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Dictionary

U.S.: United States (DOT2)

U.S. Flag Carrier Or American Flag Carrier (Air): One of a class of air carriers holding a Certificate of Public Convenience and Necessity issued by the U.S. Department of Transportation and approved by the President, authorizing scheduled operations over specified routes between the United States (and/or its territories) and one or more foreign countries. (BTS11)

UA: Urbanized Area (FHWA19)

UAS: Uniform Accounting System (FAA20)

UAS: Unmanned Aircraft Systems (FAA20)

UAT: Universal Access Transceiver (FAA20)

UAV: Unmanned Aerial Vehicle (MTMC1)

UBA: User Benefits Applications (FAA20)

UBI: User Benefits Infrastructure (FAA20)

UBOA: United Bus Owners of America (TRB1)

UCBITS: University of CA Berkeley Institute of Transportation Studies (FHWA19)

UCR: Unsatisfactory Condition Report (FAA20)

UCRS: Urban and Rural Commuter Service (MOCD1)

UDO: Undelivered Orders (DOT1)

UFAS: Uniform Federal Accessibility Standard (FAA20)

UFC: Uniform Freight Classification (FMCSA2)

UFO: Unidentified Flying Object

UGPTI: Upper Great Plains Transportation Institute (FHWA18)

UHF: Ultra High Frequency (FAA20)

UIIA: Uniform Intermodal Interchange Agreement (FHWA19)

UITP: International Union of Public Transport (TRB1)

ULB: Unlighted Buoy (USCG5)

ULCC: Ultralarge Crude Carrier (DOE7)

ULCC: Utility Location and Coordination Council (FHWA18)

ULEV: Ultra Low Emissions Vehicle (VDOT)

Ullage: The amount by which a packaging falls short of being liquid full, usually expressed in percent by volume. (49CFR171)

Ullage: The amount by which a packaging falls short of being liquid full, usually expressed in percent by volume. (49CFR171)

Ultra-Low Emission Vehicle: A lean fuel vehicle meeting the more stringent Ultra-low emission standards. (DOE6)

UMLER: Uniform Machine Language Equipment Register (RSPA1)

UMTA: Urban Mass Transportation Administration (Now Federal Transit Administration) (OFR1)

UMTRI: University of Michigan Transportation Research Institute (FHWA18)

UMTRIS: Urban Mass Transportation Research Information Service (TRB1)

UN: United Nations (RSPA1)

Under Construction Road: Road construction has begun but is not completed. (DOI3)

Under Construction Runway: Construction has begun but is not completed. (DOI3)

Underneath the Point: Directly below and downstream from the point of land. (TNDOT1)

Underpass: The grade separation where part or all of one feature instance is directly above part or all of another feature instance. (DOI3)

Undredged Shipping Lane: Lane has not been dug out. (DOI3)

UNFCCC: United Nations Framework Convention on Climate Change (BTS10)

Unfinished Oil: Includes all oils requiring further processing, except those requiring only mechanical blending. In most cases, these are produced by partial refining or purchased in an unfinished state for conversion to finished products by further refining. (DOE5)

Unified Planning Work Program: The management plan for the (metropolitan) planning program. Its purpose is to coordinate the planning activities of all participants in the planning process. (FHWA21)

Union of Soviet Socialist Republic: Consisted of 15 constituent republics: Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgystan, Latvia, Lithuania, Moldava, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. As a political entity, the U.S.S.R. ceased to exist as of December 31, 1991. (DOE3)

Unit Load: Packages loaded on a pallet, in a crate or any other way that enables them to be handled at one time as a unit. (MARAD2)

Unit Load Device: Any type of freight container, aircraft container, aircraft pallet with a net, or aircraft pallet with a net over an igloo. (49CFR171)

Unit Tow: An integrated tow consisting of bow, center, and stem sections. Found generally in the liquid cargo trade. (TNDOT1)

Unit Train: A train of a specified number of railcars, perhaps 100, which remain as a unit for a designated destination or until a change in routing is made. (MARAD2)

