List of Interstate Highways in Maryland

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Interstate Highways of the Maryland highway system
I-95.svg I-695.svg
Standard route signs in Maryland
Highway names
Interstates: Interstate X (I-X)
System links

The following is a list of Interstate Highways in Maryland. There are currently 16 Interstate Highways that exist entirely or partially in the U.S. state of Maryland. Six of these are primary Interstates while ten are auxiliary Interstates related to one of the primary Interstates. The longest primary Interstate in Maryland is Interstate 95 (commonly abbreviated I-95) at 110.01 mi (177.04 km). The shortest primary Interstate in Maryland is I-81 at 12.08 mi (19.44 km). I-97 is the shortest primary Interstate at 17.62 mi (28.36 km) and the shortest intrastate Interstate. I-97 is also the only primary Interstate to be located entirely within one county and to not connect with any other primary Interstate. The longest auxiliary Interstate in Maryland is I-695 at 51.48 mi (82.85 km). The shortest auxiliary Interstate in Maryland is I-295 at 0.80 mi (1.29 km). All Interstates are maintained by the Maryland State Highway Administration except for all of I-395, all of I-895, a small part of I-695, I-95 within and north of Baltimore, and I-83 within Baltimore. Maryland has one unsigned Interstate, I-595; that highway is marked as U.S. Route 50 and US 301, which are concurrent with I-595 for its entire length. Maryland has one former Interstate, I-170, which is shaded in dark gray in the list.

Number Length (mi)[1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-68 81.09 130.50 I-68 at the West Virginia state line near Friendsville I-70 / US 40 / US 522 in Hancock 1991[2] current
I-70 93.62 150.67 I-70 / US 522 at the Pennsylvania state line in Hancock MD 122 / Park and ride in Baltimore 1962[3] current FrederickBaltimore section was designated I-70N in 1965;[4] that section became part of I-70 in 1974[5]
I-81 12.08 19.44 I-81 at the West Virginia state line in Williamsport I-81 at the Pennsylvania state line near Hagerstown 1959[6] current
I-83 34.50 55.52 Fayette Street and President Street in Baltimore I-83 at the Pennsylvania state line at Maryland Line 1959[6] current
I-95 110.01 177.04 I-95 / I-495 at the Virginia state line near Oxon Hill I-95 at the Delaware state line near Elkton 1963[7] current
I-97 17.62 28.36 US 50 / US 301 in Parole I-695 / I-895 in Ferndale 1987[8] current
I-170 1.40 2.25 US 1 / US 40 in Baltimore US 40 in Baltimore 1981[9] 1985[10] Replaced by US 40
I-195 4.35 7.00 I-95 / MD 166 in Arbutus MD 170 near BWI Airport 1989[11] current
I-270 32.60 52.46 I-495 / MD 355 in Bethesda I-70 / US 40 in Frederick 1959[6] current Designated I-70S in 1959; became I-270 in 1974[5]
I-295 0.80 1.29 I-95 / I-495 / MD 210 in Oxon Hill I-295 in Washington, D.C. 1965[4] current
I-370 2.54 4.09 Sam Eig Highway in Gaithersburg MD 200 in Redland 1989[11] current
I-395 1.33 2.14 I-95 in Baltimore Howard Street and Camden Street in Baltimore 1981[9] current
I-495 41.09 66.13 I-95 / I-495 at the Virginia state line near Oxon Hill I-495 at the Virginia state line near Cabin John 1963[7] current Beltway around Washington, D.C.
I-595 19.97 32.14 I-95 / I-495 / US 50 near Glenarden US 50 / US 301 / MD 70 in Parole 1991 current Unsigned highway; signed as US 50 and US 301
I-695 51.46 82.82 Beltway around Baltimore 1959[6] current
I-795 8.99 14.47 I-695 in Pikesville MD 140 / MD 795 in Reisterstown 1985[10] current
I-895 14.87 23.93 I-95 in Elkridge I-95 in Baltimore 1979[12] current

See also[edit]

References[edit]

  1. ^ Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved 2012-10-06. 
  2. ^ Maryland State Highway Administration (1991). Maryland: Official Highway Map (Map). Baltimore: Maryland State Highway Administration. 
  3. ^ Maryland State Roads Commission (1962). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission. 
  4. ^ a b Maryland State Roads Commission (1965). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission. 
  5. ^ a b Maryland State Highway Administration (1974). Maryland: Official Highway Map (Map). Baltimore: Maryland State Highway Administration. 
  6. ^ a b c d Maryland State Roads Commission (1959). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission. 
  7. ^ a b Maryland State Roads Commission (1963). Maryland: Official Highway Map (Map). Baltimore: Maryland State Roads Commission. 
  8. ^ Maryland State Highway Administration (1987). Maryland: Official Highway Map (Map). Baltimore: Maryland State Highway Administration. 
  9. ^ a b Maryland State Highway Administration (1981). Maryland: Official Highway Map (Map) (1981–82 ed.). Baltimore: Maryland State Highway Administration. 
  10. ^ a b Maryland State Highway Administration (1985). Maryland: Official Highway Map (Map) (1985–86 ed.). Baltimore: Maryland State Highway Administration. 
  11. ^ a b Maryland State Highway Administration (1989). Maryland: Official Highway Map (Map). Baltimore: Maryland State Highway Administration. 
  12. ^ Maryland State Highway Administration (1979). Maryland: Official Highway Map (Map) (1979–80 ed.). Baltimore: Maryland State Highway Administration.