Functional classification
Please review the USA Functional Classification page for details on this topic. In rare cases, a particular road may require a different type than prescribed in the national guidance. Before changing the type of any road past the bounds of the rules, please post the situation to the Maryland Forum to recieve feedback. Maryland resources can be found in the following links:
- State-wide
- SHA Highway Location Reference
- nzahn1's Mapping Resources (2012, Google Earth)
- Baltimore City
- MDOT Baltimore City Federal Aid Eligible Roads (2009)
- Carroll County
- Carroll County Function Classfication Webpage (2007)
Road names
Use these state-wide maps for the names and numbers of Interstate, US, and State highways. They also include the names of many local roads.
Use this tool to identify street addresses. MD Dept of Planning recommends Firefox for this mapping application, however Chrome works well too). Under the Contents tab, check Parcel Boundaries and uncheck all other options. Navigate to a property and click it, then click SDAT URL in the popup for the Real Property page. Note that the base map is copyrighted, but an alternate version is available with a base map that is not copyrighted.
Counties and cities
Use these maps for the names of local roads and smaller streets not identified on the state maps. Some also provide house numbers.
- Alternate version that links to SDAT.
- Choose City Map from the Base Map drop-down menu (all other options are copyrighted).
- Baltimore County GIS
- Calvert County GIS
- Carroll County GIS
- Cecil County GIS
- Frederick County GIS
- Garrett County PDF
- Howard County GIS
- Choose Development Plans from the Map & Data Tools tab for laying out new neighborhoods.