United States Air Carrier: A citizen of the United States who undertakes directly by lease, or other arrangement, to engage in air transportation. (14CFR1)

United States Coast Guard: Established by act of January 28, 1915 (14 U.S.C. 1), became a component of the Department of Transportation on April 1, 1967, pursuant to the Department of Transportation Act of October 15, 1966 (49 U.S.C. app. 1651 note). The Coast Guard is a branch of the Armed Forces of the United States at all times and is a service within the Department of Transportation except when operating as part of the Navy in time of war or when the President directs. The predecessor of the Coast Guard, the Revenue Marine was established in 1790 as a federal maritime law enforcement agency. Other responsibilities include: search and rescue, maritime law enforcement, marine inspection, marine licensing, Great Lakes pilotage, marine environmental response, port safety and security, waterways management, aids to navigation, bridge administration, ice operations, deepwater ports, boating safety, Coast Guard auxiliary, military readiness, reserve training and Marine Safety Council. (OFR1)

United States Code: Contains a consolidation and codification of all general and permanent laws of the U.S. (USCG1)

United States Flag Carrier: One of a class of air carriers holding a Certificate of Public Convenience and Necessity issued by the DOT, approved by the President, authorizing scheduled operations over specified routes between the United States (and/or its territories) and one or more foreign countries. (FAA2) (FAA14)

United States Territories: Include Samoa, Guam, the Northern Marianas, and the Virgin Islands. (FHWA2)

United States Travel and Tourism Administration: An agency in the Commerce Department; it's principal mission is to implement broad tourism policy initiatives for the development of international travel to the U.S. as a stimulus for economic stability. (USTTA1)

UNIX: Uniplexed Information and Computing System (FAA20)

Unladen Inland Waterways Traffic: Any movement of an Inland Waterways Transport (IWT) freight vessel for which the gross weight of goods carried, including that of equipment such as containers, swap-bodies and pallets, is nil; as well as any movement of an IWT passenger vessel without passengers. (TNDOT1)

Unlatch: Release lock on fifth wheel to drop trailer. (ATA1)

Unleaded 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)

Unlinked Passenger Trip: The number of passengers who board public transportation vehicles. Passengers are counted each time they board vehicles no matter how many vehicles they use to travel from their origin to their destination. (BTS14)

Unlinked Passenger Trips: The number of passengers boarding public transportation vehicles. A passenger is counted each time he or she boards a vehicle even if the boarding is part of the same journey from origin to destination. (BTS13)

Unloaded Vehicle Weight: The weight of a vehicle with maximum capacity of all fluids necessary for operation of the vehicle, but without cargo, occupants, or accessories that are ordinarily removed from the vehicle when they are not in use. (49CFR571)

Unpaved Road Surface: Gravel/soil and unimproved roads and streets (Surface/Pavement Type Codes 20, 30 and 40). (FHWA2)

Unpaved Road Surface: Gravel/soil and unimproved roads and streets (Surface/Pavement Type Codes 20, 30 and 40). (FHWA2) (FHWA21)

Unsatisfactory Condition Classification: Facility is not operational and is not serving the purpose for which it was constructed. (DOI2)

Unscheduled Repair: Maintenance requiring the emergency repair of a piece of equipment as distinguished from those repairs performed during a scheduled cycle. (GSA2)

UP: Union Pacific Railroad (FRA5)

Up the Hill: Anything away from the towboat and on shore. When a river man has "gone up the hill," he has gone ashore, whether it be in a city or on a mountainside or across a prairie. (TNDOT1)

Up-and-Down Rod: A rod used for connecting the semaphore arm to the operating mechanism of a signal [with respect to rail operations]. (49CFR236)

Upper Coupler Assembly: A structure consisting of an upper coupler plate, king-pin and supporting framework which interfaces with and couples to a fifth wheel. (49CFR393)

Upper Coupler Plate: A plate structure through which the king-pin neck and collar extend. The bottom surface of the plate contacts the fifth wheel when coupled. (49CFR393)

