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G: Grams (NHTSA3)

G-7: Group of 7 Nations (BTS2)

g/mi: Grams Per Mile (BTS11)

GA: General Aviation (FAA20)

GAA: General Aviation Activity (FAA6)

GAAA: General Aviation Activity and Avionics (FAA20)

GAAP: Generally Accepted Accounting Principles (FTA3)

GAAT: A General Aviation and Air Taxi Activity (BTS11)

GADO: General Aviation District Office (FAA20)

Gage: A scale graduated in tenths of a foot which indicates the water level or river stage. (TNDOT1)

Gaging Station: A structure used to measure the characteristics of a hydrographic feature. (DOI3)

GAIN: Global Aviation Information Network (BTS10)

Gallon: A volumetric measure equal to 4 quarts (231 cubic inches) used to measure fuel oil. One barrel equals 42 gallons. (DOE5)

GAMA: General Aviation Manufacturers Association (BTS10)

Gantry: A frame structure raised on side supports so as to span over or around something. (DOI4)

Gantry Crane: A crane hoisting machine mounted on a frame or structure spanning an intervening space. Used primarily in modern container handling ports. (TNDOT1)

GAO: Government Accountability Office (DOT1)

GAO: General Accounting Office (FAA17)

Gap: Low point or opening between hills or mountains or in a ridge or mountain range. (DOI4)

GARA: General Aviation Revitalization Act (BTS10)

Garage: A space large enough to accommodate a car, with a door opening at least six feet wide and seven feet high. "Attached" means it is under part or all of the house or it shares part of a wall in common with the house. Not included are carports, barns, or buildings (not connected to the house) or storage space for golf carts or motorcycles. (DOE5)

Garbage and Trash Collection: Establishments primarily engaged in collecting and transporting garbage, trash, and refuse, within a city, town, or other local area, including adjoining towns and suburban areas. (BOC1)

Gas: A non-solid, non-liquid combustible energy source that includes natural gas, coke-oven gas, blast-furnace gas, and refinery gas. (DOE5)

Gas Distribution Company: Company which obtains the major portion of its gas operating revenues from the operation of a retail gas distribution system, and which operates no transmission system other than incidental connections within its own system or to the system of another company. (AGA1)

Gas Guzzler Tax: Originates from the 1978 Energy Tax Act (Public Law 95418). A new car purchaser is required to pay the tax if the car purchased has a combined city/highway fuel economy rating that is below the standard for that year. For model years 1986 and later, the standard is 22.5 mpg. (DOE6)

Gas Transmission Pipelines: Pipelines installed for the purpose of transmitting gas from a source or sources of supply to one or more distribution centers, or to one or more large volume customers; or a pipeline installed to interconnect sources of supply. Typically, transmission lines differ from gas mains in that they operate at higher pressures and the distance between connections is greater. (BTS11)

Gasohol: A blend of finished motor gasoline (leaded or unleaded) and alcohol (generally ethanol but sometimes methanol) limited to 10 percent by volume of alcohol. Gasohol is included in finished leaded and unleaded motor gasoline. (DOE3)

Gasoline: A complex mixture of relatively volatile hydrocarbons, with or without small quantities of additives that have been blended to produce a fuel suitable for use in spark ignition engines. Motor gasoline includes both leaded or unleaded grades of finished motor gasoline, blending components, and gasohol. Leaded gasoline is no longer used in highway motor vehicles in the United States. (BTS11)

Gasoline Aviation/Gasoline Blending Components: Naphthas that will be used for blending or compounding into finished aviation gasoline (e.g., straight-run gasoline, alkylate, reformate, benzene, toluene, and xylene). Excludes oxygenates (alcohols, ethers), butane, and pentanes plus. Oxygenates are reported as other hydrocarbons, hydrogen, and oxygenates. (DOE5)

Gate: A structure that may be swung, drawn or lowered to block an entrance or passageway. (DOI3)

Gate Dam: A type of opening in a dam whereby the water passes over the top. (TNDOT1)

Gate Hold Procedure: Procedures at selected airports to hold aircraft at the gate or other ground location whenever departure delays exceed or are anticipated to exceed 16 minutes. The sequence for departure will be maintained in accordance with initial call-up unless modified by flow control restrictions. Pilots should monitor the ground control and clearance delivery frequency for engine start/taxi advisories or new proposed start/taxi time if the delay changes. (FAA4)

Gateway: In the context of travel activities, gateway refers to a major airport or seaport. Internationally, gateway can also mean the port where customs clearance takes place. (USTTA1)

Gathering Line: A pipeline 219.1 mm (8 5/8 inches) or less nominal diameter that transports petroleum from a production facility. (49CFR195)

GATT: General Agreement On Tariffs and Trade (BTS2)

GAWR: Gross Axle Weight Rating (49CFR571)

