Mt. Washington Transit Tunnel
   HOME

TheInfoList



OR:

The Mount Washington Transit Tunnel is a tunnel for buses and light rail trains under
Mount Washington Mount Washington is an ultra-prominent mountain in the state of New Hampshire. It is the highest peak in the Northeastern United States at and the most topographically prominent mountain east of the Mississippi River. The mountain is notorio ...
in
Pittsburgh Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the List of municipalities in Pennsylvania#Municipalities, second-most populous city in Pennsylvania (after Philadelphia) and the List of Un ...
,
Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...
. The Mount Washington Transit Tunnel is a central component of the Pittsburgh public transit system operated by
Pittsburgh Regional Transit Pittsburgh Regional Transit (PRT) is the public agency responsible for most public transportation services in the Greater Pittsburgh region in Pennsylvania. It is the second-largest public transit agency in Pennsylvania and the 20th-largest in ...
, providing a direct connection between Downtown Pittsburgh and the South Hills suburbs. The tunnel was built for the trolley services of
Pittsburgh Railways Pittsburgh Railways was one of the predecessors of Pittsburgh Regional Transit. It had 666 PCC streetcar, PCC cars, the third largest fleet in North America (after Toronto Transit Commission, Toronto (745) and Chicago Surface Lines, Chicago (683) ...
, the predecessor of the modern-day Pittsburgh Light Rail system, and has been used exclusively for public transit since its construction. The tunnel, formerly known as the Mount Washington Trolley Tunnel, opened for trolleys in 1904, and was converted to a shared rail-bus tunnel in 1973. It has been the only transit-only tunnel shared by rail and buses since 2019, when the
Downtown Seattle Transit Tunnel The Downtown Seattle Transit Tunnel (DSTT), formerly also known as the Metro Bus Tunnel, is a pair of public transit tunnels in Seattle, Washington, United States. The double-track tunnel and its four stations serve Link light rail trains ...
closed to buses. The construction of the Mount Washington Transit Tunnel was instrumental in the development of the South Hills, as it shortened travel times to Downtown Pittsburgh significantly. Today, the tunnel still provides a significant time savings for transit services; the alternate surface route for light rail trains, the former Brown Line, adds over 8 minutes of travel time compared to the tunnel.


Services

The Mount Washington Transit Tunnel is used by light rail trains and local, regional, and express bus services. All trains and most buses stop at the Station Square and South Hills Junction stations at either end of the tunnel. The tunnel is served by all currently operating lines of the Pittsburgh Light Rail system: the
Red Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet. It has a dominant wavelength of approximately 625–750 nanometres. It is a primary color in the RGB color model and a seconda ...
,
Blue Blue is one of the three primary colours in the RYB color model, RYB colour model (traditional colour theory), as well as in the RGB color model, RGB (additive) colour model. It lies between Violet (color), violet and cyan on the optical spe ...
, and
Silver Silver is a chemical element; it has Symbol (chemistry), symbol Ag () and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. ...
Lines, and the Subway Local shuttle service. , the tunnel is also used by 15 bus routes, including 10 routes operated by PRT and 5 by other carriers.


