MDOT GIS Open Data Portal

The Maryland Department of Transportation (MDOT) GIS Open Data Portal is a comprehensive resource for geospatial content from MDOT and the entire State of Maryland. Users can easily search for the latest data using keywords or geographic location, making it simple to discover and quickly display relevant content. This portal reflects MDOT's commitment to being open, transparent, and providing data that is openly accessible and usable by all.

The portal features several interactive mapping applications designed to provide focused access to information and tools. These applications allow citizens to visualize and analyze MDOT data, supporting engagement around specific goals and initiatives. Examples include the "Highways to Black History Tour," "Maryland's Traffic Control Device Inventory," and a map for "Roadway Maintenance" issues, along with the "MDOT's six-year capital investment program" (CTP).

In addition to interactive maps, the portal highlights featured open datasets, which are some of MDOT's most popular published datasets in Maryland's GIS Data Catalog. These include linear and point features showing annual average daily traffic (AADT), MDOT SHA's National Pollutant Discharge Elimination System (NPDES) data, and the Roadway Sign Inventory. More MDOT and State of Maryland data layers can be found through the general search functions available on the platform.