Resource Glossary EAST LINK Light Rail Illustrative Glossary Terms At-grade couplet Route located on two parallel roadways in which one direction runs on one road and one direction on the other road. Both routes are at street level. At-grade/Surface Route located at street level. Bored Tunnel Excavation of a tunnel or underground passage by way of a large drilling machine. When a tunnel is bored, surface disturbance is typically limited to stations and portals. Commuter rail Also known as Sounder in the Central Puget Sound region. A form of daily long distance travel by rail mostly during peak commuting hours. Tracks are usually shared with freight or long-distance passenger trains (Amtrak) and are run by either electric or diesel power (diesel in our region). Typically there is one station in each town or city.
Elevated/Aerial Structure Structure that is raised above the ground; a bridge. Column/Pier A column or pier provides structural support to an elevated structure. (Tukwila elevated track) Grade-separated Separation of transportation facilities, such as streets and rail lines, in order to eliminate potential conflicts for right-of-way travel. Guideway Trackway of an exclusive rail facility dedicated to the conveyance of train vehicles.
Mezzanine An intermediate floor between main floors of a building. In an elevated train station, the mezzanine would allow for the connection of two loading platforms without the need for crossing railroad tracks and could include ticket dispensing machines, information kiosks and rest areas. Operations and Maintenance (O&M) Facility Facility designed for the storage and maintenance of transit vehicles. An O & M facility for light rail operations for East Link may be 10 to 20 acres in size and include tracks for outside storage and a building for maintenance and cleaning of vehicles, as well as tracks leading to and from the facility to the main line. Overhead catenary system (OCS) System of overhead contact wires that supplies electrical power to a light rail car. Platform Can be located on either side of rail tracks or between them. Customers use platforms to enter or disembark trains. Platforms may have ticket vending machines, maps and schedules available.
113TH AVE SE 123RD AVE SE NE S E A T T L E 112TH AVE NE 112TH AVE NE WAY SE BOREN AVE E MADISON ST 23RD AVE NE 12TH ST NE 6TH ST AVE NE NE 8TH ST H AVE NE Lake Washington E CHERRY ST International District/ Chinatown Station E YESLER WAY MAIN ST BELLEVUE 108TH AVE SE S JACKSON ST Segment A 23RD AVE S A1 1ST AVE S 4TH AVE S AIRPORT WAY S 72ND AVE SE 76TH AVE SE LUTHER Mercer Island Park & Ride BURBANK PARK Segment A S SPOKANE ST RAINIER AVE S BEACON AVE S M L KING JR WAY S LAKE WASHINGTON BLVD W MERCER WAY 78TH AVE SE SE 40TH ST M E R C E R I S L A N D SE 36TH ST E MERCER WAY To Sea-Tac Airport ISLAND CREST WY 341526.P1.09.01.EN_TB072006007SEA_Scoping_Report/Maps/Routes_For_EIS/Segment_A_Alt_DEIS_012507. gr Retained cut A trench; the retention of an excavated area or land by way of a reinforced or stabilized wall in order to create space for a road, structure or train tracks. Segment A I-90: from the International District/Chinatown Station in Seattle across Mercer Island to the east side of Lake Washington. 