Pittsburgh Regional Transit bus


Other bus carriers


History


Background

The City of Pittsburgh was incorporated in 1816, and the suburbs of the South Hills developed quickly in the late 19th century. As development progressed, demand grew for better transport options over Mount Washington, a significant geographical obstacle between the coal-rich South Hills and the city. The
Pittsburgh and Castle Shannon Railroad The Pittsburgh and Castle Shannon Railroad was a narrow-gauge railroad in Allegheny County, Pennsylvania. Originally built in 1871, it may have been the first American common-carrier narrow-gauge railroad. It purchased a rail line called the C ...
began operating through service across Mount Washington in 1874, using two pieces of former coal transport infrastructure. Steam-powered commuter trains from Castle Shannon ran through the mountain via the
Pittsburgh and Castle Shannon Tunnel The Pittsburgh and Castle Shannon Tunnel, also known as the Mount Washington Coal Tunnel, was a narrow-gauge railway tunnel under Mt. Washington. History This tunnel was originally begun as a coal mine in 1825 by Jacob Beltzhoover. The min ...
, a former coal mine converted to a
narrow-gauge railroad A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge (distance between the rails) narrower than . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with tighter curv ...
tunnel. Trains through the tunnel connected passengers to the
Pittsburgh and Castle Shannon Plane The Pittsburgh and Castle Shannon Plane was a narrow gauge incline railway that ran from the northern end of the Pittsburgh and Castle Shannon Tunnel to Carson Street in Pittsburgh, Pennsylvania. History and notable features Originally built to ...
on Mount Washington's northern face. In the early 1890s, the P&CS built the Castle Shannon Incline No. 1 and No. 2 on the respective southern and northern slopes of Mount Washington, removing the need for the narrow, dark, and smoky tunnel. Local transport services within Pittsburgh city limits were powered by horses from the 1840s onward, first with horsebuses running on wooden wheels, and later horsecars with steel wheels on steel rails. Cable cars and electric trolleys debuted in the city the late 1880s, causing a revolution in land use and transport policy, but by the end of the 19th century, the inclines on Mount Washington were the best technology for their geography. The inclines began the process of integrating the formerly isolated neighborhood of Mount Washington with the rest of the city, and the advent of electric trolley service would continue the process of the expansion of the City of Pittsburgh. Less than 20 years after the introduction of the electric trolley, in January 1902, the
Pittsburgh Railways Company Pittsburgh Railways was one of the predecessors of Pittsburgh Regional Transit. It had 666 PCC cars, the third largest fleet in North America (after Toronto (745) and Chicago (683)). It had 68 streetcar routes, of which only three (until April ...
was formed as a consolidation of multiple
electric trolley A current collector (often called a "pickup") is a device used in trolleybuses, trams, electric locomotives and EMUs to carry electric power ( current) from overhead lines, electric third rails, or ground-level power supplies to the electric ...
and
interurban The interurban (or radial railway in Canada) is a type of electric railway, with tram-like electric self-propelled railcars which run within and between cities or towns. The term "interurban" is usually used in North America, with other terms u ...
operators. The Pittsburgh Railways represented technological advancement in the transport business, a notable contrast with the Pittsburgh and Castle Shannon Railroad. The P&CS chose not to electrify its lines, as it was a
vertically integrated In microeconomics, management and international political economy, vertical integration, also referred to as vertical consolidation, is an arrangement in which the supply chain of a company is integrated and owned by that company. Usually each ...
company which produced high-quality coal from mines it owned. It instead chose to continue burning coal to power its steam locomotives and inclines.


Construction

At the turn of the 20th century, two related but competing firms sought to build a tunnel for trolleys through Mount Washington.
Political boss In the politics of the United States of America, a boss is a person who controls a faction or local branch of a political party. They do not necessarily hold public office themselves; most historical bosses did not, at least during the times of th ...
William Flinn William Flinn (1851–1924) was a powerful political boss and construction magnate in Pittsburgh, Pennsylvania, United States. Along with Christopher Magee (1848–1901), his political partner, the two ran the Republican Party machine that co ...
controlled Pittsburgh politics during the late 19th century, and two companies were granted a state charter to construct a tunnel through Mount Washington for electric trolleys. The two companies, the Mount Washington Tunnel Company and the Pittsburg Tunnel Company (an affiliate of Flinn-owned Beechwood Improvement Company), became engaged in a legal dispute in April 1902. The Mount Washington Tunnel Co. hired Flinn-founded construction firm
Booth and Flinn Booth and Flinn (1876–1950) was one of the largest American general contracting companies of its era. It was established during the nineteenth century and was headquartered in Pittsburgh, Pennsylvania, United States. History Founded by Willi ...
to construct its tunnel, and it came into conflict with the Pittsburg Tunnel Co. about which firm could proceed with building its tunnel. In 1903, Pittsburgh Railways intervened and took control of the project, investing millions of dollars into the Mount Washington Tunnel Co. and settling the dispute with the Pittsburg Tunnel Co. Construction proceeded at a rapid pace, with workers working six days a week to bore through the solid rock of the Casselman Formation. Once the boring of the tunnel was complete, construction began on the lining and the rails, using 12 million bricks. Tests of trolleys through the tunnel began in late 1904, and service through the tunnel began on December 1, 1904.