GBF/DIME: Geographic Base File / Dual Independent Map Encoding (BTS8)

GBL: Government Bill of Lading (MARAD2)

GCA: Ground Control Approach (FAA20)

GCC: Global Climate Change (FHWA18)

GCIS: Grade Crossing Inventory System (BTS7)

GCP: Ground Control Point (FHWA19)

GCW: Gross Combination Weight (FHWA19)

GCWR: Gross Combination Weight Rating (49CFR383) (TII2) (TII1)

GDE: Ground Delay Enhancements (FAA20)

GDL: Graduated Driver Licensing (NHTSA7)

GDP: The total value of goods and services produced by labor and property located in the United States. As long as the labor and property are located in the United States, the suppliers may be either U.S. residents or residents of foreign countries. (BTS12)

GDP: Ground Delay Program (FAA20)

GDP: Gross Domestic Product (NHTSA7)

Gear Bonger: Driver who grinds gears when shifting. (ATA1)

Gear Jammer: One who constantly clashes the gears. (ATA1)

Gear Ratio: The number of revolutions a driving gear requires to turn a driven gear one revolution. For a pair of gears, the ratio is found by dividing the number of teeth on the driven gear by the number of teeth on the driving gear. (GSA2)

GEC: General Engineering Consultant (FTA5)

GEG: Spokane International Airport (FAA11)

General Accounting Office: The General Accounting Office is the audit, evaluation, and investigative arm of Congress. GAO exists to support the Congress in meeting its Constitutional responsibilities and to help improve the performance and ensure the accountability of the federal government for the American people. GAO examines the use of public funds, evaluates federal programs and activities, and provides analyses, options, recommendations, and other assistance to help the Congress make effective oversight, policy, and funding decisions. In this context, GAO works to continuously improve the economy, efficiency, and effectiveness of the federal government through financial audits, program reviews and evaluations, analyses, legal opinions, investigations, and other services. GAO's activities are designed to ensure the executive branch's accountability to the Congress under the Constitution and the government's accountability to the American people. GAO is dedicated to good government through its commitment to the core values of accountability, integrity, and reliability. (FHWA21)

General Administration: All activities associated with the general administration of the transit system, including transit system development, injuries and damages, safety, personnel administration, legal services, insurance, data processing, finance and accounting, purchasing and stores, engineering, real estate management, office management and services, customer services, promotion, market research and planning. (FTA1)

General and Administrative Expenses: Expenses of a general corporate nature and expenses incurred in performing activities which contribute to more than a single operating function such as general financial accounting activities, purchasing activities, representation at law, and other general operational administration not directly applicable to a particular function. Passenger service, aircraft and traffic servicing, and promotion and sales expenses are also included for certain small air carriers. (BTS4)

General Average: A general loss voluntarily incurred to save all interest involved in a common maritime adventure from an impending peril including hull, cargo, and freight at risk. (TNDOT1)

General Aviation: Movements of aircraft and helicopters belonging to: companies with an air taxi or air work license; an individual, a flying club or a company whose main objective is not to provide revenue passenger transport. (ACI1)

General Aviation: 1) All facets of civil aviation, except facets of those air carriers holding a Certificate of Public Convenience and Necessity. 2) All civil aviation activity except that of air carriers certificated in accordance with Federal Aviation Regulations (FAR) Parts 121, 123, 127, and 135. The types of aircraft used in general aviation range from corporate multiengine jet aircraft piloted by professional crews to amateur-built single-engine piston-driven acrobatic planes to balloons and dirigibles. 3) All civil aviation operations other than scheduled air services and nonscheduled air transport operations for taxis, commuter air carriers, and air travel clubs that do not hold Certificates of Public Convenience and Necessity. (BTS11)

General Aviation Airport: Any airport which is used or to be used for public purposes, under the control of a public agency, the landing area of which is publicly owned. (FAA2)

General Aviation District Office: A Federal Aviation Administration (FAA) field office serving a designated geographical area and staffed with Flight Standards personnel who have the responsibility for serving the aviation industry and the general public on all matters relating to the certification and operation of general aviation aircraft. (FAA4)

General Aviation Operations: Takeoffs and landings of all civil aircraft, except those classified as air carriers or air taxis. (FAA13) (FAA14)

General Cargo: General cargo consists of those products or commodities such as timber, structural steel, rolled newsprint, concrete forms, agricultural equipment that are not conducive to packaging or unitization. Break-bulk cargo (e.g., packaged products such as lubricants and cereal) are often regarded as a subdivision of general cargo. (MARAD1)

General Cargo: The tonnes of cargo assessed at the General rate of tolls as defined in the St. Lawrence Seaway Tariff of Tolls. (SLSDC1)