104TH AVE SE B1 BELLEVUE WAY SE SE 6TH ST B2-A 108TH AVE SE B2-A Mercer Slough West 112TH AVE SE B2-E Wilburton Park & Ride SE B2-E Slough Mercer East 8TH ST MERCER SLOUGH NATURE PARK 118TH AVE SE Kelsey LAKE Creek HILLS CONNECTOR RD BELLEVUE WAY NE NE 12TH ST NE 10TH ST NE 8TH ST NE 6TH ST 106TH AVE 108TH AVE NE Bellevue Transit Center 110TH AVE NE 116TH AVE NE NE 12TH ST Lake Bellevue NE 8TH ST BELLEVUE WAY SE C1-T C2-T NE 4TH ST NE 4TH ST Lake Washington SE 25TH ST B E A U X A R T S Segment A 106TH AVE SE B1 B2-A B2-E B1 B2-A South Bellevue Park & Ride 341526.P1.09.01.EN_TB072006007SEA_Scoping_Report/Maps/Routes_For_EIS/Segment_B_Alts_DEIS_031907. gr Adjacent Segment Route Profile A B Segment Limit At-Grade City Limits Elevated 0 0.125 0.25 Proposed Station 108TH AVE SE SE 34TH ST B2-E Mercer Slough East Mile MERCER SLOUGH NATURE PARK MERCER SLOUGH NATURE PARK Source: King County (2006) modified by CH2M HILL Exhibit: Alternatives to be Evaluated in the DEIS East Link Project South Bellevue: from the east side of Lake Washington through South Bellevue to SE 6th Street in Bellevue. C1-T C2-T BELLEVUE WAY NE NE 2ND ST MAIN ST SE 6TH ST 108TH AVE NE C2-T Adjacent Segment Tunnel B C Segment Limit Retained Cut C 0 0.125 0.25 Mile to be Evaluated in the DEIS City Limits At-Grade East Link Project Proposed Station Elevated Downtown Bellevue: from SE 6th Street through downtown Bellevue to the east side of I-405. Sturtevant Creek C2-T C2-T 341526.P1.09.01.EN_TB072006007SEA_Scoping_Report/Maps/Routes_For_EIS/Segment_C_Alts_DEIS_032007. gr Source: King Country (2006) Route Profile Exhibit: Alternatives 114TH AVE NE 116TH AVE NE
130TH AVE NE RD 134TH AVE NE NE 40TH ST Valley Creek Segment E R E D M O N D 520 Overlake Transit Center OLD REDMOND E1 154TH AVE NE Samamish River E4 ") NE 83RD ST Redmond Park & Ride LEARY WAY NE 164TH AVE NE Bear Creek 166TH AVE NE R E D M O N D E2 E1 E4 BEAR CREEK PKWY NE 80TH ST NE REDMOND WAY RD AVONDALE NE Bear Creek NE 76TH S 116TH AVE NE NE 16TH ST 120TH NE AVE 520 West Tributary NORTHUP WAY Goff Creek NE 20TH ST NE 24TH ST Sears Creek 148TH AVE NE 151ST AVE NE " 152ND AVE NE Overlake Park & Ride 156TH AVE NE 152ND AVE NE E1 E2 E4 E2 E1 E4 NE 12TH ST of Kelsey Creek 124TH AVE NE 132ND AVE NE 136TH PL NE NE BELLEVUE - REDMOND RD Kelsey Creek 140TH AVE NE Kelsey Creek WEST LAKE SAMMAMISH Sammamish River PARKWAY NE MARYMOOR PARK 341526.P1.09.01.EN_TB072006007SEA_Scoping_Report/Maps/Routes_For_EIS/Segment_D_Alts_DEIS_012507. gr Source: King County (2006) Bel-Red Corridor: from NE 12th Street and 116th Avenue NE to the Overlake Transit Center. 520 156TH AVE NE NE 51ST ST Lake Sammamis Segment E NE 40TH ST 172ND AVE NE Overlake Transit Center 341526.P1.09.01.EN_TB072006007SEA_Scoping_Report/Maps/Routes_For_EIS/Segment_E_Alts_DEIS_012507. gr Source: King County ( Segment E Redmond: from north of the Overlake Transit Center to downtown Redmond. Staging Area A temporary site used for the storing and staging of construction equipment and material. (Beacon Hill Station) Subway An underground railway.
Tunnel Portal Exiting or entry way of a tunnel. Textual Glossary Terms Alignment Route or path of the train. Boardings Number of individuals boarding or getting on a train. If you took one train to and from a destination, you would make two (2) boardings during your round-trip. Catenary Overhead contact wire that supplies electrical power to a light rail car. Conceptual engineering Initial design steps in a project. Generally taken to represent a 5-10% level of design. Corridor Generalized travel or transportation path. The area on either side of a transportation facility. Cut-and-cover construction Method for constructing tunnels, underground stations or other underground facilities close to the surface by excavating from above and then covering the opening with a permanent lid. Density Number of units in a given area. For example, 100 residential units per acre may be considered a very densely developed acre of land.