Pittsburgh Railways era (1904–1964)

Pittsburgh Railways, the tunnel's operator, was never a money-making enterprise. From its inception, it was financially backed by The Philadelphia Company, a utility company founded by
George Westinghouse George Westinghouse Jr. (October 6, 1846 – March 12, 1914) was a prolific American inventor, engineer, and entrepreneurial industrialist based in Pittsburgh, Pennsylvania. He is best known for his creation of the railway air brake and for bei ...
that was the predecessor of
Equitable Gas EQT Corporation is an American energy company engaged in hydrocarbon exploration and pipeline transport. It is headquartered in EQT Plaza in Pittsburgh, Pennsylvania. EQT is the largest natural gas producer in the Appalachian Basin with 19.802 ...
and Duquesne Light. Investments from the United Railways Investment Company, a New Jersey firm, allowed Pittsburgh Railways to lease the Pittsburgh and Castle Shannon Railroad beginning in 1905. Pittsburgh Railways converted the P&CS' narrow-gauge main line to
dual gauge Dual gauge railroad track has three or four rails, allowing vehicles of two track gauges to run on it. Signalling and sidings are more expensive to install on dual gauge tracks than on two single gauge tracks. Dual gauge is used when there i ...
and
electrified Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source. In the context of history of technology and economic development, electrification refe ...
it, allowing its
Pennsylvania trolley gauge Originally, various track gauges were used in the United States. Some railways, primarily in the northeast, used standard gauge of ; others used gauges ranging from to . As a general rule, southern railroads were built to one or another broad ga ...
trolleys to operate during daytime alongside nighttime steam-powered coal trains. Service through the tunnel to Castle Shannon,
Charleroi Charleroi (, , ; ) is a city and a municipality of Wallonia, located in the province of Hainaut, Belgium. It is the largest city in both Hainaut and Wallonia. The city is situated in the valley of the Sambre, in the south-west of Belgium, not ...
, and
Washington Washington most commonly refers to: * George Washington (1732–1799), the first president of the United States * Washington (state), a state in the Pacific Northwest of the United States * Washington, D.C., the capital of the United States ** A ...
began in 1909, operating directly from the rural South Hills to Downtown Pittsburgh via the tunnel and the
Smithfield Street Bridge The Smithfield Street Bridge is a lenticular truss bridge crossing the Monongahela River in Pittsburgh, Pennsylvania, USA. The bridge was designed by Gustav Lindenthal, the engineer who later designed the Hell Gate Bridge in New York City. ...
. By 1910, Pittsburgh Railways was struggling financially. Its policy of a flat five-cent fare for all lines contributed to the difficulties, as short-distance passengers in city limits effectively subsidized long-distance passengers to outlying areas. The Pittsburgh City Council commissioned a report in 1910 on converting some trolley lines to
rapid transit Rapid transit or mass rapid transit (MRT) or heavy rail, commonly referred to as metro, is a type of high-capacity public transport that is generally built in urban areas. A grade separation, grade separated rapid transit line below ground su ...
, which was theorized to attract more passengers and reverse the downward trend of the trolley system. The 1910 plan was never implemented. Another plan, presented by city transit commissioner E. K. Morse in 1917, included the Mount Washington tunnel as a centerpiece of a loop of rapid transit elevated and subway lines connecting Downtown,
Swissvale Swissvale is a borough in Allegheny County, Pennsylvania, United States, east of downtown Pittsburgh. Named for a farmstead owned by James Swisshelm, during the industrial age it was the site of the Union Switch and Signal Company of George We ...
,
Homestead Homestead may refer to: *Homestead (building), a farmhouse and its adjacent outbuildings; by extension, it can mean any small cluster of houses * Nguni homestead, a cluster of houses inhabited by a single extended family, typically with a kraal ...
, Carrick, and Mount Oliver. On Christmas Eve 1917, an out-of-control trolley crashed at the tunnel's northern portal, killing 21 and injuring 80. The cost of the crash was stifling for Pittsburgh Railways, which entered
receivership In law, receivership is a situation in which an institution or enterprise is held by a receiver – a person "placed in the custodial responsibility for the property of others, including tangible and intangible assets and rights" – especia ...
from 1918 to 1924. The opening of the Liberty Tubes through Mount Washington in 1924 compounded these troubles, as automobile access through Mount Washington became easier and faster. Ridership briefly rebounded during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, but by the 1950s the Pittsburgh Railways system was growing smaller. The Washington and Charleroi interurban lines were retired in 1953, ending the through service that motivated the tunnel's construction. Local services through the tunnel continued, as Pittsburgh Railways converted more of its city trolley lines to buses in the 1950s.


