transportation facilities. FHWA designates the PHFS, while states and in certain cases, Metropolitan Planning Organizations (MPOs), are responsible for designating public roads for the CRFCs and CUFCs in accordance with U.S.C Title 23, Section 167. This GIS dataset provides an inventory of the PHFS and Non-PHFS Interstates, reflecting the 2022 redesignation by the FHWA. The original GIS shapefiles were acquired through FHWA’s National Highway Freight Network Tool in 2023: https://usdot.maps.arcgis.com/apps/webappviewer/index.html?id=c4c0fdef029a4093b169e493e1883988

Web map depicting road-separated bicycle routes throughout the State of Maryland. In many instances these routes can be used by pedestrians, but not by any motorized vehicle. “Road Separated” indicates that these segments are physically separated from roads in which motorized vehicles travel. That is, these are not bike lanes, sharrows, or signed bike routes per se – these segments are separated from the main road by a physical barrier (E.g., grass, natural earth, trees, etc.) and in many instances do not follow a motorized vehicle route network at all (E.g., a wholly separated trail). This information in this web map will be used in conjunction with the One Maryland One Centerline (OMOC) initiative to provide a Level of Traffic Stress (LTS) map for the State of Maryland. The recommended LTS score for each road-separated bicycle route is listed in the pop-up menu.Bikeways included in the map are of varying surface material but are typically paved or hard-packed surface. Sidewalks, typically 6-feet-wide, hard surface pathways primarily for pedestrian use, are not included in this map. The preferred width of bikeways included is at least 10-feet wide, although bikeways may be narrower if anticipated traffic volumes are minimal. For instance, while most pathways within Columbia are 8 to 10 feet wide, some pathways are narrower when connecting to cul-du-sacs. These narrower pathways are included in the map as the anticipated traffic volume are low enough to minimize user conflict. The feature class used in the web map was compiled by the Maryland Department of Transportation (Secretary’s Office) using a variety of sources including (but not limited to) state data sources from various agencies including the Maryland Department of Transportation (MDOT), Maryland Department of Planning (MDP), and Maryland Department of Natural Resources (DNR). Data has also been augmented by counties and municipalities throughout the State of Maryland as well as several agencies, organizations, and conservancies. Certain named trails are included within this dataset and their sources have varied from state, local, and non-profits as well as through the digitizing of various aerial/satellite imagery, digital elevation models (DEM), right-of-ways, former railways, and corridors by MDOT staff. None of the alignments included in this dataset are restricted to private use.The searchable data includes attribute information containing the route’s name (if applicable), calculated segment length (using the Maryland State Plane 1983 Projection), and Level of Traffic Stress (LTS) score. The data mostly contains alignment segments with a LTS of 0, the lowest score. This score indicates that the bikeway can be comfortably used by cyclists of all levels and experience and has minimal automobile traffic interaction. There are several segments with LTS scores of 1 or 2 within this feature class as well, but these are mostly connector paths/trails between larger segments. LTS scores of 1 or 2 indicate very little automobile traffic and/or slower speeds required for the automobile traffic.This web map will be updated as needed but is scheduled to be comprehensively reviewed on an annual basis. ATTRIBUTES:Route Name (if Applicable): The name of the route is provided if the route is namedCounties within Route: The counties in Maryland through which the route passes are listedRoute's Length: The route distance is calculated and listed in miles. Note that this is the length of the entire named route - and not just the segment selected. Distance calculated using the NAD 1983 StatePlane Maryland FIPS 1900 (US Feet) Projection.LTS Score: Level of Traffic Stress. For this map (road-separated routes) the scores range from 0 (road-separated) to 2 (generally low traffic). The areas that are not 0 in this map/data represent portions of the road-separated routes that cross streets or have portions that are briefly on-road as connections.

This EnviroAtlas dataset addresses the tree buffer along heavily traveled roads. The roads are interstates, arterials, and collectors within the EnviroAtlas community boundary. In this community, forest is defined as Trees & Forest and Woody Wetlands. Sufficient tree bufferage is defined as 25% coverage within the circular moving window with a radius of 14.5m at any given point along the roadway. There are potential negative health effects for those living in a location without a sufficient tree buffer. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

The National Highway System consists of roadways important to the nation’s economy, defense, and mobility. The National Highway System (NHS) includes the following subsystems of roadways: Interstate - The Eisenhower Interstate System of highways, Other Principal Arterials - highways in rural and urban areas which provide access between an arterial and a major port, airport, public transportation facility, or other intermodal transportation facility, Strategic Highway Network (STRAHNET) - a network of highways which are important to the United States’ strategic defense policy and which provide defense access, continuity and emergency capabilities for defense purposes, Major Strategic Highway Network Connectors - highways which provide access between major military installations and highways which are part of the Strategic Highway Network, Intermodal Connectors - highways providing access between major intermodal facilities and the other four subsystems making up the National Highway System. A specific highway route may be on more than one subsystem.The primary purpose of this map is to serve the FHWA needs in highway planning, policy analysis, visualization of the NHS database and keep track the NHS approval as well as the technical corrections.