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L: Liter (49CFR171)

L&D: Loss and Damage (FHWA19)

L4: Automatic Lockup Four Speed (DOE6)

LAA: Local Airport Advisory (FAA20)

LAAS: Local Area Augmentation System (BTS10)

LAAS: Low Altitude Alert System (FAA20)

Laboring: The effect of shallow water on the sound or performance of the boat's engine. (TNDOT1)

LABS: Leased A B Service (FAA20)

LABS: Los Angeles Basin Study (FAA20)

LABSC: LABS GS-200 Computer (FAA20)

LABSR: LABS Remote Equipment (FAA20)

LABSW: LABS Switch System (FAA20)

LAC: Logical Access Control (FAA20)

LACMTA : Los Angeles County Metropolitan Transportation Authority (FTA5)

LACTC: Los Angeles County Transportation Commission (FTA5)

LACV: Lighter Air Cushioned Vehicle (MTMC1)

Lading: Refers to the freight shipped; the contents of a shipment. (MARAD2)

Lagoon: A shallow area of salt water separated from the open sea by sand or shingle banks. The sheet of water between an offshore reef, especially of coral, and the mainland. The sheet of water within a ring or horseshoe-shaped atoll. (DOI4)

LAGPS: Local Area Global Positioning System (FAA20)

LAHSO: Land and Hold Short Operations (FAA20)

Lake: Any standing body of inland water. (DOI4)

Lake/Pond: A standing body of water with a predominantly natural shoreline surrounded by land. (DOI3)

Lakewise Or Great Lakes Traffic: Waterborne traffic between U.S. ports on the Great Lakes system. The Great Lakes system is treated as a separate waterways system rather than as a part of the inland system. (BTS11)

Lamp: A device used to produce artificial light. (49CFR393)

LAN: Local Area Network (FAA20)

Land: To moor or bring a boat to the riverbank. (TNDOT1)

Land Area: Based on the U.S. Bureau of the Census definition, this includes dry land and land temporarily or partially covered by water, such as marshlands, swamps and river flood plains, systems, sloughs, estuaries and canals less than 1/8 of a statute mile (0.2 kilometers) in width and lakes, reservoirs and ponds less than 1/16 square mile (0.16 square kilometers) in area. [For Alaska, 1/2 mile (0.8 kilometers) and 1 square mile (2.60 square kilometers) are substituted for these values]. The net land area excludes areas of oceans, bays, sounds, etc., lying within the 3 mile (4.8 kilometers) U.S. jurisdiction as well as inland water areas larger than indicated above. (FHWA2)

Land Use: Refers to the manner in which portions of land or the structures on them are used, i.e. commercial, residential, retail, industrial, etc. (FHWA21)

Land Use Plan: A plan which establishes strategies for the use of land to meet identified community needs. (FHWA21)

Land Wall: The concrete wall that forms part of the lock and is nearest to the land on the shore on which the lock chamber is constructed. (TNDOT1)

Landbridge: An intermodal connection between two ocean carriers separated by a land mass, linked together in a seamless transaction by a land carrier. (MARAD1)

Landed Cost: The dollar per barrel price of crude oil at the port of discharge. Included are the charges associated with the purchase, transporting, and insuring of a cargo from the purchase point to the port of discharge. Not included are charges incurred at the discharge port (e.g., import tariffs or fees, wharfage charges, and demurrage charges). (DOE5)

Landed Weight: The weight of an aircraft providing scheduled and non-scheduled service of only property (including mail) in intrastate, interstate and foreign air transportation. (FAA11)

Landing Area: 1) Any locality either on land, water, or structures, including airports/heliports and intermediate landing fields, which is used, or intended to be used, for the landing and takeoff of aircraft whether or not facilities are provided for the shelter, servicing, or for receiving or discharging passengers or cargo. 2) That part of a movement area intended for the landing or takeoff of aircraft. (FAA4)

Landing Direction Indicator: A device which visually indicates the direction in which landings and takeoffs should be made. (FAA4)

Landing Distance Available: The runway length declared available for landing an airplane. (FAA12)

Landing Gear: Device that supports the front end of semitrailer when not attached to a tractor. (ATA1)

Landing Gear Extended Speed: The maximum speed at which an aircraft can be safely flown with the landing gear extended. (14CFR1)

Landing Gear Operating Speed: The maximum speed at which the landing gear can be safely extended or retracted. (14CFR1)

Landing Minimums: The minimum visibility prescribed for landing a civil aircraft while using an instrument approach procedure. The minimum applies with other limitations set forth in Federal Aviation Regulation Part 91 with respect to the Minimum Descent Altitude (MDA) or Decision Height (DH) prescribed in the instrument approach procedures as follows: 1) Straight-in landing minimums. A statement of MDA and visibility, or DH and visibility, required for a straight-in landing on a specified runway, or 2) Circling minimums. A statement of MDA and visibility required for the circle-to-land maneuver. Descent below the established MDA or DH is not authorized during an approach unless the aircraft is in a position from which a normal approach to the runway of intended landing can be made and adequate visual reference to required visual cues is maintained. (FAA4)

Landing Place: A place for loading and unloading passengers or cargo to and from water vessels. (DOI4)

Landing Rights Airports: Any aircraft may land at one of these airports after securing prior permission to land from U.S. Customs. (FAA2)

Landing Roll: The distance from the point of touchdown to the point where the aircraft can be brought to a stop or exit the runway. (FAA4)

Landing Sequence: The order in which aircraft are positioned for landing. (FAA4)

Landing Signal: A prearranged signal which the towboats of some companies sound when approaching their dock. (TNDOT1)

