Baltimore Harbor Tunnel

US 522 in Maryland


US 522
Get started Myersdale
End Hancock
Length 2 mi
Length 3 km
West Virginia



According to transporthint, US 522 is a US Highway in the US state of Maryland. The road forms a north-south route through the narrowest part of Maryland and is largely double-numbered with Interstate 70. The route is only 2 miles long and leads from the West Virginia border through Hancock and then heads north on I-70, where it also intersects with Interstate 68. US 522 in Pennsylvania is also double-numbered with I-70.

Baltimore Harbor Tunnel

Baltimore Harbor Tunnel
crosses Patapsco River
Length 2,332 meters
Opening 29-11-1957
Intensity 70,500 mvt/day
Location Map

According to travelationary, the Baltimore Harbor Tunnel is an immersion tunnel in the United States, located in Baltimore, Maryland.


The Harbor Tunnel is located under the Patapsco River in the Baltimore Harbor area. It is a 2,332 meter long two – tube immersion tunnel. Interstate 895 in Maryland, a bypass of Baltimore, runs through the tunnel. The tunnel has 2×2 lanes. The tunnel has narrow lanes, the maximum speed is 80 km/h. The tunnel runs a maximum of 30.8 meters below sea level.


The Harbor Tunnel was the first river crossing to cross the Patapsco River near Baltimore. To do this, traffic had to pass through the city via the secondary road network. The tunnel was constructed between 1955 and 1957 and opened to traffic on November 29, 1957 as a toll road. The toll at the time was $0.40 per direction. The tunnel soon became congested as it was Baltimore’s only bypass. In 1977 the Francis Scott Key Bridge further south opened and in 1985 the Fort McHenry Tunnel on I-95, relieving the Harbor Tunnel.

Traffic intensities

In 2011, 70,500 vehicles drove through the Harbor Tunnel every day, which is therefore at its maximum capacity.


The tunnel is a toll road, the toll is $3 in both directions.

Capital Beltway

The Capital Beltway is the beltway of Washington, DC, numbered Interstate 495. The beltway passes through the states of Virginia and Maryland and a very small part through the District of Columbia.

Chesapeake Bay Bridge

Chesapeake Bay Bridge
Spans Chesapeake Bay
Lanes 2+3
Total length 6,946 meters
Main span 488 meters
Bridge deck height 57 meters
Opening 30-07-1952 / 28-06-1973
Traffic intensity 72,200 mvt/day
Location Map

The Chesapeake Bay Bridge is a suspension bridge in the United States, located in the state of Maryland.


The Chesapeake Bay Bridge is two 6,946-meter parallel spans spanning the Chesapeake Bay near the capital Annapolis. The spans consist of two suspension bridges with a main span of 488 meters and a free passage of 57 meters under the bridge deck. East of the suspension bridges are two more main spans, consisting of an arch bridge and a cantilever truss bridge. The spans are 125 meters apart. US 50 runs across the compound in Maryland, a 2-lane freeway east and 3-lane west. The connection will handle traffic from the capital Annapolis and the Washington regionto rural eastern Maryland and much of the state of Delaware. The bridge connection is a toll road.


Already at the beginning of the 20th century serious studies were carried out into a fixed connection across the Chesapeake Bay, the largest bay in the United States. At the time, the span was seen a little further north, east of Baltimore. The construction of this bridge was quite concrete, but the stock market crash of 1929 delayed the plans for final cancellation at that location.

In 1938, a bridge connection was proposed at its current location east of Annapolis. However, the second world war delayed the construction. The bridge was finally built with one span between 1949 and 1952 and opened to traffic on July 30, 1952. When it opened, it was the longest steel bridge over water and the third longest bridge in the world. This bridge has 2 lanes without emergency lanes.

After traffic increased significantly in the 1950s and 1960s, it was decided to build a second span north of the first bridge. The second span was constructed between 1969 and 1973 and opened to traffic on June 28, 1973. This bridge connection is visually identical, but has a wider bridge deck.


The Chesapeake Bay Bridge is at its maximum capacity. A study was carried out in 2004 which showed that an extra connection was the best solution. A location was not chosen and the plan has been postponed for the time being.

Traffic intensities

In 2011, 72,200 vehicles crossed the Chesapeake Bay Bridge every day. This is relatively high because there are no major cities east of the bridge. Virtually all of eastern Maryland and much of the Delmarva Peninsula is served by this bridge.


The bridge is a toll road, the toll is a relatively limited $4 and is charged eastward only.

Clara Barton Parkway

Clara Barton Pkwy
Get started Cabin John
End Washington
Length 8 km
Washington BeltwayCabin John

Cabin John Parkway

Glen Echoes

The Clara Barton Parkway is a parkway in the US state of Maryland. The road is named after Clara Barton, the founder of the American Red Cross. The road is a northwest exit route from Washington, and runs on the north bank of the Potomac River. The highway is 8 kilometers long.

Travel directions

The highway begins at Cabin John, at the interchange with Interstate 495. The highway is partly substandard because partly there are not two lanes available in each direction. In Washington the road ends after 8 kilometers.

Baltimore Harbor Tunnel