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Primary Interstate highways[edit]
| Route Number
|
Length
|
Western / Southern Terminus
|
Eastern / Northern Terminus
|
Counties
|
 I-68
|
81.09 miles (130.50 km)
|
I-68 at West Virginia state line
|
   I-70/US 40/US 522 in Hancock
|
Garrett, Allegany, Washington
|
| I-70
|
93.62 miles (150.67 km)
|
I-70/US 522 at Pennsylvania state line near Hancock
|
 MD 122 at Baltimore City line near Woodlawn
|
Washington, Frederick, Carroll, Howard, Baltimore
|
 I-81
|
12.08 miles (19.44 km)
|
I-81 at West Virginia state line in Williamsport
|
I-81 at Pennsylvania state line near Hagerstown
|
Washington
|
 I-83
|
34.5 miles (55.5 km)
|
East Fayette & North President Streets and Fallsway in Baltimore
|
I-83 at Pennsylvania state line
|
Baltimore City, Baltimore County
|
 I-95
|
110.01 miles (177.04 km)
|
 I-95/I-495 in Alexandria, VA
|
I-95 near Newark, DE
|
Prince George's , Howard, Baltimore County, Baltimore City, Harford, Cecil
|
 I-97
|
17.62 miles (28.36 km)
|
   I-595/US 50/US 301 near Annapolis
|
  I-695 / I-895 near Baltimore
|
Anne Arundel
|
Source: Maryland State Highway Administration, Highway Location Reference, 2005
Auxiliary Interstate highways[edit]
| Route Number
|
Length
|
Western / Southern Terminus
|
Eastern / Northern Terminus
|
Counties
|
 I-170
|
Former Route
|
I-70 at Gwynns Falls Park
|
US 40 at MLK Blvd.
|
Baltimore City
|
 I-270
|
34.40 miles (55.36 km)
|
I-70/US 40 near Frederick
|
 I-495/MD 355 north of Bethesda
|
Frederick, Montgomery
|
 I-370
|
3.13 miles (5.04 km)
|
Sam Eig Highway & Washingtonian Boulevard in Gaithersburg
|
Shady Grove Metro Station
|
Montgomery
|
 I-195
|
4.88 miles (7.85 km)
|
 I-95/MD 166 near Catonsville
|
 Baltimore-Washington International Thurgood Marshall Airport
|
Baltimore County, Anne Arundel
|
 I-295
|
0.80 miles (1.29 km)
|
I-95/I-495 near Forest Heights
|
I-295 at DC border
|
Prince George's
|
 I-395
|
1.33 miles (2.14 km)
|
South Howard Street & West Conway Street in Downtown Baltimore
|
I-95
|
Baltimore City
|
| I-495
|
41.09 miles (66.13 km)
|
I-95/I-495 at Virginia state line
|
I-495 at Virginia state line
|
Prince George's , Montgomery
|
| I-595
|
19.97 miles (32.14 km)
|
I-95/I-495/Capital Beltway/US 50 outside Washington, DC
|
 US 50/US 301/MD 70 in Annapolis, MD
|
Prince George's , Anne Arundel
|
 I-695
|
51.46 miles (82.82 km)
|
Beltway around Baltimore
|
Baltimore City, Anne Arundel, Baltimore County
|
 I-795
|
8.99 miles (14.47 km)
|
I-695 in Pikesville
|
  MD 140/MD 795 in Reisterstown
|
Baltimore County
|
 I-895
|
14.87 miles (23.93 km)
|
I-95 near Elkridge
|
I-95 in Baltimore
|
Howard, Baltimore County, Anne Arundel, Baltimore City
|
Source: Maryland State Highway Administration, Highway Location Reference, 2005
U.S. Highways[edit]
| Route Number
|
Length
|
Western / Southern Terminus
|
Eastern / Northern Terminus
|
Counties
|
 US 1
|
84 miles (135 km)
|
US 1 at DC border in Mount Rainier
|
US 1 at Pennsylvania border near Rising Sun
|
