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Maryland Road Centerlines - Interstates [Maryland]

MDOT SHA · 2025 Full Details

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Title
Maryland Road Centerlines - Interstates [Maryland]
Description
Road Centerlines data consists of linear features which represent the street centerline for all public roadways in the State of Maryland. Road Centerlines data is segmented for each intersecting feature along a route, which means multiple linear features may represent a single route. This layer specifically shows the Interstate (IS) roadways and Interstate ramps (RP) throughout the State of Maryland. Road Centerlines 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). Road Centerlines 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 modules throughout MDOT, as well as many other State and local government agencies. Road Centerlines data is updated and published on an annual (yearly) 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: ( GIS@mdot.state.md.us ) For additional information related to the Maryland Department of Transportation (MDOT): ( https://www.mdot.maryland.gov/) For additional information related to the Maryland Department of Transportation State Highway Administration (MDOT SHA): (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/0
Creator
MDOT SHA
Temporal Coverage
Last Modified: 2025-05-12
Date Issued
2016-04-05
Rights
The Spatial Data, and the information therein, (collectively the "Data") is provided "as is" without warranty of any kind, either expressed, implied, or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct, indirect, incidental, consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data, nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.
Access Rights
Public
Format
ArcGIS DynamicMapLayer
Language
English
Date Added
August 10, 2025
Provenance Statement
The metadata for this resource was last retrieved from Maryland iMap on 2025-08-24.

Resource Class

Theme

Place

Local Collection

Links

Cite and Reference

  • Citation
    MDOT SHA (2016). Maryland Road Centerlines - Interstates [Maryland]. . https://data.imap.maryland.gov/datasets/maryland::maryland-road-centerlines-interstates (web service)
  • BTAA Geoportal Link

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