Port Authority era (1964–2022)

The Port Authority of Allegheny County took over the Pittsburgh transit system, including Pittsburgh Railways and dozens of privately-owned bus companies, in 1964. The Port Authority converted more trolley lines to buses, and by 1971, the only remaining trolleys were the
Drake Drake may refer to: Animals and creatures * A male duck * Drake (mythology), a term related to and often synonymous with dragon People and fictional characters * Drake (surname), a list of people and fictional characters with the family ...
,
Library A library is a collection of Book, books, and possibly other Document, materials and Media (communication), media, that is accessible for use by its members and members of allied institutions. Libraries provide physical (hard copies) or electron ...
, Castle Shannon,
Mount Lebanon Mount Lebanon (, ; , ; ) is a mountain range in Lebanon. It is about long and averages above in elevation, with its peak at . The range provides a typical alpine climate year-round. Mount Lebanon is well-known for its snow-covered mountains, ...
, and
Arlington Arlington most often refers to: *Arlington, Virginia **Arlington National Cemetery, a United States military cemetery *Arlington, Texas Arlington may also refer to: Places Australia *Arlington light rail station, on the Inner West Light Rail in S ...
lines. These services either used the Mount Washington tunnel, or had other exclusive rights-of-way such as bridges that were unsuitable for conversion. Pavement was added to the Mount Washington tunnel in the 1970s, allowing buses to use the tunnel. The
South Busway The South Busway is a two-lane bus rapid transit highway serving southern portions of the city of Pittsburgh. The busway runs for from the Mt. Washington Transit Tunnel across the Monongahela River from Downtown Pittsburgh to the Overbrook ...
, one of the first American examples of bus rapid transit, opened from South Hills Junction Station to Overbrook in 1977, connected to the tunnel's southern portal. By 1980, the tunnel was at capacity, with decades-old PCC trolleys sharing the tunnel with increasing numbers of buses. The construction of the South Busway and numerous
park and ride A park and ride, also known as incentive parking or a commuter lot, is a parking lot with public transport connections that allows commuters and other people heading to city centres to leave their vehicles and transfer to a bus, Rail transport, r ...
lots throughout the South Hills increased ridership substantially, with 1979 ridership levels increasing above the previous peak of 1946 on some lines in the South Hills. The Mount Washington tunnel became a key component of the new Pittsburgh Light Rail system when it was approved in 1980, succeeding the failed Skybus system. The light rail system rebuilt and improved the remaining trolley system, including the purchase of new rolling stock and the creation of a new trolley tunnel in Downtown Pittsburgh. As part of the Pittsburgh Light Rail construction, trolleys exiting the Mount Washington tunnel to the north were rerouted onto the
Panhandle Bridge The Panhandle Bridge (officially the Monongahela River Bridge) carries the three lines of the Port Authority Light Rail Network across the Monongahela River in Pittsburgh, Pennsylvania. The name comes from Pennsylvania Railroad subsidiary Pi ...
, and the tracks on the Smithfield Street Bridge were removed and paved over in 1985. Another major incident occurred in 1987, when a trolley entering the tunnel from the south experienced a brake failure. The trolley built up speed through the tunnel and left the rails at the north portal, riding on the pavement until it came to a stop on the southern approach of the Smithfield Street Bridge. 37 people were injured, with no fatalities.


Pittsburgh Regional Transit era (2022–present)

The Port Authority of Allegheny County rebranded itself as Pittsburgh Regional Transit in 2022. PRT continues to operate the Mount Washington tunnel for light rail and bus services. PRT announced in July 2024 that it would close the tunnel for 5 months in 2025 to replace concrete, rails, and electrical wiring. During the closure, trains will be rerouted onto the former Brown Line through Allentown, bypassing Station Square and resuming their normal route at First Avenue station.