Prince George's , Howard, Baltimore County, Baltimore City, Harford, Cecil
|
 US 11
|
12.83 miles (20.65 km)
|
US 11 at West Virginia border near Williamsport
|
US 11 at Pennsylvania border near Maugansville
|
Washington
|
 US 13
|
42.48 miles (68.36 km)
|
US 13 at Virginia border near Pocomoke City
|
US 13 at Delaware border in Delmar
|
Worcester, Somerset, Wicomico
|
 US 15
|
37.85 miles (60.91 km)
|
US 15 at Virginia border near Point of Rocks
|
US 15 at Pennsylvania border near Emmitsburg
|
Frederick
|
 US 29
|
25.91 miles (41.70 km)
|
US 29 at DC border near Silver Spring
|
 MD 99 in Mount Hebron
|
Montgomery, Howard
|
| US 40
|
221.31 miles (356.16 km)
|
US 40 at Pennsylvania border near Addison, PA
|
US 40 at Delaware border near Glasgow, DE
|
Garrett, Allegany, Washington, Frederick, Carroll, Howard, Baltimore County, Baltimore City, Harford, Cecil
|
 US 48
|
Former Route
|
I-68 at West Virginia state line near Friendsville
|
I-70 near Hancock
|
Garrett, Allegany, Washington
|
| US 50
|
150.06 miles (241.50 km)
|
US 50 at DC border in Cheverly[1]
|
 MD 528 in Ocean City
|
Garrett, Prince George's, Anne Arundel, Queen Anne's, Talbot, Dorchester, Wicomico, Worcester
|
 US 111
|
Former Route
|
US 1 in Baltimore
|
U.S. Route 111 at Pennsylvania border
|
Baltimore City, Baltimore County
|
 US 113
|
37.84 miles (60.90 km)
|
US 13 in Pocomoke City
|
US 113 at Delaware state line
|
Worcester
|
 US 140
|
Former Route
|
US 140 at Pennsylvania state line
|
US 1 in Baltimore
|
Carroll, Baltimore County, Baltimore City
|
 US 213
|
Former Route
|
US 50 in Wye Mills
|
US 40 in Elkton
|
Queen Anne's, Kent, Cecil
|
 US 219
|
48.40 miles (77.89 km)
|
US 219 at West Virginia border near Redhouse
|
US 219 at Pennsylvania border near Grantsville
|
Garrett
|
 US 220
|
27.35 miles (44.02 km)
|
US 220 at West Virginia border near McCoole
|
US 220 at Pennsylvania border near Cumberland
|
Allegany
|
 US 222
|
3.60 miles (5.79 km)
|
   
 US 1/MD 222/MD 222 Truck in Conowingo, MD
|
US 222 at Pennsylvania border
|
Cecil
|
 US 240
|
Former Route
|
US 240 at DC border
|
US 40 in Frederick
|
Montgomery, Frederick
|
| US 301
|
123.30 miles (198.43 km)
|
US 301 at Virginia border at Governor Harry W. Nice Memorial Bridge
|
US 301 at Delaware border in Warwick
|
Charles, Prince George's, Anne Arundel, Queen Anne's, Kent, Cecil
|
 US 340
|
16.99 miles (27.34 km)
|
US 340 at Virginia border near Weverton
|
US 40 in Frederick
|
Washington, Frederick
|
| US 522
|
2.37 miles (3.81 km)
|
US 522 at West Virginia border near Hancock
|
I-70/US 522 at Pennsylvania border near Hancock
|
Washington
|
 US 622
|
Former Route
|
US 40 in Hancock
|
US 622 near Hancock
|
Washington
|
Source: Maryland State Highway Administration, Highway Location Reference, 2005
- ^ A short western segment of US 50 in Maryland runs through Garrett County, entering West Virginia at both ends
I-68
I-70/US 40/US 522 in Hancock
MD 122 at Baltimore City line near Woodlawn
I-81
I-83
I-95
I-95/I-495 in Alexandria, VA
I-97
I-595/US 50/US 301 near Annapolis
I-695 / I-895 near Baltimore
