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P & D's: Pick up and deliveries of freight. (ATA1)

P.M. Peak Period: (See also A.M. Peak Period) The period in the afternoon or evening when additional services are provided to handle higher passenger volumes. The period begins when normal headways are reduced and ends when headways are returned to normal. (FTA1)

PAC: Pacific Region (USTTA1)

Package Freight: In the historical tables, designates cargo consisting of miscellaneous packages generally unidentifiable as to commodity and carried only on vessels licensed by the respective Authorities in Canada and the United States. This commodity classification is no longer applicable. (SLSDC1)

Packaging: See also Packing and Crating, Packing Group.

Packaging: A receptacle and any other components or materials necessary for the receptacle to perform its containment function in conformance with the minimum packing requirements of 49CFR, Chapter I, Subchapter C. (49CFR171)

Packet: A boat, usually a coastal or river steamer, that plies a regular route, carrying passengers, freight, and mail. (TNDOT1)

Packing and Crating: Establishments primarily engaged in packing, crating, and otherwise preparing goods for shipping. (BOC1)

Packing Group: A grouping according to the degree of danger presented by hazardous materials. Packing Group I indicates great danger; Packing Group II, medium danger; Packing Group III, minor danger. (49CFR171)

PAD: Petroleum Administration for Defense (DOE7)

PADS: Planned Arrival and Departure System (FAA17)

Paid Storage: A vehicle on assignment to a customer agency but temporarily out of service (usually a seasonally used vehicle). (GSA2)

Paid-In Capital: Invested capital from stock subscribed or issued at a par or stated value (or the subscription value in the case of stock without par value) for preferred stock and common stock. (BTS4)

Pajama Wagon: Sleeper tractor. (ATA1)

PAL: Philippines Airlines (FAA18)

Pallet: A platform with or without sides, on which a number of packages or pieces may be loaded to facilitate handling by a lift truck. (MARAD2)

PAM: Peripheral Adapter Module (FAA19)

Pan Pan: (See also May Day) The international radio-telephony urgency signal. When repeated three times, indicates uncertainty or alert followed by the nature of the urgency. (FAA4)

Pancake: Brake diaphragm housing. (ATA1)

Panel Body: Small, fully enclosed truck body often used for small package delivery. (ATA1)

PAPI: Precision Approach Path Indicator (FAA17) (FAA19)

PAR: Police Accident Report (NHTSA3)

PAR: Precision Approach Radar (FAA4) (FAA6) (FAA19)

PAR: Preferential Arrival Route (FAA2)

Parachute: A device used or intended to be used to retard the fall of a body or object through the air. (14CFR1)

Parallel ILS Approaches: Approaches to parallel runways by Instrument Flight Rules (IFR) aircraft which, when established inbound toward the airport on the adjacent final approach courses, are radar separated by at least 2 miles. (FAA4)

Parallel Offset Route: A parallel track to the left or right of the designated or established airway/route. Normally associated with Area Navigation (RNAV) operations. (FAA4)

Parallel Runway: Two or more runways at the same airport whose centerlines are parallel. In addition to runway numbers, parallel runways are designated as L (left) and R (right) or, if three parallel runways exist, L (left), C (center), and R (right). (FAA4)

Paratransit: Comparable transportation service required by the American Disabilities Act (ADA) for individuals with disabilities who are unable to use fixed route transportation systems. (49CFR37) (APTA1)

PARIS: Passenger Routing and Information System (FTA4)

Park: (See also Parkway) A place or area set aside for recreation or preservation of a cultural or natural resource. (DOI4)

Park and Ride: An access mode to transit in which patrons drive private automobiles or ride bicycles to a transit station, stop, or carpool/vanpool waiting area and park the vehicle in the area provided for the purpose. They then ride the transit system or take a car-or vanpool to their destinations. (TRB1)

Park and Ride Lot: Designated parking area for automobile drivers who then board transit vehicles from these locations. (APTA1)

Parking Area: An area set aside for the parking of motor vehicles. (DOI4)

Parking Brake: A mechanism designed to prevent the movement of a stationary motor vehicle. (49CFR571)

Parking Brake System: A brake system used to hold a vehicle stationary. (49CFR393)

Parkway: (See also Park) A highway that has full or partial access control, is usually located within a park or a ribbon of park-like developments, and prohibits commercial vehicles. Buses are not considered commercial vehicles in this case. (FHWA2)

