List of Interstate and U.S. highways in Maryland

Two nationwide systems of numbered highways are present in the U.S. state of Maryland: the Interstate Highway System, the U.S. Numbered Highways. These systems, along with the Maryland state highway system, are the primary roads connecting the various parts of Maryland. Most numbered highways in Maryland are maintained by the Maryland State Highway Administration. The exceptions are highways in Baltimore, which are maintained by the Baltimore Department of Transportation, and toll facilities in Maryland maintained by the Maryland Transportation Authority.

The Maryland State Highway Administration, established as the State Roads Commission in 1908,cite web|url=http://www.mdhighwaycentennial.com/history.html|author=Maryland State Highway Administration|title=Maryland Highway Centennial - History|year=2008|accessdate=2008-07-05] constructed portions of what would become the state highway system built by 1910.cite map|publisher=.

The Interstate highway with the longest segment in Maryland is I-95, at convert|110.01|mi|km, and the Interstate highway with the shortest segment in Maryland is I-295, at convert|0.80|mi|km. The U.S. highway with the longest segment in Maryland is U.S. Route 40, at convert|221.31|mi|km, and the U.S. highway with the shortest segment in Maryland is U.S. Route 522, at convert|2.37|mi|km. The longest Maryland state highway is Maryland Route 2, at convert|79.24|mi|km, and the shortest Maryland state highway is the unsigned Maryland Route 963 at convert|0.01|mi|km.

Several former U.S. highways previously existed in Maryland: U.S. Route 48cite web|author=|url=http://www.roadstothefuture.com/Balt_Int_Full_Map_XL.jpg|title=Interstate Division for Baltimore City, 3-A System Current Status Map|year=1981|accessdate=2008-07-12]

Primary Interstate highways

U.S. highways

Notes

References

External links

* [http://www.mdroads.com mdroads.com] Gives a complete listing of both current and past Maryland state highways.
* [http://www.sha.state.md.us/keepingcurrent/performTrafficStudies/dataAndStats/hwyLocationRef/oppe/hlr.asp Highway Location Reference, from Maryland State Highway Administration]
* [http://mdo20.0catch.com/route/md/mdsign.html Road Signs of Maryland]
* [http://www.aaroadtrips.com/maryland.html AARoads Maryland Highways Page]