Geology

The Mount Washington Transit Tunnel rises from Station Square to South Hills Junction through Mount Washington, a hill located in a moderately dissected region of the
Appalachian Plateau The Appalachian Plateau is a series of rugged dissected plateaus located on the western side of the Appalachian Mountains. The Appalachian Mountains are a range that run from Nova Scotia in Canada to Alabama in the United States. The Appalachi ...
. The tunnel passes through two
geological formations A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock expo ...
: the
Glenshaw Formation The Glenshaw Formation is a mapped sedimentary bedrock unit in Pennsylvania, Maryland, West Virginia, and Ohio, of Pennsylvanian age. It is the lower of two formations in the Conemaugh Group, the upper being the Casselman Formation. The boun ...
and the Casselman Formation, both part of the
Conemaugh Group The Conemaugh Group is a Group (geology), geologic group in West Virginia, Pennsylvania, Ohio, and Maryland. It preserves fossils dating back to the Carboniferous Period (geology), period. See also * List of fossiliferous stratigraphic units i ...
. The Ames Limestone member, a thin
marker bed Marker horizons (also referred to as chronohorizons, key beds or marker beds) are stratigraphic units of the same age and of such distinctive composition and appearance, that, despite their presence in separate geographic locations, there is no do ...
of limestone that uniquely identifies the youngest layer of
marine transgression A marine transgression is a geologic event where sea level rises relative to the land and the shoreline moves toward higher ground, resulting in flooding. Transgressions can be caused by the land sinking or by the ocean basins filling with water ...
in the area, is present at the tunnel's northern portal. From the northern portal at Station Square, the tunnel rises through the entire Casselman Formation, emerging at South Hills Junction. At the southern portal, the Pittsburgh Light Rail tracks rise above the Pittsburgh Formation, the layer of
coal Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other Chemical element, elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal i ...
that defined the early growth of Pittsburgh. High-quality coal from the Pittsburgh Formation powered the trains of the Pittsburgh and Castle Shannon Railroad, beginning the development of the South Hills and leading to the construction of the Mount Washington tunnel.


Incidents

Two spectacular runaway accidents are associated with the tunnel, which has a steep grade of approximately 6%. In both instances, trolleys entering from the south tunnel ran downhill, lost control, jumped the tracks at the north portal, and crashed.


1917 crash

A fatal incident occurred on
Christmas Eve Christmas Eve is the evening or entire day before Christmas, the festival commemorating nativity of Jesus, the birth of Jesus in Christianity, Jesus. Christmas Day is observance of Christmas by country, observed around the world, and Christma ...
1917, when a trolley on the Knoxville line crashed at the north portal of the Mount Washington tunnel. 23 people died as a result of the crash, and the resulting claims sent Pittsburgh Railways into receivership for years. The trolley involved in the 1917 crash, car #4236, a low-floor, double-ended trolley, was built as part of the Pittsburgh Railways 4200 series by the St. Louis Car Company in 1914. The 4200 series cars had a nominal passenger capacity of 55 seated and 29 standing, but the trolley on Christmas Eve was overloaded, with a total of 117 passengers onboard. After the trolley entered the tunnel from the south portal, the
trolley pole A trolley pole is a tapered cylindrical pole of wood or metal, used to transfer electricity from a "live" (electrified) overhead line, overhead wire to the control and the electric traction motors of a tram or trolley bus. It is a type of current ...
came off the
overhead line An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, Electric multiple unit, electric multiple units, trolleybuses or trams. The generic term used by the International Union ...
, cutting off power and stopping the car. The trolley was so crowded that the
conductor Conductor or conduction may refer to: Biology and medicine * Bone conduction, the conduction of sound to the inner ear * Conduction aphasia, a language disorder Mathematics * Conductor (ring theory) * Conductor of an abelian variety * Cond ...
could not leave his station to guide the trolley pole back onto the line, and an argument ensued between the conductor and the motorman about whose duty it was to adjust the pole. The argument continued for multiple minutes until the motorman of a trolley behind the Knoxville car exited his trolley and put the pole back on the wires. Once power was restored, the motorman of the Knoxville car accelerated at full speed, and the car reached a speed of nearly , five times the speed limit. The trolley failed to stop at the north portal of the tunnel, jumped the tracks, and overturned. 14 people died immediately, and the remaining wounded were taken to the nearby
Pittsburgh & Lake Erie Railroad Station The Pittsburgh & Lake Erie Railroad Station, now Landry's Grand Concourse restaurant in Station Square Plaza in Pittsburgh, Pennsylvania, is an historic building that was erected in 1898. It was listed on the National Register of Historic Place ...
Terminal Annex, which served as a makeshift hospital. A total of 23 people died in the crash.