Upper Gage: A water level gage located at the upper end of the lock. (TNDOT1)

Upper-Half of Saddle-Mount: That part of the device which is securely attached to the towed vehicle and maintains a fixed position relative thereto, but does not include the "king-pin." (49CFR393)

UPPL: Uniform Accident and Sickness Policy Provision Law (NHTSA7)

UPR: User Preferred Route (FAA20)

UPS: United Parcel Service (BTS10)

UPS: Uninterruptible Power System (FAA19)

UPS: Uninterruptable Power Supply (FAA20)

UPT: User Preferred Trajectory (FAA20)

UPWP: Unified Planning Work Program (FHWA18)

URA: Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970 (FAA20)

URAA: Uniform Relocation Assistance Act (FHWA18)

Urban: Usually refers to areas with population of 5,000 or greater. (DOE6)

Urban Area: Any area that includes a municipality or other built up place which is appropriate, in the judgement of the Secretary of Transportation, for a public transportation system to serve commuters or others in the locality taking into consideration the local patterns and trends of urban growth. (FTA1)

Urban Arterial Routes: Those public roads that are functionally classified as a part of the urban principal arterial system or the urban minor arterial system as described in volume 20, appendix 12, Highway Planning Program Manual. (23CFR470)

Urban Collector Routes: Those public roads that are functionally classified as a part of the urban collector system as described in volume 20, appendix 12, Highway Planning Program Manual. (23CFR470)

Urban Ferryboat: A boat providing fixed-route service across a body of water with one or more terminals within an urbanized area, excluding international and urban park ferries. (APTA1)

Urban Highway: Any highway, road, or street within the boundaries of an urban area. An urban area is an area including and adjacent to a municipality or urban place with 5,000 or more population. The boundaries of urban areas are fixed by the states, subject to the approval of the Federal Highway Administration, for purposes of the Federal-Aid highway program. (BTS11)

Urban Inland Waterways Transport: Transport carried out on inland waterways located within the boundaries of a built-up area. (TNDOT1)

Urban Place: A U.S. Bureau of Census-designated area consisting of incorporated political units or closely settled unincorporated areas outside an urbanized area. (APTA1)

Urbanized Area: 1) Areas with a population of 50,000 or more, at a minimum, encompass an entire urbanized area in a state, as designated by the U.S. Bureau of the Census. The Federal Highway Administration (FHWA) approved, adjusted urbanized area boundaries include the census defined urbanized areas plus transportation centers, shopping centers, major places of employment, satellite communities, and other major trip generators near the edge of the urbanized area, including those expected to be in place shortly. 2) An approximate classification of sample households as belonging to an urbanized area or not. Those classified as belong to an urbanized area were either in a central city of a Metropolitan Statistical Area (MSA), or in a MSA but outside the central city, and within a zip code area with a population density of at least 500 people per square mile in 1990. (FHWA2) (FHWA3)

Urbanized Area Formula Program Funds: Financial assistance from the Urbanized Area Formula Program (formerly Section 9). This program governs the distribution of the public transit capital and operating block grant appropriations by urbanized area. For this form, it is the Federal capital assistance granted to public transit agency providers to designated recipients on behalf of transit providers. (FTA1)

URCS: Uniform Railroad Cost System (BTS7)

URET: User Request Evaluation Tool (FAA20)

URISA: Urban and Regional Information Systems Association (ENO1)

URS: Unified Registration System (FMCSA1)

US: United States (AIA1) (BTS2) (FAA2)

USACE: U.S. Army Corps of Engineers (BTS11)

USAF: U.S. Air Force (FAA19) (FAA13) (FAA14)

USAF: United States Air Force (FAA20)

USATCFE: U.S. Army Transportation Center & Fort Eustis (MTMC1)

USATS: U.S. Air Traffic Service Corporation (FAA7)

USATSCH: U.S. Army Transportation School, Ft Eustis, VA (MTMC1)

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