Participating Agency: A federal department or agency which transferred (consolidated) vehicles to the Interagency Fleet Management System (IFMS). (GSA2)

Particulates: Carbon particles formed by partial oxidation and reduction of the hydrocarbon fuel. Also included are trace quantities of metal oxides and nitrides, originating from engine wear, component degradation, and inorganic fuel additives. In the transportation sector, particulates are emitted mainly from diesel engines. (DOE6)

Pass: Any one of several distributary channels near the mouth of the Mississippi River. (TNDOT1)

Pass Cells: Piers on each side of the navigable pass of a dam. (TNDOT1)

Pass Sill Gage: Gage indicating depth through navigable pass. (TNDOT1)

Pass-Through Funds: Operating financial assistance passed through to other transit agencies that have no relationship to the directly operated and/or purchased transportation services provided by the designated recipient. (FTA1)

Passenger: With respect to vessels and for the purposes of 49 CFR 176 only means a person being carried on a vessel other than: the owner or his representative; the operator; a bona fide member of the crew engaged in the business of the vessel who has contributed no consideration for his carriage and who is paid for his services; or a guest who has not contributed any consideration directly or indirectly for his carriage. (49CFR171)

Passenger: A person who is on, boarding, or alighting from a railroad car for the purpose of travel, without participating in its operation. (FRA3)

Passenger: Any occupant of a motor vehicle who is not a driver. (NHTSA3)

Passenger Automobile: A passenger automobile is any automobile (other than an automobile capable of off-highway operation) manufactured primarily for use in the transportation of not more than 10 individuals. (49CFR523)

Passenger Car: A unit of rolling equipment intended to provide transportation for members of the general public, including self-propelled cars designed to carry baggage, mail, express and passengers. (49CFR223)

Passenger Car: A motor vehicle with motive power, except a multipurpose passenger vehicle, motorcycle, or trailer, designed for carrying 10 persons or less. (49CFR571)

Passenger Car: Any motor vehicle that is a convertible; 2-door sedan, hardtop, or coupe; a 4-door sedan or hardtop; a 3-or 5-door hatchback coupe; an automobile with pickup body; or station wagon. (NHTSA1)

Passenger Car: Any motor vehicle that is an automobile, auto-based pickup, large limousine, or three-wheel automobile or automobile derivative. (NHTSA2)

Passenger Car: Motor vehicles used primarily for carrying passengers, including convertibles, sedans, and station wagons. (NHTSA3)

Passenger Car Equivalence: The representation of larger vehicles, such as buses, as equal to a quantity of automobiles (passenger cars) for use in level of service and capacity analyses. (TRB1)

Passenger Count: A count of the passengers on a vehicle or who use a particular facility. (TRB1)

Passenger Enplanements: The total number of passengers boarding an aircraft. (BTS6)

Passenger Facility Charge (PFC): (See also Apportionment) Public agencies controlling a commercial service airport can charge enplaning passengers using the airport a $1, $2, or $3 facility charge. Public agencies must apply to the FAA and meet certain requirements in order to impose a PFC. (FAA11)

Passenger Flow: The number of passengers who pass a given location in a specified direction during a given period. (TRB1)

Passenger Load Factor: The percent that revenue passenger miles are of available seat-miles in revenue passenger services, representing the proportion of aircraft seating capacity that is actually sold and utilized. (BTS6) (FAA11)

Passenger Mile: One passenger transported one mile. Total passenger miles are computed by summation of the products of the aircraft miles flown on each inter-airport flight stage multiplied by the number of passengers carried on that flight stage. (AIA1) (FAA11) (NTSB1)

Passenger Mile: The movement of a passenger for one mile. (FRA2)

Passenger Miles: The total number of miles traveled by passengers on transit vehicles; determined by multiplying the number of unlinked passenger trips times the average length of their trips. (APTA1)

Passenger Miles: The cumulative sum of the distances ridden by each passenger. (FTA1)

Passenger Miles: The total number of miles traveled by transit passengers (e.g., a bus that carries 5 passengers for a distance of 3 miles incurs 15 passenger miles). (FTA2)

Passenger Per Aircraft Mile: The average number of passengers carried per aircraft in revenue passenger services, derived by dividing the total revenue passenger-miles by the total aircraft miles flown in revenue passenger services. (BTS6)

Passenger Revenue: Money, including fares and transfer, zone, and park-and-ride parking charges, paid by transit passengers; also known as "farebox revenue." (APTA1)