1987 derailment

On October 29, 1987, a 1700-series all-electric PCC car began to exceed the tunnel's speed limit as it entered the south portal after departing South Hills Junction. The operator, realizing the car could neither stop nor take the sharp curve from the transitway to the
Panhandle Bridge The Panhandle Bridge (officially the Monongahela River Bridge) carries the three lines of the Port Authority Light Rail Network across the Monongahela River in Pittsburgh, Pennsylvania. The name comes from Pennsylvania Railroad subsidiary Pi ...
ramp, ordered all the passengers to move to the back, and radioed the PAT central dispatcher to clear
Station Square Station Square is a entertainment complex located in the South Shore neighborhood of Pittsburgh, Pennsylvania, United States. It sits across the Monongahela River from the Golden Triangle of downtown Pittsburgh. Station Square occupies the bu ...
. The car left the rails and took Smithfield Street instead (the trolleys' original route downtown, until 1985), crossing Carson Street, sideswiping a PAT bus and a truck, and knocking out a fire hydrant. Miraculously, the car stayed on its wheels, and finally stopped next to the Pittsburgh History & Landmarks Foundation, the former
Pittsburgh and Lake Erie The Pittsburgh and Lake Erie Railroad (P≤ ), also known as the "Little Giant", was formed on May 11, 1875. Company headquarters were located in Pittsburgh, Pennsylvania. The line connected Pittsburgh in the east with Youngstown, Ohio, in the ...
station building at Station Square. Thirty-seven people were injured, four seriously, but there were no fatalities. All three braking systems on the car had failed: the
drum The drum is a member of the percussion group of musical instruments. In the Hornbostel–Sachs classification system, it is a membranophone. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a ...
,
dynamic Dynamics (from Greek δυναμικός ''dynamikos'' "powerful", from δύναμις ''dynamis'' "power") or dynamic may refer to: Physics and engineering * Dynamics (mechanics), the study of forces and their effect on motion Brands and enter ...
, and
magnetic Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, m ...
rail brakes. Most of the 1700 series cars were found to have electrical defects, prompting PAT to retire all of their remaining PCC's that had not been rebuilt as 4000 series cars. Consequently, PAT was left with a shortage of cars, which contributed to the closure of the Overbrook line in 1993.


See also

*
Pittsburgh Railways Pittsburgh Railways was one of the predecessors of Pittsburgh Regional Transit. It had 666 PCC streetcar, PCC cars, the third largest fleet in North America (after Toronto Transit Commission, Toronto (745) and Chicago Surface Lines, Chicago (683) ...
* Pittsburgh Light Rail *
South Busway The South Busway is a two-lane bus rapid transit highway serving southern portions of the city of Pittsburgh. The busway runs for from the Mt. Washington Transit Tunnel across the Monongahela River from Downtown Pittsburgh to the Overbrook ...
*
Pittsburgh and Castle Shannon Tunnel The Pittsburgh and Castle Shannon Tunnel, also known as the Mount Washington Coal Tunnel, was a narrow-gauge railway tunnel under Mt. Washington. History This tunnel was originally begun as a coal mine in 1825 by Jacob Beltzhoover. The min ...


References


Footnotes


References


External links

* * - Southern portal * - Northern portal {{Pittsburgh Bridges, structure=tunnel Railroad tunnels in Pennsylvania Tunnels in Pittsburgh 5 ft 2½ in gauge railways in the United States