Environmental Impact Statement (EIS) Public document that discloses and evaluates the potential environmental impacts of a proposed project. The EIS may be subject to State or Federal requirements. Final design Preceding actual construction, this final step of engineering design moves the project to the 100% design, ready for construction. GMA Growth Management Act. Adopted by the State of Washington to manage projected growth in a coordinated and planned fashion and direct growth to designated areas based on an area s ability to support said growth. Grade Grade or steepness of a natural or man-made incline or hill. HCT High Capacity Transit. A form of public mass transit systems capable of moving large numbers of passengers along a dedicated right-of-way. Light Rail Light rail is an electric railway powered by an overhead power source. Light rail is versatile and flexible enough to run at street level, through tunnels, or in elevated right-of-way, depending on individual routes. level boarding Station boarding from a platform that is at the same level as the low floor of the train car or bus. Used so those in wheelchairs and strollers are easily and quickly accommodated (no steps needed) and to speed loading. Low-level platforms Station platforms that are typically 14 inches high. Mitigation Specific actions required and taken to reduce the scale, size or extent of an identified impact resulting from the implementation of a major construction project. One seat ride Trip that can be completed without transferring vehicles. Preliminary engineering Advances a design to the 30% design level and further develops the details for the project before final design commences. Profile/vertical alignment Determines whether an alignment is a tunnel, elevated structure or on surface level.
R8A The preferred alternative adapted by I-90 Two-Way Transit and HOV project. This alternative provides HOV lanes in two existing outer roadways of the I-90 floating bridge creating two-way, all-day HOV lanes for transit and carpools. Regional Transportation Investment District/RTID Entity created by the Washington State Legislature and charged with developing a transportation package to be submitted to voters in the fall of 2007 for improving significant highways and bridges in Snohomish, King or Pierce Counties. RTID is coordinating its work with Sound Transit, which will submit a companion transit proposal to voters. Ridership Number of passengers who ride public transport systems. Right-of-way Easement or strip of land dedicated to public transportation uses and facilities. Roads & Transit Partnership Joint effort by Sound Transit and the Regional Transportation Investment District (RTID) to create the first-ever integrated set of highway, bridge and transit improvements for Snohomish, King and Pierce counties. Route Systematically assigned line or course of travel for a specific area or territory. Sound Transit Board of Directors 18-member appointed governing body of the Central Puget Sound Regional Transit Authority (Sound Transit). The Board establishes policy, provides direction, and performs oversight. Sound Transit is governed by an 18-member Board of Directors; 17 members are local elected officials, and the 18th member is the Washington State Department of Transportation Secretary. Local elected officials include mayors, city council members, county executives, and county council members from within the Sound Transit District. Currently, the Sound Transit Board includes three members from Snohomish County, ten from King County, four from Pierce County, and the State Transportation Department secretary. The Board of Directors are: John W. Ladenburg, Executive, Pierce County Connie Marshall, Councilmember, City of Bellevue, Mark G. Olson VP, City of Everett Council Julie Anderson, Councilmember, City of Tacoma, Mary-Alyce Burleigh, Councilmember, City of Kirkland Fred Butler, Deputy Council President, City of Issaquah Dow Constantine, Councilmember, King County Council David Enslow, Mayor, City of Sumner Doug MacDonald, Secretary, WSDOT Richard L. Marin, Councilmember, City of Edmonds Richard J. McIver, Councilmember, City of Seattle Greg Nickels, Mayor, City of Seattle Julia Patterson, Council Vice Chair, King County Council Larry Phillips, Councilmember, King County Council Aaron Reardon, County Executive, Snohomish County Ron Sims, County Executive, King County Claudia Thomas, Mayor, City of Lakewood Peter von Reichbauer, Councilmember, King County Council
Straddle Bent On an elevated structure, straddle bent is a bridge structure that straddles both sides of the street. Used when elevated light rail makes a turn. ST2 Sound Transit 2. The second phase of regional transit investments for the Central Puget Sound. Traffic signal pre-emption Ability to over-ride traffic signals in order to give priority to approaching vehicles, such as emergency vehicles. Also used in light rail systems operating at surface level. Traffic signal priority Allows specially equipped buses or trains to communicate with an approaching traffic signal and ask it to hold the green light for a bus or train. A transponder installed on the bus or train sends a signal to a controller on the traffic light. Transition structure Structure or ramp designed to transition trains from an at-grade facility to an elevated facility. Trips (are one way) Recorded one-way travel via public or private vehicle from the origin of the trip to a destination. Urban Design Concerns the arrangement, appearance and functionality of towns, cities and urban open spaces. WSDOT Washington State Department of Transportation.