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Vista Ridge Tunnels
The Vista Ridge Tunnels are highway tunnels through the Tualatin Mountains ("West Hills") of Portland, Oregon, United States. Located in the Goose Hollow neighborhood, the tunnels pass through a hillside locally known as Vista Ridge which is a half mile (1 km) west of downtown Portland. Sunset Highway, also known as U.S. Route 26, is carried through the tunnels, three lanes in each direction. They are Oregon's busiest tunnels. The eastbound tunnel is 1001 feet (305 m) in length; the westbound tunnel is 949 feet (289 m). Both have 41 ft (12.5 m) of horizontal and 15.58 ft (4.75 m) of vertical clearance. The eastbound tunnel was completed in 1969, the westbound a year later. There is a six-percent grade through the tunnels. Most of the tunnels' lengths are straight, though they curve southward at the west ends 35°. The tunnels were built with ventilation shafts which were never used. Instead, the shafts were later adapted for electrical wiring, so as to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland, Oregon
Portland (, ) is a port city in the Pacific Northwest and the largest city in the U.S. state of Oregon. Situated at the confluence of the Willamette and Columbia rivers, Portland is the county seat of Multnomah County, the most populous county in Oregon. Portland had a population of 652,503, making it the 26th-most populated city in the United States, the sixth-most populous on the West Coast, and the second-most populous in the Pacific Northwest, after Seattle. Approximately 2.5 million people live in the Portland metropolitan statistical area (MSA), making it the 25th most populous in the United States. About half of Oregon's population resides within the Portland metropolitan area. Named after Portland, Maine, the Oregon settlement began to be populated in the 1840s, near the end of the Oregon Trail. Its water access provided convenient transportation of goods, and the timber industry was a major force in the city's early economy. At the turn of the 20th century, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of Transportation
The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the President of the United States and is a member of the president's Cabinet. The department's mission is "to develop and coordinate policies that will provide an efficient and economical national transportation system, with due regard for need, the environment, and the national defense." History Prior to the creation of the Department of Transportation, its functions were administered by the under secretary of commerce for transportation. In 1965, Najeeb Halaby, administrator of the Federal Aviation Agency (predecessor to the Federal Aviation Administration, FAA), suggested to President Lyndon B. Johnson that transportation be elevated to a cabinet-level post, and that the FAA be folded into the DOT. It was established by Congress in the Department of Transportation Act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Tunnels By Location
The list of tunnels includes any road tunnel, railway tunnel or waterway tunnel anywhere in the world. Afghanistan * Salang Tunnel Albania Andorra * Envalira Tunnel, road * Pont Pla Tunnel, 1.26 km, road * Sant Antoni Tunnel, 280 m, road * Dos Valires Tunnel, 3 km, road Argentina * Cristo Redentor Tunnel * Raúl Uranga – Carlos Sylvestre Begnis Subfluvial Tunnel Australia Austria Azerbaijan * Ziya Bunyadov tunnel Baku * Darnagul tunnel Baku * 20 January tunnel Baku * Kalbajar Tunnel Belgium Brazil Bulgaria Canada Chile People's Republic of China Specifically notable tunnels in the People's Republic of China include: * Line 6 (Chengdu Metro), 68.2 km (42.4 mi), longest metro/rapid transit tunnel * Wushaoling Tunnel, 21 km long dual bore railway * Zhongnanshan Tunnel, 18 km long dual bore roadway * Fenghuoshan tunnel, at 5 km above sea level, the highest elevation rail tunnel in the world Colombia * Tunel de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lincoln Tunnel
The Lincoln Tunnel is an approximately tunnel under the Hudson River, connecting Weehawken, New Jersey, to the west with Midtown Manhattan in New York City to the east. It carries New Jersey Route 495 on the New Jersey side and unsigned New York State Route 495 on the New York side. It was designed by Ole Singstad and named after Abraham Lincoln. The tunnel consists of three vehicular tubes of varying lengths, with two traffic lanes in each tube. The center tube contains reversible lanes, while the northern and southern tubes exclusively carry westbound and eastbound traffic, respectively. The Lincoln Tunnel was originally proposed in the late 1920s and early 1930s as the Midtown Hudson Tunnel. The tubes of the Lincoln Tunnel were constructed in stages between 1934 and 1957. Construction of the central tube, which originally lacked sufficient funding due to the Great Depression, started in 1934 and it opened in 1937. The northern tube started construction in 1936, was delayed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glenn L
Glenn may refer to: Name or surname * Glenn (name) * John Glenn, U.S. astronaut Cultivars * Glenn (mango) * a 6-row barley variety Places In the United States: * Glenn, California * Glenn County, California * Glenn, Georgia, a settlement in Heard County * Glenn, Illinois * Glenn, Michigan * Glenn, Missouri * University, Orange County, North Carolina, formerly called Glenn * Glenn Highway in Alaska Organizations *Glenn Research Center, a NASA center in Cleveland, Ohio See also * New Glenn New Glenn is a heavy-lift orbital launch vehicle in development by Blue Origin. Named after NASA astronaut John Glenn, design work on the vehicle began in 2012. Illustrations of the vehicle, and the high-level specifications, were initial ..., a heavy-lift orbital launch vehicle * * * Glen, a valley * Glen (other) {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstate Bridge
The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge, Vancouver-Portland Bridge) is a pair of nearly identical steel vertical-lift, Parker through-truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington and Portland, Oregon in the United States. The bridge opened to traffic in 1917 as a single bridge carrying two-way traffic. A second, twin bridge opened in 1958 with each bridge carrying one-way traffic. The original 1917 structure is the northbound bridge. As of 2006, the bridge pair handles around 130,000 vehicles daily. The green structure, which is over long, carries traffic over three northbound lanes and three southbound lanes. It was added to the National Register of Historic Places in 1982, as the "Portland–Vancouver Highway Bridge". Since 2005, proposals for replacing the bridge have been produced and debated. The bridge is considered responsible for traffic conges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Temperature
