| Terms | Definitions |
|---|
| CRS | Computer Reservation System. CRS provide information on airline schedules, fares and seat availability to travel agencies and allow agents to book seats and issue tickets. ( Airline On-Time Performance Data ) |
| Cancelled Flight | A flight that was listed in a carrier's computer reservation system during the seven calendar days prior to scheduled departure but was not operated. ( Airline On-Time Performance Data ) |
| Carrier Code | Code assigned by IATA and commonly used to identify a carrier. As the same code may have been assigned to different carriers over time, the code is not always unique. ( Air Carrier Statistics (Form 41 Traffic)- All Carriers, Airline On-Time Performance Data, Air Carrier Summary Data (Form 41 and 298C Summary Data), Air Carrier Statistics (Form 41 Traffic)- U.S. Carriers, Small Air Carrier Statistics (Form 298C Traffic Data), Air Carrier Financial Reports (Form 41 Financial Data), Aviation Support Tables ) |
| Census Division | Groupings of states that are subdivisions of the four census regions. There are nine divisions, which the Census Bureau adopted in 1910 for the presentation of data. ( American Travel Survey (ATS) 1995, Nationwide Personal Transportation Survey (NPTS) ) |
| Census Region | Groupings of states that subdivide the United States for the presentation of data. There are four regions -- Northeast, Midwest, South, and West. Each of the four divisions is divided into two or more census divisions. ( American Travel Survey (ATS) 1995 ) |
| Groupings of states that subdivide the United States for the presentation of data. There are four regions -- Northeast, Midwest, South, and West. Each of the four regions is divided into two or more census divisions. ( Nationwide Personal Transportation Survey (NPTS) ) |
| Certificate Of Public Convenience And Necessity | A certificate issued to an air carrier under 49 U.S.C. 41102, by the Department of Transportation authorizing the carrier to engage in air transportation. ( Airline On-Time Performance Data, Air Carrier Financial Reports (Form 41 Financial Data) ) |
| Certificated Air Carrier | An air carrier holding a Certificate of Public Convenience and Necessity issued by DOT to conduct scheduled services interstate. Nonscheduled or charter operations may also be conducted by these carriers. (same as Certified Air Carrier) ( Airline On-Time Performance Data ) |
| Certified Air Carrier | An air carrier holding a Certificate of Public Convenience and Necessity issued by DOT to conduct scheduled services interstate. Nonscheduled or charter operations may also be conducted by these carriers. (same as Certificated Air Carrier) ( Airline On-Time Performance Data ) |
| City Market ID | An identification number assigned by US DOT to identify a city market. Use this field to consolidate airports serving the same city market. ( Air Carrier Summary Data (Form 41 and 298C Summary Data), Air Carrier Statistics (Form 41 Traffic)- All Carriers, Aviation Support Tables, Airline On-Time Performance Data, Airline Origin and Destination Survey (DB1B), Air Carrier Statistics (Form 41 Traffic)- U.S. Carriers ) |
| Class I Motor Carriers | Carriers having annual carrier operating revenues (including interstate and intrastate) of $10 million or more after applying the revenue deflator formula in Note A. (Note A contains a deflator based on the Producer Price Index. It is available in 49 CFR 369) ( Motor Carrier Financial & Operating Information ) |
| Class II Motor Carriers | Carriers having annual carrier operating revenues (including interstate and intrastate) of at least $3 million but less than $10 million after applying the revenue deflator formula in Note A. (Note A contains a deflator based on the Producer Price Index. It is available in 49 CFR 369) ( Motor Carrier Financial & Operating Information ) |
| Class III Motor Carriers | Carriers having annual carrier operating revenues (including interstate and intrastate) of less than $3 million after applying the revenue deflator formula in Note A. (Note A contains a deflator based on the Producer Price Index. It is available in 49 CFR 369) ( Motor Carrier Financial & Operating Information ) |
| Codeshare | An arrangement whereby a marketing carrier's code is used to identify a flight operated by another carrier. The marketing carrier may make reservations and issue tickets for the operating carrier's flights. ( Airline Origin and Destination Survey (DB1B) ) |
| Commercial Operator | A person who, for compensation or hire, engages in the carriage by aircraft in air commerce of persons or property, other than as an air carrier or foreign air carrier or under the authority of 14CFR375. Where it is doubtful that an operation is for compensation or hire, the test applied is whether the carriage by air is merely incidental to the person's other business or is, in itself, a major enterprise for profit. ( Air Carrier Financial Reports (Form 41 Financial Data) ) |
| Commodity | Products that an establishment produces, sells, or distributes. This does not include items that are considered as excess or byproducts of the establishment's operation. For the Commodity Flow Survey, respondents reported the description and the five-digit Standard Classification of Transported Goods (SCTG) code for the major commodity contained in the shipment, defined as the commodity with the greatest weight in the total shipment. ( Commodity Flow Survey (CFS) ) |
| Common Carrier | A business or agency that is available to the public for transportation of persons, goods, or messages. ( Motor Carrier Financial & Operating Information ) |
| Commuter Air Carrier | An air taxi that provides scheduled passenger service between two points at least 5 days a week. ( Small Air Carrier Statistics (Form 298C Traffic Data) ) |
| Commuter Trip | See Journey-to-Work. ( Census Transportation Planning Package (CTPP) 1990 ) |
| Completed Departures | Takeoffs made at an airport. (same as Departures Performed) ( Small Air Carrier Statistics (Form 298C Traffic Data) ) |
| Consolidated Metropolitan Statistical Area (CMSA) | A CMSA is a metropolitan complex of I million or more population, containing two or more component parts designated as primary metropolitan statistical areas (PMSAs). ( Nationwide Personal Transportation Survey (NPTS) ) |
| If an MSA has a population of 1 million or more and meets requirements specified in the standards, it is termed a CMSA, consisting of two or more major components, each of which is recognized as a primary metropolitan statistical areas (PMSA). ( Nationwide Personal Transportation Survey (NPTS) ) |
| Contract Carrier | For Hire interstate operators [which] offer transportation services to certain shippers under contracts. ( Motor Carrier Financial & Operating Information ) |
| Coupon | A piece of paper or series of papers indicating the itinerary of a passenger. An airline ticket includes an auditor's coupon, flight coupons, and a passenger receipt. ( Airline Origin and Destination Survey (DB1B) ) |
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