Passenger Revenue Ton Mile: One ton of revenue passenger weight (including all baggage) transported one mile. The passenger weight standard for both domestic and international operations is 200 pounds. (BTS5) (BTS6)

Passenger Service: Both intercity rail passenger service and commuter rail passenger service. (49CFR245)

Passenger Service Expenses: Costs of activities contributing to comfort, safety, and convenience of passengers while in flight and when flights are interrupted. Includes salaries and expenses of flight attendants and passenger food expenses. (BTS4)

Passenger Vehicle: A vehicle with a Gross Vehicle Weight Rating (GVWR) of 10,000 pounds or less which includes passenger cars, light pickup trucks, light vans, and utility vehicles. (NHTSA4)

Passenger Vehicle Crash: A motor vehicle crash involving at least one passenger vehicle. (NHTSA4)

Passenger Vessel: 1) A vessel subject to any of the requirements of the International Convention for the Safety of Life at Sea, 1974, which carries more than 12 passengers; 2) A cargo vessel documented under the laws of the United States and not subject to that Convention, which carries more than 16 passengers; 3) A cargo vessel of any foreign nation that extends reciprocal privileges and is not subject to that Convention and which carries more than 16 passengers; and 4) A vessel engaged in a ferry operation and which carries passengers. (49CFR171)

Passenger-Carrying Aircraft: An aircraft that carries any person other than a crewmember, company employee, an authorized representative of the United States, or a person accompanying the shipment. (49CFR171)

Passenger-Carrying Volume: The sum of the front seat volume and, if any, rear seat volume, as defined in 40 CFR 600.315, in the case of automobiles to which that term applies. With respect to automobiles to which that term does not apply, "passenger-carrying volume" means the sum in cubic feet, rounded to the nearest 0.1 cubic feet, of the volume of a vehicle's front seat and seats to the rear of the front seat, as applicable, calculated in 49 CFR 523.2 with the head room, shoulder room, and leg room dimensions determined in accordance with the procedures outlined in Society of Automotive Engineers (SAE) Recommended Practice J1100a, Motor Vehicle Dimensions (Report of Human Factors Engineering Committee, Society of Automotive Engineers, approved September 1973 and last revised September 1975). (49CFR523)

Passenger-Miles: One passenger transported 1 mile. Passenger miles are computed by the summation of the products of the aircraft-miles flown on each inter-airport flight multiplied by the number of passengers carried on the flight. (DOE6)

Passenger-Miles Traveled (PMT): One person traveling the distance of one mile. Total passenger-miles traveled by all persons. (DOE6)

Passengers On Trains (Class C): Persons who are on, boarding, or alighting from railroad cars for the purpose of travel. (FRA2)

Passing Daymark: A rectangular or triangular daymark used on lights which are intended for position reference only and are not to be steered on. (TNDOT1)

PATH: Port Authority Trans-Hudson (New York City/New Jersey) (FTA4)

PATH: Program for Advanced Transit and Highway (FHWA14)

Patron: A person who intends to use or has used the transit system and is on property affiliated with the transit system. An employee is not a patron. (FTA1)

PATS: Precision Automated Tracking System (FAA19)

PATWAS: Pilot's Automatic Telephone Weather Answering Service (FAA8)

Paved Road Surface: Bituminous, concrete, brick, block, and other special surfaces. (FHWA2)

Paved Surface: Surface of asphalt or concrete. (DOI3)

PAX: Passenger (MTMC1)

Payload: The maximum load that a unit of equipment may carry within its total rated capacity. The payload is the Gross Vehicle Weight Rating (GVWR) less the tare weight or actual weight of the unloaded vehicle. (GSA2)

Payload: Weight of commodity being hauled. Includes packaging, pallets, banding, etc., but does not include the truck, truck body, etc. (TII1) (TII2)

PB: Lead (BTS2)

PBCT: Proposed Boundary Crossing Time (FAA4)

PBI: Palm Beach International Airport (FAA11)

PBJ: Peanut Butter and Jelly Sandwich

PC: Personal Computer (USCG5)

PC: Politically Correct

PCA: Positive Control Airspace (FAA17)

PCC: Portland Cement Concrete (FHWA7)

PCD: Personal Communication Device (FTA4)

PCE: Passenger Car Equivalence (TRB1)

PCE: Personal Consumption Expenditure (DOE6)

PDAR: Preferential Departure and Arrival Route (FAA2)

PDC: Pre - Departure Clearance (FAA17) (FAA7) (FAA19)