Color temperature is the color of light emitted by an idealized opaque, non-reflective body at a particular temperature measured in kelvins. The color temperature scale is used to categorize the color of light emitted by other light sources regardless of their temperature. Color temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and other fields. In practice, color temperature is meaningful only for light sources that do in fact correspond somewhat closely to the color of some black body, i.e., light in a range going from red to orange to yellow to white to bluish white; it does not make sense to speak of the color temperature of, e.g., a green or a purple light. Color temperature is conventionally expressed in kelvins, using the symbol K, a unit of measure for absolute temperature. Color temperatures over 5000 K are called "cool colors" (bluish) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KATU
KATU (channel 2) is a television station in Portland, Oregon, United States, affiliated with ABC. It is owned by Sinclair Broadcast Group alongside La Grande–licensed Univision affiliate KUNP (channel 16). Both stations share studios on NE Sandy Boulevard in Portland, while KATU's transmitter is located in the Sylvan-Highlands section of the city. KATU went on the air as the fourth commercial station in Portland in 1962. It was built by Fisher Broadcasting Company, later Fisher Communications, and originally served as an independent station before joining ABC in 1964. History Channel 2 comes to Portland Channel 2 was not initially assigned to Portland, being allocated in 1957. That action spurred activity on the valuable frequency. Four applications were initially received, from ''The Oregon Journal'', owner of KPOJ (1330 AM); Fisher Broadcasting Company, which owned KOMO-AM-KOMO-TV in Seattle; Tribune Publishing Company, owner of KTNT-TV in Tacoma, Washington; and KP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Real-time Data
Real-time data (RTD) is information that is delivered immediately after collection. There is no delay in the timeliness of the information provided. Real-time data is often used for navigation or tracking. Such data is usually processed using real-time computing although it can also be stored for later or off-line data analysis. Real-time data is not the same as dynamic data. Real-time data can be dynamic (e.g. a variable indicating current location) or static (e.g. a fresh log entry indicating location at a specific time). In economics Real-time economic data, and other official statistics, are often based on preliminary estimates, and therefore are frequently adjusted as better estimates become available. These later adjusted data are called "revised data". The terms real-time economic data and real-time economic analysis were coined by Francis X. Diebold and Glenn D. Rudebusch. Macroeconomist Glenn D. Rudebusch defined real-time analysis as 'the use of sequential information se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAX Light Rail
The Metropolitan Area Express (MAX) is a light rail system serving the Portland metropolitan area in the U.S. state of Oregon. Owned and operated by TriMet, it consists of five color-designated lines that altogether connect the six sections of Portland; the communities of Beaverton, Clackamas, Gresham, Hillsboro, Milwaukie, and Oak Grove; and Portland International Airport to Portland City Center. Service runs seven days a week with headways of between 30 minutes off-peak and three minutes during rush hours. In 2019, MAX had an average daily ridership of 120,900, or 38.8 million annually. Due to the COVID-19 pandemic, which impacted public transit use globally, annual ridership plummeted, with only 14.8 million riders recorded in 2021. MAX was among the first second-generation American light rail systems to be built, conceived from freeway revolts that took place in Portland in the early 1970s. Planning for the network's inaugural eastside segment, then re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robertson Tunnel
The Robertson Tunnel is a twin-bore light rail tunnel through the Tualatin Mountains west of Portland, Oregon, United States, used by the MAX Blue and Red Lines. The tunnel is long'' Light Rail and Modern Tramway'', November 1993, p. 302. UK: Ian Allan Publishing/ Light Rail Transit Association. and consists of twin tunnels. There is one station within the tunnel at Washington Park, which at deep is the deepest subway station in the United States and the fifth-deepest in the world. Trains are in the tunnel for about 5 minutes, which includes a stop at the Washington Park station. The tunnel has won several worldwide engineering and environmental awards. It was placed into service September 12, 1998. The tunnels pass through basalt layers up to 16 million years old. Due to variations in the rock composition, the tunnel curves mildly side to side and up and down to follow the best rock construction conditions. The tunnels vary from 80 to 300 feet (24–91 m) below the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vista Bridge
The Vista Bridge (officially, Vista Avenue Viaduct) is an arch bridge for vehicles and pedestrians located in Portland, Oregon, United States. It connects the areas of King's Hill and Vista Ridge (the entire southern hillside is also referred to as Portland Heights) which are both in the Goose Hollow neighborhood. The MAX Light Rail line and Jefferson Street/Canyon Road travel under the bridge, and Vista Avenue crosses the bridge. History and description The ravine the Vista Bridge passes over was carved out by Tanner Creek and is referred to as the Tanner Creek Canyon (the source of the name for Canyon Road), which was called "The Great Plank Road". Tanner Creek was diverted underground beginning in the 1870s with work completed in the early 1900s. The creek still runs underground beneath the Vista Bridge, although it now drains the surrounding hillside via storm drains and a culvert to the Willamette River. The bridge has four pedestrian balconies, or "refuge bays" (exten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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