Overview | |
---|---|
Location | Patapsco River, Baltimore, Maryland, U.S. |
Coordinates | 39°15′15″N76°34′16″W / 39.25417°N 76.57111°W |
Route | I-895 |
Operation | |
Opened | November 29, 1957 [1] [2] |
Operator | Maryland Transportation Authority |
Toll | Passenger cars: $3 Maryland E-ZPass $4 non-Maryland E-ZPass $6 Video toll |
Technical | |
Length | 7,650 ft (1.45 mi; 2.33 km)[ citation needed ] |
No. of lanes | 4 |
Tunnel clearance | 14 ft (4.3 m) |
Route map | |
The Baltimore Harbor Tunnel is a pair of two-lane road tunnels carrying I-895 under the Patapsco River southeast of downtown Baltimore, Maryland.
The pair of tunnels is 7,650 feet (1.45 mi; 2.33 km) long, stretching from the south shore of the Patapsco River to the north shore near Dundalk. Each tunnel is 22 feet (6.7 m) wide and 14 feet (4.3 m) high, and accommodates two lanes of traffic. The maximum speed within the tunnel is 50 miles per hour (80 km/h). Two-way traffic may occur in either tunnel for overnight roadwork or during emergencies that close down one of the tunnels. The Tunnel has lane control signals to control which lanes are open, closed or as contra-flow traffic. [3]
Both portals have ventilation buildings, with a total of 32 fans in place to replace the air within the tunnels, which is drawn in through the tunnel floors and exhausted through the tunnel ceilings. The tubes themselves range from a depth of 50 feet (15.2 m) below ground to 101 feet (30.8 m) below ground.
As of July 1, 2015, the toll rate for cars is $4.00 cash or $3.00 E-ZPass, paid in both directions. Vehicles with more than two axles pay additional amounts, up to $30.00 for six axles. [4] In March 2020, all-electronic tolling was implemented as a result of the COVID-19 pandemic, with tolls payable through E-ZPass or Video Tolling, which uses automatic license plate recognition. All-electronic tolling was made permanent in August 2020. [5]
The tunnel and approaches were designed by Singstad and Baillie, a New York-based engineering firm specializing in tunnel design, in association with the J. E. Greiner Company, a local Baltimore-based firm. The tunnel was formed out of twenty-one 310-foot-long (94 m) sections individually submerged into a pre-dredged trench in the harbor and secured with rocks and backfill; the first of these tunnel segments was sunk on April 11, 1956. [6] The remainder of the tunnel was constructed using the cut-and-cover method, extending from the submerged tubes to the north and south portals. The project's costs ultimately reached $150 million ($1,627 million in 2023). [7]
The tunnel opened on November 29, 1957, with a dedication by Maryland Governor Theodore McKeldin and a crowd of 4,000 spectators. [8] The initial toll for standard cars was 40¢. [2] In the first 12 hours of operation, the tunnel handled an estimated 10,000 vehicles, mostly drivers from Maryland. [9] In the same period, the tunnel also experienced its first collision (15 minutes after opening), first flat tire and first stalled vehicle. [10]
The tunnel was considered a success by the Maryland Transportation Authority (MDTA), as it eliminated 51 traffic signals for through-traffic in Baltimore, and reduced neighborhood street commercial traffic by up to 40%. [11] However, increased tunnel usage and high traffic volume led to the planning, construction, and opening of the nearby Fort McHenry Tunnel in 1985, creating the final link of Interstate 95 in Maryland. The Harbor Tunnel was then closed in phases for extensive rehabilitation, beginning in March 1987. [12] It was fully reopened by 1990.
In November 2007, the 50th anniversary of the tunnel serving travelers was observed. [13] [14] In November 2018, the MDTA started a multi-year project to replace the I-895 bridge spans north of the tunnel. The $189 million project also includes $28 million to repair and upgrade the tunnel itself. Originally planned to be complete by summer 2021, work was largely finished ahead of schedule in December 2020. [15] [16]
After the Francis Scott Key Bridge collapse on March 26, 2024, the Harbor Tunnel became one of the primary alternate routes for drivers and trucks containing non-hazardous loads. [17]
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E-ZPass is an electronic toll collection system used on toll roads, toll bridges, and toll tunnels in the Eastern United States, Midwestern United States, and Southern United States. The E-ZPass Interagency Group (IAG) consists of member agencies in several states, which use the same technology and allow travelers to use the same transponder on toll roads throughout the network.
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The Governor Harry W. Nice Memorial/Senator Thomas "Mac" Middleton Bridge, also known as the Potomac River Bridge, is a 1.7-mile (2.7 km), four-lane continuous truss bridge that spans the Potomac River between Newburg in Charles County, Maryland and Dahlgren in King George County, Virginia, United States. It is one of eight toll facilities operated by the Maryland Transportation Authority, and is one of two toll bridges over the Potomac River. The other, the privately owned Oldtown Low Water Toll Bridge, connects Maryland and West Virginia, far upstream. The new Nice Bridge opened to traffic in October 2022. Demolition of the original bridge began on March 21, 2023.
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The Maryland Transportation Authority (MDTA) is an independent state agency responsible for financing, constructing, operating, and maintaining eight transportation facilities, currently consisting of two toll roads, two tunnels, and four bridges in Maryland. It also provides the Maryland Department of Transportation with financing for other revenue producing transportation projects.
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Media related to Baltimore Harbor Tunnel at Wikimedia Commons