General Cargo Ship: A ship configured to accommodate general, break-bulk, and containerized cargoes. Cargo handling operations are labor intensive and conducted with either ship's cranes or jib cranes onshore. These ships traditionally have numerous holds located on several decks, have smaller hatches than bulk carriers or containerships, and are usually equipped with a boom or crane positioned at each hatch cover. (MARAD1)

General Estimates System: A data collection system that uses a nationally representative probability sample selected from all police-reported highway crashes. It began operation in 1988. (BTS11)

General Export License: Authorization to export without specific documentary approval. (TNDOT1)

General Freight Carrier: Trucking company engaged in shipping packaged, boxed, and palletized goods that can be transported in standard, enclosed tractor-trailers, generally 40 to 48 feet in length. (BOC2)

General Utility, Stage I Airport: This type of airport serves all small airplanes. Precision approach operations are not usually anticipated. This airport is designed for airplanes in Airport Reference Code B-II. (FAA12)

General Utility, Stage II Airport: This type of airport serves large airplanes in Aircraft Approach Category A and B and usually has the capability for precision approach operations. This airport is normally designed for Airport Reference Code B-III. (FAA12)

General Warehousing and Storage: Establishments primarily engaged in the warehousing and storage of a general line of goods. (BOC1)

GENOT: General Notice (FAA20)

GEO: Geostationary Earth Orbit (BTS10)

Geo Map: The digitized map markings associated with the Airport Surveillance Radar (ASR-9) Radar System. (FAA4)

Geographical Information System: A system of hardware, software, and data for collecting, storing, analyzing, and disseminating information about areas of the Earth. For Highway Performance Monitoring System (HPMS) purposes, Geographical Information System (GIS) is defined as a highway network (spatial data which graphically represents the geometry of the highways, an electronic map) and its geographically referenced component attributes (HPMS section data, bridge data, and other data including socioeconomic data) that are integrated through GIS technology to perform analyses. From this, GIS can display attributes and analyze results electronically in map form. (FHWA2)

GES: General Estimates System (BTS10)

GETS: Government Emergency Telecommunications Service (FAA20)

GETS: Grievance Electronic Tracking System (FAA20)

GFE: Government Furnished Equipment (FAA20)

GFM: Government Furnished Materials (FAA20)

GFP: Government Furnished Property (FAA20)

GHG: Greenhouse Gas Emissions (FMCSA1)

Gigawatt: One billion watts or one thousand megawatts. (DOE5)

Gigawatt Electric: One billion watts of electric capacity. (DOE5)

Gigawatt Hour: One billion watthours. (DOE5)

GIS: Geographic Information System (BTS11)

Glad Hands: Air hose brake system connections between tractor and trailer. (ATA1)

GLCTTR: Great Lakes Center of Truck Transportation Research (FHWA19)

Glidepath: A descent profile determined for vertical guidance during a final approach. (FAA4)

Glider: A heavier-than-air aircraft, that is supported in flight by the dynamic reaction of the air against its lifting surfaces and whose free flight does not depend principally on an engine. (14CFR1)

Glideslope: Provides vertical guidance for aircraft during approach and landing. The glideslope/glidepath is based on the following: 1) Electronic components emitting signals which provide vertical guidance by reference to airborne instruments during instrument approaches such as Instrument Landing System (ILS)/Microwave Landing System (MLS), or 2) Visual ground aids, such as Visual Approach Slope Indicator (VASI), which provide vertical guidance for a Visual Flight Rules (VFR) approach or for the visual portion of an instrument approach and landing or 3) Used by Air Traffic Control (ATC) to inform an aircraft making a Precision Approach Radar (PAR) approach of its vertical position (elevation) relative to the descent profile. (FAA4)

Global Positioning System: A space base radio positioning, navigation, and time transfer system being developed by the Department of Defense. When fully deployed, the system is intended to provide highly accurate position and velocity information, and precise time, on a continuous global basis, to an unlimited number of properly equipped users. The system will be unaffected by weather, and will provide a worldwide common grid reference system. The Global Positioning System (GPS) concept is predicated upon accurate and continuous knowledge of the spatial position of each satellite in the system with respect to time and distance from a transmitting satellite to the user. The GPS receiver automatically selects appropriate signals from the satellites in view and translates these into a three-dimensional position, velocity, and time. Predictable system accuracy for civil users is projected to be 100 meters horizontally. Performance standards and certification criteria have not yet been established. (FAA4)

GLONASS: Global Orbiting Navigational Satellite System (FAA20)

GM: General Motors (BTS2)

GMCC: General National Airspace System Maintenance Control Center (FAA20)

GMDSS: Global Maritime Distress and Safety System (BTS10)

GMIS: Grants Management Information System (FHWA12)

GML: Geography Markup Language (FAA20)

GMP: Guaranteed Maximum Price (FTA5)


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