Landscaping: Colloquial term meaning to clear shore structure of brush and vegetation in order to obtain optimum range of visibility. (TNDOT1)

Lane: A portion of a street or highway, usually indicated by pavement markings, that is intended for one line of vehicles. (TRB1)

Lane-Miles: One mile of one lane of road. (BTS14)

Large Air Carrier: Scheduled and nonscheduled aircraft operating under Federal Aviation Regulations (FAR) Parts 121, 125, or 127. Note: Part 129 foreign air carriers are not included in the National Transportation Safety Board (NTSB) accident data base, nor are hour and departure data available for these air carriers. (FAA3)

Large Air Traffic Hub: A community enplaning 1.00 percent or more of the total enplaned passengers in all services and all operations for all communities within the 50 States, the District of Columbia, and other U.S. areas designated by the Federal Aviation Administration. (FAA2) (FAA14) (FAA15)

Large Aircraft: Aircraft of more than 12,500 pounds, maximum certificated takeoff weight. (14CFR1)

Large Aircraft Commercial Operator: Commercial operator operating aircraft of more than 12,500 pounds maximum certificated takeoff weight. (FAA9)

Large Car: As designated by the automobile industry, a car with a wheelbase greater than 115 inches. (BTS11)

Large Certificated Air Carriers: An air carrier holding a certificate issued under section 401 of the Federal Aviation Act of 1958, as amended, that: 1) Operates aircraft designed to have a maximum passenger capacity of more than 60 seats or a maximum payload capacity of more than 18,000 pounds, or 2) Conducts operations where one or both terminals of a flight stage are outside the 50 states of the United States, the District of Columbia, the Commonwealth of Puerto Rico, and the U.S. Virgin Islands. Large certificated air carriers are grouped by annual operating revenues: 1) Majors (more than $1 billion in annual operating revenues), 2) Nationals (between $100 million and $1 billion in annual operating revenues), Large regionals ($20 million and $99,999,999 in annual operating revenues), and 4) Medium regionals (less than $20 million in annual operating revenues). (BTS11)

Large Fleet: A fleet of 2,000 or more reportable vehicles, domestic or foreign for which accountability is held by a department, independent establishment, bureau, or a comparable organizational unit of that department or independent establishment. (GSA1)

Large Regionals (Air): Air carrier groups with annual operating revenues between $20 million and $99,999,999. (BTS11)

Large Truck: Trucks over 10,000 pounds gross vehicle weight rating, including single-unit trucks and truck tractors. (BTS11)

LAS: McCarran International Airport (FAA11)

LASH: Lighter Aboard Ship (MARAD1)

Lashing: A comparatively short manila line with an eye spliced in one end, used to moor barges and tows when passing through locks. Its average length is about 60 feet with sizes varying from 1 3/4 to 3 inches in circumference. The line is thrown somewhat in the manner of a lasso (hence the eye spliced) to catch a wall pin or bollard so as to snub the movement of barges and then moor them in the lock chamber. Also, any short length of line used to secure two barges end to end or side by side. (TNDOT1)

LAST: Lakewood Administrative Services Team (FHWA18)

Last Assigned Altitude: The last altitude/flight level assigned by Air Traffic Control (ATC) and acknowledged by the pilot. (FAA4)

LATA: Local Access and Transport Area (FAA20)

LATCH: Lower Anchors and Tethers for Children (NHTSA7)

Latch Block: The lower extremity of a latch rod which engages with a square shoulder of the segment or quadrant to hold the lever in position. (49CFR236)

Latch Shoe: The casting by means of which the latch rod and the latch block are held to a lever of a mechanical interlocking machine. (49CFR236)

Lateral Dam: Usually a rock and brush structure constructed parallel with normal stream flow to train or confine the current to a definite channel. (TNDOT1)

Lateral Separation: The lateral spacing of aircraft at the same altitude by requiring operation on different routes or in different geographical locations. (FAA4)

Launching Ramp: A transportation structure used for launching boats. (DOI4)

LAWRS: Limited Aviation Weather Reporting Service (FAA20)

LAX: Los Angeles International Airport (FAA11)

Lay On the Air: Apply brakes. (ATA1)

Layover: Eight hours or more rest before continuing trip or any off-duty period away from home. (ATA1)

LB: Lighted Buoy (USCG5)

LBB: Lubbock International Airport (FAA11)

LBR: LAN Based Random Access Plan Position Indicator (FAA20)

LCC: Life Cycle Cost (FAA20)

LCCA: Life Cycle Cost Analysis (FHWA19)

LCD: Liquid Crystal Display (BTS10)

LCDR: Lieutenant Commander (USCG5)

LCF: Local Control Facility (FAA20)

LCGS: Low Cost Ground Surveillance Radar (FAA20)

LCL: Less-than-carload (FHWA19)

LCL: Less Than Container Load (MARAD2)

LCN: Local Communications Network (FAA20)

LCS: Lane Control Signal (FHWA19)

LCV: Longer Combination Vehicles (FHWA18)

LDA: Landing Distance Available (FAA12)

LDA: Landing Directional Aid (FAA20)

LDA: Localizer Directional Aid (FAA4) (FAA7)

LDA: Leadership Development Academy (FHWA16)

LDAP: Lightweight Directory Access Protocol (FAA20)

LDDV: Light Duty Diesel Vehicle (VDOT)

LDGV: Light Duty Gas Vehicle (VDOT)

LDIN: Lead-in Lights (FAA20)

LDP: Level of Development Plan (FHWA19)

LDR: Labor Distribution Report (FAA20)

LDT: Light-Duty Truck (BTS11)

LDT: Light Displacement Ton (MARAD4)

LDVS: Larger Dimensioned Vehicle Study (FHWA19)


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